| bigparsnip |
Right, I tought I would set this up in a new thread, as the old one for the PCB order is getting rather bussy now.
I have been having a look about at putting together bits for a comonent kit for this project now and I ahve come to a point where I need peoples oppinions on what to do.
Basicaly, I can get together the heatsinks, capacitors and resistors needed for one rectifier PCB for £4.50 (as long as there is enough intrest to hit the price breaks at 100+ unit quantities, so that would be 25 kits). This would include:
four heatsinks (around 9degc/w, at 50.8mm in length)
four 100nF, 250V metalised polypropylene X2 Capacitors
four 100 ohm 0.6W, 1% metal film resistors
Obviousley, I will still be including all of the terminal lugs with the boards, so this would provide everyting but the diodes. Which leads me on to my main point of concern; basical these diodes are quite expensive unless we want to buy a lot of them all at once (if there was enough intrest to get up to 25 kits worth of diodes - 100 of them - this would bring the price down to about £1.50 each, or £6.00 per kit).
Now, what I would like to know from people is who would be intrested in the kits without the diodes (for £4.50 each), and who would be intrested in kits with the diodes (about £10.50 each). If people would state their intrest here, allong with how many of each (or either) they would be intrested in it can give me some idea as to wether or not this would be feasable to organise. |
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| SineEra |
BP
Interested in the whole lot from source please.
Are the other items, caps and resistors the best quality as I am not skimping on anything to do with my Aleph X, would rather wait another month and get the best available.
I presume the diode is the BYW99W-200.
thanks
Simon |
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| leadbelly |
Interested in 2 full kits with diodes.
Boy, your prices are great! Even with the cr@ppy exchange rate at the moment. |
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| Jarno |
Hi,
I ordered boards from you but at these prices I would like component kits as well!
Depending on the current spec of the diodes I would be in for either 2 complete and 4 kits without diodes or 6 complete kits.
I would like to use these in my Pass Aleph 5 clones and my gainclone. Current spec for the gainclones is not so critical I guess. But for the Aleph's I need about 20Amps, are the diodes up to this?
Regards,
Jarno. |
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| bigparsnip |
Hi, sorry about that, I did forget to mention which diodes I was supposed to be going for. The ones I had looked at getting are the ST microelectronics BYW99W-200 dual fast recovery diodes in a TO-247 package which I believe are the same type as used in all current PASS power amps (so they should be fine for an Aleph 5).
The only minor problem that I can envisage with this group buy is that there are large lead times on the haetsinks for this kit. I have come up with two possible sources so far, but they are slightly different sinks, and at different prices (but hopefully I should be able to get the majority at the lower price, so it won't effect the overall kit price, but I guess I will just have to deal with that as it comes).
Also, SineEra, whilst the resistors are not quite 0.1% dale's, they are good quality 1% 0.6W metal film types from TruOhm and should be more than good enough for what they do. same goes with the caps, which are also good quality items (with the added benifit of being X2 rated, so they are strong enough to sit on a live 240V mains line without being damaged). |
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| pkpickard |
Andrew -
Three kits w/o diodes, but my paypal account is sucked dry. Does a money order work? |
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| bigparsnip |
| What sort of money order? I think there is an american express 'shop' not too far from here and I'm not too sure what services they offer so it may be possible, but it will most likely be at least a few more days 'till I know if there is enough intrest to go ahead with the order (probably for the kit with diodes if the replies so far are anything to go by) so you don't need to be in too much of a hurry for now. |
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| leadbelly |
| quote: | Originally posted by bigparsnip
What sort of money order? I think there is an american express 'shop' not too far from here |
You might also look at Western Union BidPay if there is a large enough request for alternate payment means. Their fees are higher than PayPal, but it's the buyer that gets dinged for the extra cost, not the seller. |
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| pkpickard |
| quote: | Originally posted by leadbelly
You might also look at Western Union BidPay if there is a large enough request for alternate payment means. Their fees are higher than PayPal, but it's the buyer that gets dinged for the extra cost, not the seller. |
I've never seen the value in Bidpay. Basically you pay a huge fee in order to have someone else cut a money order and mail it for you. How is this any better than me mailing a money order myself, other than the e-mail notification? We'll work something out, if the group buy comes together. |
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| leadbelly |
| quote: | Originally posted by pkpickard
I've never seen the value in Bidpay. Basically you pay a huge fee in order to have someone else cut a money order and mail it for you. How is this any better than me mailing a money order myself, other than the e-mail notification? We'll work something out, if the group buy comes together. |
Do not take this as an endorsement of BidPay, I don't like it. But having priced it out a while back, I know that if you need to get a money order somewhere fast, it is about the same cost and more convenient than buying a money order and paying for express mail too. |
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| SineEra |
Andrew
Thanks for the info, 4 to go please.
