Working fine for me... though the BOM now seems to be missing several components that were there a few hours ago...
Are edits recursive back to the master list? i.e. changes you make reflected back to my copy? otherwise how to explain the missing parts...
when in doubt import the following into mouser BOM utility...
71-CMF5547R500FHEK|2
71-CMF551K0000FHEK|2
71-CMF552K2100FHEK|4
271-110K-RC|2
271-768K-RC|2
791-RC1/4-683JB|2
791-RC1/4-470JB|2
71-CMF55221R00FHEK|4
71-CMF5530K100FHEK|8
71-CMF552K2100FHEK|8
271-75K-RC|4
791-RC1/4-470JB|4
598-CD15FA102FO3F|8
505-M102.2/250/10|2
647-UKW1E102MPD|4
647-UKW1E101MED|16
647-UKW1E101MED|8
595-OPA27GP|8
512-BD13516S|2
512-BD13616S|2
575-11043308|8
Are edits recursive back to the master list? i.e. changes you make reflected back to my copy? otherwise how to explain the missing parts...
when in doubt import the following into mouser BOM utility...
71-CMF5547R500FHEK|2
71-CMF551K0000FHEK|2
71-CMF552K2100FHEK|4
271-110K-RC|2
271-768K-RC|2
791-RC1/4-683JB|2
791-RC1/4-470JB|2
71-CMF55221R00FHEK|4
71-CMF5530K100FHEK|8
71-CMF552K2100FHEK|8
271-75K-RC|4
791-RC1/4-470JB|4
598-CD15FA102FO3F|8
505-M102.2/250/10|2
647-UKW1E102MPD|4
647-UKW1E101MED|16
647-UKW1E101MED|8
595-OPA27GP|8
512-BD13516S|2
512-BD13616S|2
575-11043308|8
I have had some pretty strange results using the mouser BOM facility. I just can't remember right now exactly what happened but I think I ended up missing some parts that I definitely had added to the BOM in question. I think when I then actually went and ordered some of the parts were missing from the shopping cart.
Best to always double check both the shopping cart and the quantities for each item.
Fran
Best to always double check both the shopping cart and the quantities for each item.
Fran
Strange... I can only connect to Mouser via a proxy server, and some functions do not work properly.
But it seems that changes made to the BOM are saved.
Here is what I have:
PhonoClone 3 @ Mouser
Note that almost all quantities are doubled, just in case. I have not included the transformers, as I have a local source for those.
But it seems several items are backordered, like the 110KOhm resistors and the 47Ohms carbon resistors. I guess I'll wait for them to come back in stock.
But it seems that changes made to the BOM are saved.
Here is what I have:
PhonoClone 3 @ Mouser
Note that almost all quantities are doubled, just in case. I have not included the transformers, as I have a local source for those.
But it seems several items are backordered, like the 110KOhm resistors and the 47Ohms carbon resistors. I guess I'll wait for them to come back in stock.
Backordered items must be treated with care, as you are charged a substantive fee at Mouser .. an incentive to find a replacement or as you say, wait until they are back in stock (and nothing else is backordered then...)
I suggest finding a replacement for the resistors, Mouser has carbon comp from a variety of sources, and carbon film is also satisfactory. Any 1/4 w type should fit.
Likewise for the metal film, if one brand is out, look for a substitute in another brand or a close value. There will surely be something.
I suggest finding a replacement for the resistors, Mouser has carbon comp from a variety of sources, and carbon film is also satisfactory. Any 1/4 w type should fit.
Likewise for the metal film, if one brand is out, look for a substitute in another brand or a close value. There will surely be something.
Finally, my pc3 is back!
I've bought a new transformer (100 V/A) and rebuild the psu with this one and w/o the thermal sheets, as suggested.
Plenty of space, now. All was easier: it works.
I've used a screw for the rectifiers ( thanks FinnC ), and except for this (and for the single toroid), everything is the same as the last time.
