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diyAudio Power Supply Circuit Board v3 illustrated build guide
diyAudio Power Supply Circuit Board v3 illustrated build guide
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Old 11th November 2018, 05:11 PM   #741
Sesquipedalio is offline Sesquipedalio
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Join Date: Sep 2018
Thanks WKCox! That is exactly the direct help I needed. I am also thankful I do not need to do alterations, as it would be outside my wheelhouse at this [gain] stage (Bah ha hah - pun intended!).
I noticed you are around the corner in Verona. I am on Madtown's east side. Good to know there is a builder in the area!
Ses
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Old 11th November 2018, 05:20 PM   #742
Sesquipedalio is offline Sesquipedalio
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Actually, I would still like to know how, when and why one would decide to add (or omit) the R_Optional1-6 (optional resistors).



Also, I am very interested in all decisions RE:
  • R11-R12 (output snubber resistors)
  • RS1-RS2 (input snubber resistors)
  • CX1-CX2 (input snubber capacitor)
  • CS1-CS2 (input snubber capacitor)
I think the above are omitted from the first post 'build guide' and would like to really understand why. What makes the optional resistors a good/poor choice? It seems like the snubbers are a good idea and sort of fail safe.
Best to all
-Ses
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Old 11th November 2018, 05:33 PM   #743
WKCox is offline WKCox  United States
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Location: Verona, WI
diyAudio Power Supply Circuit Board v3 illustrated build guide
If you read posts #43 through #57, your questions should be answered regarding snubbers and RC filters. No need to populate optional resistors or snubbers if used with M2x.
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Old 11th November 2018, 11:41 PM   #744
Sesquipedalio is offline Sesquipedalio
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Good to know - thanks for the clear direction, WKCox
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Old Yesterday, 03:34 AM   #745
batty is offline batty  Australia
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Location: Adelaide, South Australia
Is it OK to use this PSU in an M2x build with the standard components in the BOM I plan to use 2x bridge rectifiers. Toroid is 2x 18V 10A. This one https://www.ebay.com.au/itm/NORATEL-...53.m1438.l2649
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Old Yesterday, 08:55 PM   #746
Alex Cazanescu is offline Alex Cazanescu
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Quote:
Originally Posted by doore View Post
I have read and re-read this (entire) forum, but cannot definitively tell exactly how to connect the 18V AC leads from my transformer to the PSUv3 board using the diode rectifier bridge. I've posted a photo of my current build below -- and indicted what I *think* I understand about how this should be connected to the 18V AC input. I know this is a trivial question and one I should be able to figure out (or infer) but I simply don't feel confident that I'm understanding this correctly. Thank you in advance!
Hi,
Did you get any answer on this issue? I have the same problem :-((.
thanks
Regards
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Old Yesterday, 09:32 PM   #747
Mazeppa is offline Mazeppa  United States
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Location: Harrison, Arkansas
From Aleph J build guide, same power supply.
Attached Images
File Type: jpg bridges_zpsbec07865.jpg (124.8 KB, 24 views)
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Old Today, 06:20 AM   #748
aalewis is offline aalewis  Australia
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Join Date: Sep 2015
Location: Central Victoria, Australia
Default Is this correct

Testing the PSU and I am getting 64 VDC reading. The transformer is 2 x 22V, and I have wired it as 1st set of secondaries to AC1A and AC1B. The second set of secondaries wired to AC2A and AC2B. I wanted 30-32 VDC for the Pearl 2. What have I done wrong.
Andrew
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Old Today, 04:16 PM   #749
Ben Mah is online now Ben Mah  Canada
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Australia is 230V so the transformer primaries should be wired in series. Did you wire them in parallel? Parallel would double the secondary voltage.
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