Have you modelled these at all? Looking to model the whole PSU. Know of any inductor suppliers in the UK? for a choke regulated supply.
TIA
Simon |
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| Michi124 |
| quote: | Originally posted by bigparsnip
The only minor problem that I can envisage with this group buy is that there are large lead times on the haetsinks for this kit. |
I can offer my help on this one. What about ordering the heatsinks directly from Fischer?
Here are the prices from their catalogue for the SK 104/50,8/STC (incl. VAT):
€ 1,06 each (100 off)
€ 0,94 each (250 off)
On the original Wiki, members (including me) asked for 47 component kits, which counts for 188 heatsinks.
250 should not be impossible to reach. Anyway, the next price break is at 500 sinks at € 0,80 each. ;)
A good friend of mine who lives close to their factory can pick the order up and send it to Andrew for € 16,50.
Tomorrow, I'll phone Fischer and ask for THEIR lead time... |
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| bigparsnip |
SineEra: I haven't modeled this at all, as first off, I wasn't sure if there would be a consitent way of getting a good idea of what the output of this would look like (I was asuming, I would have to build a few with diferent component values, and go see if teh nice people in the electronics lab would let me play for an hour or two). However, looking at existing designs, the basic combination of 100 ohms and 100nF, seems very popular (so far a eneral start point it can't be too bad). Although, if you are realy intrested in what effect the values will have on the sound I don't think I can sujest anything better than trying few and listening (as the measurements don't always seem to confirm what we measure).
Michi124:
I'm assuming there will be some sort of tax that needs to be added to this price, but if it isn't too much, these may still be good enough to compare to the supplier I have found, and if the lead times are subatantialy better it may definately worth looking into further (feel free to get in touch by e-mail if there is anything you would like to ask about this). |
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| jonclancy |
Andrew,
the direct Fischer prices include VAT, and it's a about a tenner delivery. If we ordered from the UK, delivery would be ablout the same, but the prices I emailed you exclude VAT.
Could be the way to go..........?
Also, TruOhm do a 0.1% part (Rapid Electronics) 100R 0.4W at 25 pence each plus VAT.
Cheers
Jon :) |
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| bigparsnip |
Jon, as I mentioned in my post above, when it comes to the snubbing network, the 100 ohm, 100nF components would just be an educated guess at what values would work best here for a range of applications. Therefore, I really don't think it would be worth the extra to use the hige precision resistors in this place, as the don't have to be exactly 100 ohms to work.
However what may be better for me to do here is to offer three smaller kits instad of the one main one so that people only need to take the bits they want. I guess that would be like below:
Kit 1: Capacitors And Resistors
£1.00
Kit 2: Heatsinks
£4.00 (this will depend on where the heatsinks come from and how many we get, but should be a little less, hopefully about £3.50)
Kit 3: Diodes
£6.00 (again this will need a minimum order of around 100 diodes to get to this price, but that shouldn't be too difficult)
(all parts would still be the same as listed above, with possible slight variations in the heatsink which shouoldn't effect it's performance at all) |
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| bigparsnip |
Ok, I have just received four of the hatsinks I linked to in the first post today, to check to see if they fit ok and I ahve found one sligt issue with this particular model. The spacing on the rear of the heatsink is not quite the same as the SK104 part, and as such the large 7.5, or 100mm pitch caps won't fit in properly, oly 5mm pitch ones.
So, it does look like I will have to try and get a hold of the hetsinks from somwhere other than rapid for the kits, which means the price for the four heatsinks may be a little more than I mentioned above (but should still be around £4.00, just might not get down to £3.50 any more). |
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| Kram |
Hello BP
I would take 4 complete kits plus another 16 heatsinks.
Does Kit 3 contain everything to make 1 rectifier?
Thanks
Mark. |
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| bigparsnip |
No, to populate one full rectifier (with snubbers, diodes and heatsinks) you would need one each of kits 1 2 and 3, which would give you the four diodes, four heatsinks, four caps and four resistors (as well as the mounting bolts for conecting the diodes to the heatsink which I guess I should include as well). So it would be about £11 ish for all of the components on the board, and the extra 16 heatsinks would be another four of kit 2 (about £16.00?).
Hope this make s things a little clearer now.
Andrew |
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| Coulomb |
Hello BP, this heatsink would be perfect for your boards I beleive. The are available from Digikey US for $1.50 US ea single piece, quantity discounts apply. If you buy 100 price drops to $0.87 US, that is only $0.47 pounds!!!!!!!
Is that a deal or what!!!! So a set of four would be less than $2 pounds, and how much could it cost to ship a small package from North America to the UK via Air Mail?
You may even be able to get Digikey UK to bring them in for you. I suppose you could find someone in North America to buy them for you and ship them over.
I have attached the PDF for you to certify they will work.
