@PMI,
The Faston tab 1217136-1 comes in strip packaging right?it is a bit hard to separate without good sharp edged pliers,so could you change it in the main BOM to bulk packaging parts or loose piece parts?
Moreover,i ordered them from digikey who rolled up the strip very carelessly and i spent a good 45 minutes straightening out the tabs and their pins.most of the pins were a lost cause because they were bent badly.
I have lots of faston 62409-1 tabs,which dont fit(too thick legs).(bulk package)
i find 1217167-1 and 1217421-1 come as loose piece.will try these with the next order
No one has had this issue so far,but,at two in the night,and being forced to sleep out on the couch,it is a bit frustrating to be not able to fire it up.
The Faston tab 1217136-1 comes in strip packaging right?it is a bit hard to separate without good sharp edged pliers,so could you change it in the main BOM to bulk packaging parts or loose piece parts?
Moreover,i ordered them from digikey who rolled up the strip very carelessly and i spent a good 45 minutes straightening out the tabs and their pins.most of the pins were a lost cause because they were bent badly.
I have lots of faston 62409-1 tabs,which dont fit(too thick legs).(bulk package)
i find 1217167-1 and 1217421-1 come as loose piece.will try these with the next order
No one has had this issue so far,but,at two in the night,and being forced to sleep out on the couch,it is a bit frustrating to be not able to fire it up.
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Good point, I will look up those part numbers. You are correct, mine come on a strip, but in the past they have come on a small plastic reel, and in a padded envelope.
You should be able to grasp them from the end of the strip, using pliers, one at a time, and bend back and forth until they snap off. Making a small score or scratch with any sharp tool helps.
My problem in the past has been retension in the holes while soldering. The pins are often too loose, or too tight, in theory they should be press-fit. Too tight, means hard to insert without a power tool, too loose, and they shift while soldering.
If anyone has any other comments on parts or assembly, please post, thank you,
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Sounds like that is a better part than the one I have on the strip then...
A press-fit on the TH VSSA boards, or on the Cap Multiplier boards? The legs are rectangular and tapered, so in theory at least, as they seat with the curved stops against the board, the edges of the legs should bite in, and the tab should stay in place, and straight, for soldering.
A press fit on the Cap Multi Boards. The VSSA comes with them already installed. Also as i said, they are a Very Tight Fit on the Cap Multi boards & some might not like that. Takes a lot of Finger Force to Fully Seat them.! So Maybe not so good.? Also they are a bit taller than the ones you Specified, by approx. 1/8"
Attachments
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Thanks for the photos Rick G.I have those parts.
I used a nipper/ Flush cutter that is used to trim component leads off to separate the remaining tabs from the strip.Does the job neatly though it sends the pieces flying which is quite dangerous to self and anyone around.does the trick and i guess everyone uses one.
I used a nipper/ Flush cutter that is used to trim component leads off to separate the remaining tabs from the strip.Does the job neatly though it sends the pieces flying which is quite dangerous to self and anyone around.does the trick and i guess everyone uses one.
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PCB Status & Requests
Except for a couple sets being held by request, the remaining boards with transistor kits were sent out last week.
Counting spares and two sets not claimed, there are about 16 boards left, and recent requests for about 30. There are not quite enough to send out much more than 2 each, until there is enough interest to make another order, but I plan to send sets of two first to anyone not included in the last order.
There have been a few component questions, and I will post some notes on assembly, and on alternative parts as quickly as I can, later this week.
Except for a couple sets being held by request, the remaining boards with transistor kits were sent out last week.
Counting spares and two sets not claimed, there are about 16 boards left, and recent requests for about 30. There are not quite enough to send out much more than 2 each, until there is enough interest to make another order, but I plan to send sets of two first to anyone not included in the last order.
There have been a few component questions, and I will post some notes on assembly, and on alternative parts as quickly as I can, later this week.
Yes, I have been a bit short on time, but I am planning on it.Are you going to do anything Group Buy? I'm in for Four (4) PCB's. Let us
know. Thanks for all the hard work. Take care.
A belated thanks Pete for the last set of brds and the components - they arrived safely last week all organised in nicely done neat packages - much appreciated indeed.
I must add that it's great to see that this particular CMx not only works really well but we've gone from 'acceptance' of the cct -> component layout changes in the pcb in just one version of the design, after sitting in 'limbo' for a couple of years on Miles' website!