It's too early to say something about the sound, for the moment it's a little too sharp ( but it's going better day by day ).
One question:
The guy of the shop where I've bought the new transformer, says that a big one is better than two of half power, because they're never exactly the same.(?)
I've always heard the opposite, what is the true ( almost for the phonoclone) ?
Thanks a lot to everybody for the precious help.
Giuseppe
I've bought a new transformer (100 V/A) and rebuild the psu with this one and w/o the thermal sheets, as suggested.
Plenty of space, now. All was easier: it works.
I've used a screw for the rectifiers ( thanks FinnC ), and except for this (and for the single toroid), everything is the same as the last time.
It's too early to say something about the sound, for the moment it's a little too sharp ( but it's going better day by day ).
One question:
The guy of the shop where I've bought the new transformer, says that a big one is better than two of half power, because they're never exactly the same.(?)
I've always heard the opposite, what is the true ( almost for the phonoclone) ?
Thanks a lot to everybody for the precious help.
Giuseppe
Glad you got it sorted out.
The guy in the store was giving you good advice. Generally a single larger transformer is better than two separate ones. A 100 VA toroid, for example, will have better load regulation, less leakage current, and cost less than two 50 VA toroids. The only point it loses is channel separation, and the grounding issues related to having the COM signal of both channels tied up together in the power supply.
I recommend the smaller Telama toroids because they are available, stocked, from a major retailer (Digikey), because they are quite good value for money, and because they are convenient as I can recommend a single part and say "use two if you want dual mono".
Looking through the Digikey catalog (p2440-2441), the 35VA 62072 is $34 and the 50VA 62082 is $41. Recently some new options have been added I notice. There is a 95 VA TE50952012-ND at $77, and a new "audio"grade 100VA TE60103-ND at $70.
All these are are about $1 per VA, and all would be fine. Whether 2x50VA would be better than 1x100VA in this instance I really don't know. Of course there is also 2x100VA to consider!
For the record I've always used a single large transformer, not dual mono.
The guy in the store was giving you good advice. Generally a single larger transformer is better than two separate ones. A 100 VA toroid, for example, will have better load regulation, less leakage current, and cost less than two 50 VA toroids. The only point it loses is channel separation, and the grounding issues related to having the COM signal of both channels tied up together in the power supply.
I recommend the smaller Telama toroids because they are available, stocked, from a major retailer (Digikey), because they are quite good value for money, and because they are convenient as I can recommend a single part and say "use two if you want dual mono".
Looking through the Digikey catalog (p2440-2441), the 35VA 62072 is $34 and the 50VA 62082 is $41. Recently some new options have been added I notice. There is a 95 VA TE50952012-ND at $77, and a new "audio"grade 100VA TE60103-ND at $70.
All these are are about $1 per VA, and all would be fine. Whether 2x50VA would be better than 1x100VA in this instance I really don't know. Of course there is also 2x100VA to consider!
For the record I've always used a single large transformer, not dual mono.
Built a set this evening ...
The Mouser BOM got me all the parts I needed, though I used the Arcotronics I have here for C3 everything else came from Mouser... so it works. For the record I spaced out and mixed up R1 and R2 when soldering the components, but dug my way out of that hole without serious problems. I noticed that Q1 and Q2 are really hard to tell front from back... the front is the sightly short side of the trapazoid body, and this is indicated on the silkscreen...
The gold pins on the input and output pads and scattered in the forground are made by Sunhayato and bought locally. The product page is here. FWIW it does say they will ship internationally.
An externally hosted image should be here but it was not working when we last tested it.
The Mouser BOM got me all the parts I needed, though I used the Arcotronics I have here for C3 everything else came from Mouser... so it works. For the record I spaced out and mixed up R1 and R2 when soldering the components, but dug my way out of that hole without serious problems. I noticed that Q1 and Q2 are really hard to tell front from back... the front is the sightly short side of the trapazoid body, and this is indicated on the silkscreen...