Regards
Anthony |
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| bigparsnip |
| Do you have a catalouge number or page number for those, as it is the correct profile and size, but it is missing a hole or two (so TO-220 and TO-247 devices an be used) so hopefuly there will be a slightly diferent model available there to. |
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| Coulomb |
| quote: | Originally posted by bigparsnip
Do you have a catalouge number or page number for those, as it is the correct profile and size, but it is missing a hole or two (so TO-220 and TO-247 devices an be used) so hopefuly there will be a slightly diferent model available there to. |
Actually there is an identical model with 3 different mounting holes in it. Hang On I will attach a file in a moment.
Anthony |
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| bigparsnip |
| The one with the three holes is the one I'm after so that would be great (especialy if you know the product number). |
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| Coulomb |
Give me a minute
HS131-P-ND
$1.72 US for 100 units
Image shows gold version, also available in black
Problem is this model is $0.94 UK Pounds each.
Anthony |
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| Coulomb |
Found a decent one for a more reasonable price.
$0.96 US ea. for quantity 100 = $0.52 UK Pounds ea. or 4 for $2.04 UK Pounds!!
PN# HS241-ND
Regards
Anthony |
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| bigparsnip |
How about HS241-ND, as this is a black version which show three mounting holes in the picture (how acurate are the digikey pictures anyone?) and is more cloesly priced to the previous one at 0.9625 in 100+ numbers.
SNAP |
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| Coulomb |
| quote: | Originally posted by bigparsnip
How about HS241-ND, as this is a black version which show three mounting holes in the picture (how acurate are the digikey pictures anyone?) and is more cloesly priced to the previous one at 0.9625 in 100+ numbers.
SNAP |
Uhh.. see previous post. :-)
Photo's are accurate, I have purchased these for myself in the past and they were exactly as depicted.
Regards
Anthony |
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| bigparsnip |
OK, unfortunately this particular item doesn't show up in the UK section of the digikey website, so I have sent a mail to them to ask for a quote on the parts. Hopefully this should arive soon, and give me a better idea of how much the kit of four heatsinks should cost.
Andrew. |
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| Coulomb |
| quote: | Originally posted by bigparsnip
OK, unfortunately this particular item doesn't show up in the UK section of the digikey website, so I have sent a mail to them to ask for a quote on the parts. Hopefully this should arive soon, and give me a better idea of how much the kit of four heatsinks should cost.
Andrew. |
Well if I have to spell it out for you BP, I will buy them from Digikey.ca and ship them to you if it helps you out. :)
Anthony |
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| bigparsnip |
Could I ask another favour with regard to these heatsinks (if you have some around):
would you be able to measure the diameter of the pins that support the heatsink, as I have just a had a look at the Aavid specs, and it states a hole size of 2.67mm (and I used a 2.5mm hole on the PCB, as the fischer variant had a maximum pin diameter of 2.3mm) but not size ofr the actual pins. |
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| Coulomb |
| quote: | Originally posted by bigparsnip
Could I ask another favour with regard to these heatsinks (if you have some around):
would you be able to measure the diameter of the pins that support the heatsink, as I have just a had a look at the Aavid specs, and it states a hole size of 2.67mm (and I used a 2.5mm hole on the PCB, as the fischer variant had a maximum pin diameter of 2.3mm) but not size ofr the actual pins. |
Sure I will take a pair of calipers to one of them tonight.
Regards
Anthony |
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| Coulomb |
| quote: | Originally posted by bigparsnip
Could I ask another favour with regard to these heatsinks (if you have some around):
would you be able to measure the diameter of the pins that support the heatsink, as I have just a had a look at the Aavid specs, and it states a hole size of 2.67mm (and I used a 2.5mm hole on the PCB, as the fischer variant had a maximum pin diameter of 2.3mm) but not size ofr the actual pins. |
0.095"
Anthony |
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| jonclancy |
2.413 millimeter
Allegedly!
;)
Jon |
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| bigparsnip |
Right, thanks, I'll have to wait to check that on the boards when they arrive (it looks like it is the same pin size as the other aavid types I ordered a couple of to try).
I'll also give a few other types I have a go and see which fits (I managed to find a compatable type by Wakefield Engineering which should have the right pin size and it's almost the same price as the digikey part) before I actualy put an order for any parts in. |
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| bigparsnip |
Ok, I have created (another) WIKI page now for this little group buy with quite a bit of information on it as well as what I believe the final prices should be (providing there are enough orders for the diodes). I have also posted dates for the closing of the order and a time by which I will need the money as I have my finals comming up soon and I want this out the way (at least the ordering part anyway) before they start.
I have put down the orders that people have listed os far int his thread as well, but if you would all go and check this just to make sure I haven't made an obvious mistakes that would probably be safest.
And again, if anyone has any more questions then please feel free to ask.
Andrew.
