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V3 Universal Power Supply Circuit Board
V3 Universal Power Supply Circuit Board
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Old 4th April 2017, 06:00 PM   #351
Dukja is offline Dukja  United States
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A non-technical question: Currently the Universal PS board at the diyaudiostore is out. Is there any estimation on the next batch? Or is there other sources for the similar board? Thanks a lot!
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Old 25th April 2017, 02:40 PM   #352
daniii88 is offline daniii88
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Quote:
Originally Posted by Dukja View Post
A non-technical question: Currently the Universal PS board at the diyaudiostore is out. Is there any estimation on the next batch? Or is there other sources for the similar board? Thanks a lot!
+1

Maybe somebody has a link for a similar quality PSU.
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Old 25th April 2017, 02:53 PM   #353
alvinlim is offline alvinlim  Malaysia
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Try jims audio on ebay
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Old 2nd August 2017, 10:45 AM   #354
novanta00 is offline novanta00  Italy
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Sorry for the common question but i'm a newbie and this is my first request. Can i use this pcb for two aca (R15 mod) 24V dc?
Many thanks
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Old 9th November 2017, 11:14 PM   #355
Todd Mills is offline Todd Mills  Canada
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Is it possible to use two Universal Power supplies V3 and two transformers to build a stereo chassis F5T?
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Old 10th November 2017, 02:51 PM   #356
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by Todd Mills View Post
Is it possible to use two Universal Power supplies V3 and two transformers to build a stereo chassis F5T?
Yes.
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Old 10th November 2017, 02:53 PM   #357
6L6 is offline 6L6  United States
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V3 Universal Power Supply Circuit Board
Remember a single 5U 400 chassis is enough heatsink for a standard F5Tv2.
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Old 11th November 2017, 03:45 AM   #358
2 picoDumbs is offline 2 picoDumbs  Australia
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Just a warning.
Some of the pcb tracks on the rectifier boards come too close to the mounting holes so that if you are using washers, the washers will be covering the pcb tracks.
The only thing preventing a short is the thin varnish.
Always remember Murphy's Law reigns supreme.

To prevent issues it's probably best not to use washers here.
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Last edited by 2 picoDumbs; 11th November 2017 at 03:49 AM.
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Old 6th January 2018, 07:40 PM   #359
Todd Mills is offline Todd Mills  Canada
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Another question on the power supply for stereo F5T. Would I be safe using 40volt caps or is that pushing it?
I can get Mundorf 33000mf 40 volt caps that will fit or I can get Mundorf 22000mf 63volt caps. Roughly same price but big difference in capacitance. One supply per channel. 176000mf vs 264000mf.
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Old 7th January 2018, 07:50 AM   #360
AndrewT is offline AndrewT  Scotland
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a dual 25Vac transformer will generate ~37Vdc on a lower bias ClassAB amplifier.
Expect a couple of volts less into a Full ClassA amplifier.
That gets your caps down to ~+35Vdc.
Then add on 10% for max mains tolerance and your 40Vdc is still not exceeded.

But what if the amplifier is disconnected? How high will your 25Vac transformer take the PSU when loading is open circuit?
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