The gold pins on the input and output pads and scattered in the forground are made by Sunhayato and bought locally. The product page is here. FWIW it does say they will ship internationally.
Hi Rjm,
following one of your previous BOM, I got from Mouser 598-CD15FA102FO3F Mica caps for C1 and C2 of my pc32e board (listed in post #565). They are rated 100V and are a little bit smaller than the spaces in your pcb.
In your picture above I saw well fitted Mica caps and I found that your last BOM you propose different ones (598-CD19FD102FO3F). It seems they have the same specs, just rated 500V.
I do not think the size is a problem. Can I use the Mica caps I already bought from Mouser?
Renato
following one of your previous BOM, I got from Mouser 598-CD15FA102FO3F Mica caps for C1 and C2 of my pc32e board (listed in post #565). They are rated 100V and are a little bit smaller than the spaces in your pcb.
In your picture above I saw well fitted Mica caps and I found that your last BOM you propose different ones (598-CD19FD102FO3F). It seems they have the same specs, just rated 500V.
I do not think the size is a problem. Can I use the Mica caps I already bought from Mouser?
Renato
There are 100V and 500V-rated Cornell-Dubilier mica caps. Both will fit in the boards. The thing is, at Mouser anyway, the 500V model is cheaper than then 100V model! At least for the 1% values I decided to use (the yellow ones in the photo).
There are 16 useable options of mica 1000pF capacitor to choose from at Mouser, ranging in price from under $2 to over $15 each. The cheapest is the non-RoHS 500V 5% part, 5982-19-500V1000. Next cheapest is the RoHS 500V 5% part, 598-CD19FD102JO3F.
Looking at RoHS only, the pricing goes 500V 5% ($2.32ea.), 100V 5% ($2.52ea) and 500V 1% (3.04 ea.).
To be honest I only discovered the pricing anomaly recently, because I was just searching for only the 100V parts before, naturally assuming they were the cheapest.
By the way: the mica caps I sell on the website are 100V 5%.
The tricky bit is how to update the BOM, 1% or 5% parts?
There are 16 useable options of mica 1000pF capacitor to choose from at Mouser, ranging in price from under $2 to over $15 each. The cheapest is the non-RoHS 500V 5% part, 5982-19-500V1000. Next cheapest is the RoHS 500V 5% part, 598-CD19FD102JO3F.
Looking at RoHS only, the pricing goes 500V 5% ($2.32ea.), 100V 5% ($2.52ea) and 500V 1% (3.04 ea.).
To be honest I only discovered the pricing anomaly recently, because I was just searching for only the 100V parts before, naturally assuming they were the cheapest.
By the way: the mica caps I sell on the website are 100V 5%.
The tricky bit is how to update the BOM, 1% or 5% parts?
kffern said:
Use the pair closest to 1000 for C1, and set the C2 banks of each channel so that the total sums to as evenly as possible.
So the two 997s for C1, and 996, 978, 990 for one channel, 992, 982, 987 for the other. i.e. as you would have done it just maybe not for the exact same reason.
I'm not sure what you were expecting, but those are I would say really good set considering the spread could be expected to vary from 950 to 1050 pF... all but two are <1%, one is 1.3% and the other is 2.2%!
So...
Mouser is out of the suggested 1000uF/25V capacitors. The BOM specifies UKW, but Mouser only has UKT, UFW, and UKZ, the latter being the most expensive of the bunch.
Would either of the three options work, or should I wait for the UKW?
Also, Mouser is out of Kamaya carbon comps... would Ohmite be a good replacement?
Mouser is out of the suggested 1000uF/25V capacitors. The BOM specifies UKW, but Mouser only has UKT, UFW, and UKZ, the latter being the most expensive of the bunch.
Would either of the three options work, or should I wait for the UKW?
Also, Mouser is out of Kamaya carbon comps... would Ohmite be a good replacement?
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