Edit:
I forgot to link to teh WIKI page. Doh :cannotbe:
http://www.diyaudio.com/wiki/index....fier+Components |
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| fcel |
| Should we forget about the other wiki thread where some of us has ordered component kits but only the boards were ordered? We're still talking about the same thing, right? |
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| bigparsnip |
| Yes, these are the kits for the boards I'm getting made, the price is a little different from how I had initialy thought (should still be under £11.00 though for a full board) but the components are pretty much the same. I decided to strat a new thread so that the old one didn't get too cloged up and have two disscussion topics going at once, so this one if for the components and the other is just for the boards now. |
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| Michi124 |
I called Fischer today (finally), and the SK 104 50,8 STS (the one with the mounting holes) turned out to be readily available for
€ 0,94 each (250 off) or
€ 0,80 each (500 off).
Yes, this does include VAT.
Andrew can get them in less than a week after he decides to order. |
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| bigparsnip |
Hi, so (correct me if I'm wrong here), but as the VAT is being paid at source in germany, there will be no extra VAT or duty charged on the package when it arrives in the UK right?
If this is the case, it should nock about 10-15p per heatsink off the current best price I have found and so the price for four heatsinks woud go down to £3.00 - £3.20 (probably closer to £3.00 if the 16.50 euros for shipping is correct). I guess I wikk have to check out at teh post office what the isues are with importing them to the UK and then I will get back to you (coulomb this means that these will probably work out cheeper than the parts from digikey after all of the extra tax and postage, but thanks fo offering anyway).
It also looks like there is definately enough intrest ot go ahead witht he diodes now, so anyone who wasn't sure if they would be getting ordered, they should almost certinaly be now.
andrew. |
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| Coulomb |
No worries mate.
Anthony |
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| Michi124 |
Yes of course, no extra charges or taxes.
There must be SOME good things about the EU, right?
I was also told the weight of those sinks, which is not in the datasheet: they are 21,5 g each.
This means, 250 of them are already above 5 kg, which raises postage to € 20,50.
Still a good deal... |
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| bigparsnip |
Yes, that is about what I found when I weighd one at work (that was about 22g on our scales), but that should still be a decent price, especialy with the shorter lead times. Once the deadline for the order has passed (the 11th of march) I will get in touch with you to organise the final number needed and how you would like me to send the payment on.
Andrew |
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| jonclancy |
... cos I really was hoping to get the SK104s! :D
Good news about the diodes, too - SinEra missed out on the UK Reichelt order.
When was the order deadline??? 11 April?
I'll just have to look on the WIKI!!
Cheers
Jon :) |
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| jonclancy |
Been there - 11 Apr it is.
STS are the solderpin version of the sink. Do you just solder them to the board or is there a connection to earth? Unless you have a space issue, would it be easier to use the M3 threaded version (STSB)?
Just wondering..
Cheers
Jon |
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| bigparsnip |
When I designed the board I had intended to use the solder pin versions of the SK104 from Fischer. On the data sheet from fischer, it stated a pin size of 2.3mm max, so I had the holes on the board drilled out to 2.5mm (this will be a little smaller once they have been plated through), which is the only reason I was unsure of the parts from digikey (these are aavid parts, exactly the same in the boddy, but with slightly larger PCB pins which may have not fit into the holes on the board).
Basicaly what you wil need to do for assembly, is to bolt your diode to the heatsink, insert both into the board (you won't need to insulate the diode from the heatsink as the pins have no electrical conection) and solder up the diode legs as well as the pins to hold the sink and diode in place.
As far as the version with the M3 nuts goes - the holes in the PCB would be too small for this as again, I hadn't intended the board to be used with them. |
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| bigparsnip |
| Michi, it looks like the order for heatsinks has gone well past 250 now and I was just wondering if Fischer had any sort of order multiple I will need to order in, or if any number can be submited for the order. If you know anything about this now, it would be great to know, but if not don't worry too much about finding out just yet. |
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| Michi124 |
No, I can't find anything in their catalogue about order multiples, not even in the fine print ;)
But I can still ask anytime...
Anyway, there should be some more people on diyaudio who have use for these diodes and heatsinks, apart from us who ordered your pcb.
It might be a good idea to tell other members in other threads about this opportunity, the way Rodd Yamashita did with his Cardas group buy.
Or is that considered offensive? |
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| jonclancy |
......... now I understand!! :D
Would you need to use a sil-pad to isolate the diode from the sink????
Sorry, daft question, but no-one has asked it yet. :rolleyes:
Cheers
Jon :) |
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| bigparsnip |
No, you don't need to isolate the diode from the heatsink (although you can if you want) as the pins are not conected to anything in the circuit (however, you won't want any part of you casing to touch the diodes, or allow the heatsinks to come into cotact with each other as that may cause problems).