Next stage will be the performance variations (sounds) with different components as it gets included in a wider variety of power supplies for different uses (amps, preamps, buffer, etc)
I have used the basic C multiplier power fet cct, with good success, for years and have accepted the approx. 10 volt rail drop as part of the price, but this cct of Miles and the lower current one of 'kean's' (kmultiplier) are certainly 'game-changers' for power supplies everywhere, IMHO.
I must add that it's great to see that this particular CMx not only works really well but we've gone from 'acceptance' of the cct -> component layout changes in the pcb in just one version of the design, after sitting in 'limbo' for a couple of years on Miles' website!
Next stage will be the performance variations (sounds) with different components as it gets included in a wider variety of power supplies for different uses (amps, preamps, buffer, etc)
I have used the basic C multiplier power fet cct, with good success, for years and have accepted the approx. 10 volt rail drop as part of the price, but this cct of Miles and the lower current one of 'kean's' (kmultiplier) are certainly 'game-changers' for power supplies everywhere, IMHO.
Thanks for the kind words!
Are you still using the boards with one of the F5 versions? Any other comments or suggestions, especially for other people who plan to use the board with high idle current?
I have done some testing with dummy loads, so that far I know it works as expected, but most of the feedback has been from people who are using the supply with class A-B amps.
PCB Status, 2nd order final update
The final count leaves 16 boards, or 8 sets of two, from the last order.
This includes a couple unclaimed sets, and the last spares. This is a short list of people who expressed interest after the last order, so there are enough for two per person. The following people should have a PM:
klm1
Royber
mordikai
noSleep
apnneto
teabag
mrsavage
There are also a few sets of parts left, but not many. 4~5 complete sets including the pass transistors, plus 2-3 more including the TO-92 parts and rectifier diodes.
If you are interested and your name is NOT on the above list, please feel free to make a one line post below, it may help to know if and when to reorder, and whether to group the orders together.
Note: This does not include people who requested the PSU board with the new version of the through-hole VSSA board. I am keeping a separate list of those, because it makes keeping track simpler for me, or maybe just because I am really lousy at cross-checking lists, take your pick...
Oh, and:
The final count leaves 16 boards, or 8 sets of two, from the last order.
This includes a couple unclaimed sets, and the last spares. This is a short list of people who expressed interest after the last order, so there are enough for two per person. The following people should have a PM:
klm1
Royber
mordikai
noSleep
apnneto
teabag
mrsavage
There are also a few sets of parts left, but not many. 4~5 complete sets including the pass transistors, plus 2-3 more including the TO-92 parts and rectifier diodes.
If you are interested and your name is NOT on the above list, please feel free to make a one line post below, it may help to know if and when to reorder, and whether to group the orders together.
Note: This does not include people who requested the PSU board with the new version of the through-hole VSSA board. I am keeping a separate list of those, because it makes keeping track simpler for me, or maybe just because I am really lousy at cross-checking lists, take your pick...
Oh, and:
Yes, it's driving a 'standard' version of the F5 with the Fairchild o/p fets, not the Toshiba's and rewired with copper (not silver, as previously) and haven't done any fancy bits, except using the old scheme of the outboard C-R-C (Nichicons & Elna) and a 6,800uF SuperThru cap on the CMx o/p.
I'm in the middle of fitting larger heatsinks as the increase in voltage across the pass transistor in the CMx made them REALLY hot, and don't want to 'let out the smoke"!
I think this is the reason for the better overall dynamics and also more 'weight' and detail in the bass - the amp rails are just above 23 volts at 1.8A biased on the o/p fets (just inside the long term SOA, I think) and the main sinks are nicely toasty at 56*C (about 28*C above amb) - sound is quite a considerable improvement over standard version, IMO.
I'm in the middle of fitting larger heatsinks as the increase in voltage across the pass transistor in the CMx made them REALLY hot, and don't want to 'let out the smoke"!
I think this is the reason for the better overall dynamics and also more 'weight' and detail in the bass - the amp rails are just above 23 volts at 1.8A biased on the o/p fets (just inside the long term SOA, I think) and the main sinks are nicely toasty at 56*C (about 28*C above amb) - sound is quite a considerable improvement over standard version, IMO.