I have just put one together now using some parts I have in my little tin (and some heatsinks from work), using only a bit of thermal paste between the diode and heatsink. But everything seems to fit together ok (although actualy putting cables onto the two terminal lugs in the centre of the board is a little snugg once the heatsinks are on the board too).
Hopefully I will be bale to scrounge a cammer from someone tonight and post a few decent pictures up of the bare boards nad the whole thing once finished.
edit:
One more thing that I have noticed is that the heatsinks seem rather well attached with only th diode legs soldered, so you may not even have to solder the pin in for things to work (depending on how safe you like to be) |
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| jonclancy |
Cheers Andrew.
I'll probably go with the pads anyway - to avoid any chance of :hot: .
Jon ;) |
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| bigparsnip |
| Some good news, as there are a fair number of kits being ordered now, it looks like I should be able to drop the price of the four diodes down to £5.40 instead of the £6.20 I had initialy put up on the WIKI page (there is also still a possibility that the price may even come down further still if we can get to the next price break at 500) |
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| Coulomb |
| quote: | Originally posted by bigparsnip
Some good news, as there are a fair number of kits being ordered now, it looks like I should be able to drop the price of the four diodes down to £5.40 instead of the £6.20 I had initialy put up on the WIKI page (there is also still a possibility that the price may even come down further still if we can get to the next price break at 500) |
I never realized how expensive components can be in Europe Andrew. 4 of those Diodes BYW99P-200 would be the equivalent of $4.60 UK for quantity 250, for 500 the price would be $4.25 UK.
Now if only there was away to ship overseas that was cost effective.
Regards
Anthony |
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| bigparsnip |
Yep, you're quite luckey being right next door to america (in fact that is where I will be getting these ones form, just a shame I have to pay import duty, tax and shipping on them or they would probably be - if not cheeper - the same price you have there).
But, that's global capitalism for you - charge only what you know people will pay (and we dont' have enough choice over here to do much about it :( ). |
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| Coulomb |
| quote: | Originally posted by bigparsnip
Yep, you're quite luckey being right next door to america (in fact that is where I will be getting these ones form, just a shame I have to pay import duty, tax and shipping on them or they would probably be - if not cheeper - the same price you have there).
But, that's global capitalism for you - charge only what you know people will pay (and we dont' have enough choice over here to do much about it :( ). |
Your price includes all taxes, duties and shipping Andrew?
Anthony |
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| Coulomb |
| quote: | Originally posted by Coulomb
Your price includes all taxes, duties and shipping Andrew?
Anthony |
If I were you I would go for this product Andrew from Ixys, it is the cadillac of Fred's for much cheaper than the generic ST part. I have attached the PDF file as well. It is available from Digikey America for the equivalent of $0.80 UK ea. that's $3.20 UK for four and it is a 37 Amp device.
Digikey part number is DSEI30-06A-ND
Description DIODE FRED 600V 37A TO-247AD
If you go for 500 it gets even cheaper.
Regards
Anthony |
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| bigparsnip |
| To the point I send them out, and I have been trying to mark the customs forms as samples so people shouldn't have any extr when they turn up in thier own country (hopefuly yours should be there in less than a week now, it went out today). I did think about the ones that we found here in the UK for about £0.91 from a distributor, but they had aminimum order quantity of 600, and a lead time of 15 weeks! So in the end I decided this would be a better route, as people may get their parts some time this year. |
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| Coulomb |
| quote: | Originally posted by Coulomb
If I were you I would go for this product Andrew from Ixys, it is the cadillac of Fred's for much cheaper than the generic ST part. I have attached the PDF file as well. It is available from Digikey America for the equivalent of $0.80 UK ea. that's $3.20 UK for four and it is a 37 Amp device.
Digikey part number is DSEI30-06A-ND
Description DIODE FRED 600V 37A TO-247AD
If you go for 500 it gets even cheaper.
Regards
Anthony |
Better yet they are available from Digikey in the UK........
At the same price!!!!
Anthony |
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| Coulomb |
| quote: | Originally posted by Coulomb
Better yet they are available for Digikey in the UK........
At the same price!!!!
Anthony |
And they have Stock
Minimum order is only 30!!! |
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| bigparsnip |
Just got back from tea nad had a look at teh data sheet, and there is one huge problem, they are only two legged TO-247 devices.
Whilst I designed the board so that it could accept a standard two leged TO-220 device like the MUR860, the only TO-247 devices that will fit into it are the dual diode, three legged types like the BYW99W-200's, so in htis case these ones won't work in the circuit boards.
Edit: they also have a rather hige voltage drop of about 1.5V compared to the 0.8-0.9V for the ones I was going to go for, so they will heet up a lot more quickly at higher currents. |
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| Coulomb |
| quote: | Originally posted by bigparsnip
Just got back from tea nad had a look at teh data sheet, and there is one huge problem, they are only two legged TO-247 devices.
Whilst I designed the board so that it could accept a standard two leged TO-220 device like the MUR860, the only TO-247 devices that will fit into it are the dual diode, three legged types like the BYW99W-200's, so in htis case these ones won't work in the circuit boards. |
Oh dear, When I asked about the HFA FREDs from IRF you said they would work. They are two legged TO-247 devices as well and that is what I already have 50 of.
This is the device I have.
http://www.irf.com/product-info/dat.../hfa30pa60c.pdf
Anthony |
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| bigparsnip |
| Are you sure that is only a two legged device, on the front page of teh data sheet it clearly shows a package with three legs, and says it contains two diodes sharing a common terminal (again, three legs). So, if the devices you do have are the ones on the data sheet then they should indeed work with the board. |
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| Coulomb |
| quote: | Originally posted by bigparsnip
Are you sure that is only a two legged device, on the front page of teh data sheet it clearly shows a package with three legs, and says it contains two diodes sharing a common terminal (again, three legs). So, if the devices you do have are the ones on the data sheet then they should indeed work with the board. |
Sorry Andrew, that spec sheet is for an alternate I can get if I have to. Here is the spec sheet for the ones I have in stock.
http://www.irf.com/product-info/dat...a/hfa25pb60.pdf |
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| bigparsnip |
If those are indeed the ones you have now then I'm affraid whilst they would solder into the boards they wouldn't actualy make up a functioning rectifier, as on the boards the centre pin (on TO-247 cases) is the common Cathode pin, and the outer two are the individual Anode pins.
I didn't realise when you first asked back in the main thread that you were refering to the devices with two pins in a TO-247 case (I hadn't actualy come accross any back then) as you didn't specify the actual part number of the diodes. And although I may not have been entirely clear in my repply stating that the devices would need to be three pin for TO-247, and two pin for TO-220 this is definately the case (hence the reason for having the three pads for the larger devices). I thought it should be clear from the fact that the BYW99W-200 device has three legs, and a pin out that isn't compatable with the two pin devices. I appologise for any inconvenience this may have caused, and if there is anything that you feel I could do to help you out with this plese drop me an e-mail and I will se what I can do to help you out.
Andrew. |
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| bigparsnip |
Yes, those MUR3020's should work fine in the PCB (in fact, they are the type I have soldered into the first couple of boards to do some tests with - not that I have actualy conected them up to anything yet) as they have the two diodes in the one TO-247 package.
If these are cheeper for you to get, and you are happy with these ones compared to the BYW99W-200 that are used in the PASS Labs equipment then you should be able to get some and pop them into your boards when they turn up. Hopefuly I should be able to get to listen to the two different sets eventualy as well to see which are better. Although again, these will get a little hotter than the ones I am trying to order as they again have a higher voltage drop in opperation, so you may want to keep an eye on that if you are running them close to their limits. |
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| Coulomb |
| quote: | Originally posted by bigparsnip
Yes, those MUR3020's should work fine in the PCB (in fact, they are the type I have soldered into the first couple of boards to do some tests with - not that I have actualy conected them up to anything yet) as they have the two diodes in the one TO-247 package.
If these are cheeper for you to get, and you are happy with these ones compared to the BYW99W-200 that are used in the PASS Labs equipment then you should be able to get some and pop them into your boards when they turn up. Hopefuly I should be able to get to listen to the two different sets eventualy as well to see which are better. Although again, these will get a little hotter than the ones I am trying to order as they again have a higher voltage drop in opperation, so you may want to keep an eye on that if you are running them close to their limits. |
Arrggghhh this sucks!!!
Actually, the Vf looks to be the same on the MUR3020 as the BYW99 part.
Regards
Anthony |
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| Coulomb |
Would there be an apparent advantage of a 3 pin device over a 2 pin device?
Anthony |
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| bigparsnip |
Well it will fit in the board :xeye:
the main reasoning behind going for the BYW99 types was simply that these are what are supposed to be used in the real thing, so I figured if you are going to spend this much on a rectifier you might as well try and do it properly. If other people want to go a different route then it is quite possible for them to do so as (hopefully) the board is reasonabley flexible when it comes to component choice (this being un unfortunate reminder that you can't always be 100% compatable though).
also with regards to the voltage drop, I think you are probably right here, as I went back to the data sheet for the BYW99's and the 0.8V I was thinking of was for 12A per diode at 125 degrees, rather than any of the values mentioned on the MUR3020 data sheet (and I wouldn't want to make much of a comment from the graphs, although it might just be the MUR3020 is a smidge lower around there anyway).
Anyway, I would appreciate it if you could send me any more questions directly *** this is tking the thread a little off topic now. |
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| Coulomb |
| Sorry, I did not mean to clog up your thread. |
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| bigparsnip |
Ok, wouild anyone here object to me closing the order before I said I would this weekend, so that I can collect paymnet the following week and place the orders for the components early? As, I think I might be able to just squeeze this in before my exams if I can get most of the payments by the midle of next week and get the orders for the components in then too. If you have any oppinions one way or the other, I would appreciate if you would tell me here.
Andrew. |
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| jonclancy |
Happy with that, BP.
Jon :) |
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| bigparsnip |
OK, unless anyone complains at me between now and sunday, I will be shutting the order down at 2300 GMT on sunday the 4th of April. I will need all payments to be made by Sunday the 11th of April as well, so I can try and get this done before my exams start. But hopefully this will be a good thing for you all as well, as it will mean getting your components more quickly.
One other good thing is the fianl prices of the kits, which have come down a fair bit from the costs given on the first page of this thread. The final costs of the kits will now be:
Kit 1: £5.40
Kit 2: £3.20
Kit 3: £1.10
So the total to populate one board will be just under £10. I will work out the postage for everyone seperately and send you all out individual e-mails with the final cost for the components and the extra postage for those who have already payed a part allong with their PCB payment.
Andrew |
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| Michi124 |
Right now, 444 heatsinks are being ordered. The supplier's next price break is at 500, and it's already cheaper to order this amount:
444 x 0,94 = 417,36
500 x 0,80 = 400,00 (all prices in €)
Another issue:
Looking at the photos of Andrew's and Anthony's finished boards, it might be a good idea to insulate the diodes from the sinks.
Sil-pads will certainly do, but Fischer also offers Kapton washers (thermal res. 0,07 K/W),
which should go very well with your IRFP044/240 (any Aleph-X builders out there?) :cool:
Pricing is 0,41 € each (100 off)
Please check for the prices in the UK. In case you're interested, we could expand the wiki for this item.
Shipping is no problem, since I order the heatsinks there anyway. |
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| bigparsnip |
So, for the heatsink thing we would end up with aboout 50 'free' heatsinks. What do you think would be the best thing to do with these though, as I'm not sure I would ever need them all (it may be possible to send them out to anyone willing to pay a little bit extra postage I suppose)? But, anyway, it would seem daft not to do that now, even if they doo just sit in someones parts box waiting to be used up.
As for the Kapton washers, I guess I would probably be intrested in a few, as that is by far the best price I have seen for that standard of washer over here (I think RS wanted to charge over a pund each just for a sillpad for a TO-247). But, I wouldn't need anywhere neer 100, so I guess that would also depend on what other people want to do as well (I guess probably around 30-50 wouild be good for me right now). |
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| Michi124 |
In case you are interested, please visit the wiki and add your requirements for TO-247 Kapton washers.
I started with fifty for myself. It shouldn't be too difficult to reach 100 then ;) |
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| richie00boy |
| Sorry, I just scanned through the thread so may have missed it, but are these heatsinks the same as Maplin RN82D? If so what price are you looking for? I'm interested in a few. |
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| bigparsnip |
Yep, these are the same type as the maplin ones. At the moment, the price is £3.20 for four (including the nuts and Bolts you need to mount a diode or transistor on them), but if you want to order in different numbers that's fine too. And if we get another few orders (500 sinks minimum), the price will drop down closer to £2.80 for four (which would be nice). If you do want some if you go to the WIKI page below and just add on how many of teh heatsinks you want in the comments field that will be fine.
Andrew
http://www.diyaudio.com/wiki/index....fier+Components |
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| SvErD |
| quote: | Originally posted by Michi124
Sil-pads will certainly do, but Fischer also offers Kapton washers (thermal res. 0,07 K/W),
which should go very well with your IRFP044/240 (any Aleph-X builders out there?) |
Michi, would it be possible to get Kapton sheet aswell. I need it in my Aleph 2's were I plan to mount the transistor directly on 10x40x50mm copper blocks. I have silicone sheet to use between the copper blocks and the heatsink, but the Kapton has much lower thermal res.
Cheers
Svein |
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| Michi124 |
Svein,
yes, Fischer offers this as well, but be prepared for their price:
€ 99,76 for a sheet of 1000 x 305 mm.
Anybody else out there who wants to share?
Please also check their datasheet of these Kapton washers:
http://www.fischerelektronik.de/_20...el_PDF/E_12.pdf
[seems not to be available right now] :scratch: |
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| SvErD |
| quote: | Originally posted by Michi124
Svein,
yes, Fischer offers this as well, but be prepared for their price:
€ 99,76 for a sheet of 1000 x 305 mm.
Anybody else out there who wants to share? |
Anyone else intrested? I need about 1/4 of the sheet (250 x 305 mm)
Svein |
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| bigparsnip |
Hi, just a reminder, that I will be closing down the main order WIKI for this at midnight tonihgt, so if there is anyone out theree still who wants to sign down you had better do this soon.
Also, I should be sending an e-mail out to you all regarding the final costs for everyting, as I would like to try and get most of th money in this week so that I can place the order nice and early.
andrew. |
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| bigparsnip |
OK, hopefuly everyone should have an email from me with their final orders and costs in now, hopefuly there aren't any mistakes, but if you do find any or want to make any changes just send me a replie and I will get back to you as soon as I can (which my be a day or two now, as I'm away from my PC for a bit). But, if there are no problems I would appreciate it if people could get the payments in as soon as possible now so we can get this finished and parts shipped out to you as quickly as possible.
Andrew (hoping he didn't make too many mistakes in the e-mails) |
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| bigparsnip |
Right, I have had about two thirds of the money for the order now, so I have placed the order for the diodes, and sent of a final order number for the heatsinks and kapton washers to Michi124 so that we can get that order sorted out as soon as possible too.
If you haven't payed yet, please get in touch (even if is just to say you need a bit more time) or make the payment, so that I know I'm safe to go ahead and order the rest of the components.
Andrew |
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| bigparsnip |
| OK, the diodes turned up today, the order with Fischer should hopefuly be underway now, and I will be ordring the rest of the bits as soon as I get enough money from the people who are still to pay (only one or two now though) for their components. |
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| jonclancy |
... just look at 'em!
:cool:
Jon :D |
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| Michi124 |
Andrew supplied me with the final order number for heatsinks and kapton washers and so I placed the order.
All items are readily available, a friend of mine will pick everything up (after payment is made) and send it to Andrew.
He can expect delivery end of next week.:nod: |
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| bigparsnip |
If I ever try and do another group buy, will someone please stop me from buying flat-pack cardboard boxes to send stuff out in (or at least remind me to buy a tape gun).
My poor hands...:bawling: |
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| Magura |
LOL, I can easily imagine what youve been through......I had the entire flat covered in padded envelopes and taps for about 2 weeks. Lets put it like this, my wife was not impressed with my level of order in the livingroom :D
Magura:) |
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| bigparsnip |
| Well, I guess that is one good thing, as it's only me here at the moment to have to put up with this (and it isn't too much worse than normal). |
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| Magura |
| quote: | Originally posted by bigparsnip
(and it isn't too much worse than normal). |
That sounds like me 10 years ago ;)
Magura:) |
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| bigparsnip |
Well, some good news, I recieved the heatsinks from Fischer thismorning (thanks to Michi124 and friend for their help on this one) so I should be able to finish putting together most peoples parcels tomorrow afternoon when my exam finishs (half a day off woo!) and get most of them sent out on thursday, as long as I don't need to fill in the big customs forms because of sending small boxes rather than envolopes.
Andrew.
edit:
Almost forgot: |
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| roddyama |
Hi Andrew,
That looks like an infestation. You need an exterminator. |
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| Michi124 |
Andrew seems to be obsessed with spreading things out on the floor as wide as possible. :D
Initially, the heatsinks were shipped in nice packs of ten...
I'm glad the sinks arrived finally... There was a two day delay when my friend in Luedenscheid
didn't even find time for a lunchbreak to pick the order up.
In general, ordering from Fischer proved to be quite simple.
I have a customer registration now and don't mind running other orders for the community. |
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| bigparsnip |
| Actualy they turned up in two boxes like that (about 200 in each), I guess all the ones you got were in 10's as they must only come in packs of 10 or 200 (not that it's important at all). |
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| bigparsnip |
OK, I have just been to the post offfice and sent out the first lot of packages, so if you are one of the lucky ones below your kits should be with you soon:
Kelly McDonnald
Michi124
Bertram (your parts are in the packaget to michi124, as he will be sending them on, allong with your heatsinks when he recieves the rest of the bits)
JonClancey
SvErD
SuppersReady
Gaber
NielS
I still have to finish taping up the boxes for the rest of you, and I will try and get back down to the post office before it closes today (although, I may not be able to carry all of the boxes again, so some may go tomorrow) with another lot. But I will let you know again, when the next lot have been sent. |
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| pooge |
| For my information, what model # and brand did you use for the heatsink? I bought the bare boards, and need to know what to use that fits the boards. |
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| bigparsnip |
Hi, if you look back through the main thread you should see that I designed the boards with the Fischer SK104 heatsinks in mind (data sheet ).
You should be able to find a number of compatable ones, but before you buy them make sure to check that the pins on the bottom of the legs will fit into the holes (these were drilled out to 2.5mm then plated, so they will be around 2.4mm in diameter), as some of the aavid ones don't fit in properly. |
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| bigparsnip |
Hi, judging from those data sheets, it looks like you should be fine using either of those with the boards.
No, unfortunatly, by the time I had finished the rest of the packages I had mised the shutting time for the post office today, but I will be off down there in the morining with almost everyone's packages who is not ont he list above. |
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