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Old 28th November 2009, 08:51 PM   #21
Electrons are yellow and more is better!
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Peter, I see that the transformer has 230 VAC in. You have very short creepage distances. I can't see any 8 mm between ground and the mains.
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Old 28th November 2009, 08:54 PM   #22
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Search the Forum Peranders, we've already discussed that issue, besides, it's wired for 115V.

PS: I'm really dissapointed with your input here. Since it's proto board, you can clearly see that the distance is no less than the pin spread on IEC inlet.
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Old 28th November 2009, 09:08 PM   #23
Electrons are yellow and more is better!
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It is less. You have blank copper pads in between. It seems tight even for 115 V.
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Old 1st January 2010, 08:54 PM   #24
jleaman is offline jleaman  Belgium
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Nice work on the chassis, good idea Peter, Question, does the transformer being in the same case cause any mechanical hum OR interference being that it is close to the psu board and enclosed in the same chassis as the psu board ?
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Old 27th January 2010, 03:47 PM   #25
jtktam is offline jtktam  Canada
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Peter,

I recently got a bunch of these from you.. Are they usable with my B1 buffer build? which section from the 3 section board do I use?

-joe
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Old 29th January 2010, 01:46 PM   #26
jtktam is offline jtktam  Canada
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Hi Peter,

Just another quick question about the 120R for the power supply example, is there any wattage requirement?

-joe
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Old 5th February 2010, 05:03 AM   #27
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Yes, they will work fine with B1 buffer. If you are using original buffer schematic, then only positive supply section is needed. It would look similar to this, although you might use a different regulator type as well: Universal Power Supply PCB
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Old 10th February 2010, 07:52 PM   #28
cjkpkg is offline cjkpkg  United States
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I see R9-R10 listed on the F5 amp BOM Excel spreadsheet...a 3W 2.2K. I presume this is a bleeder resistor that goes somewhere on the PSU board? I also presume that you would need a total of 4 for a symmetrical supply?

EDIT: I guess the BOM I am referencing is more of a "generic" PSU BOM and not for Peter's PSU board. That being said, is there a spot for a bleeder resistor on the universal PSU board? Is it absolutely necessary?

Last edited by cjkpkg; 10th February 2010 at 07:57 PM.
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Old 11th February 2010, 03:12 PM   #29
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I never used those bleeder resistors in my amps. If you need one, you can attach it directly to cap pins from the bottom.
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Old 12th February 2010, 12:56 PM   #30
cjkpkg is offline cjkpkg  United States
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Got it...I was looking at the spreadsheet you had referenced in one of the F5 threads...

Funny...I don't even have my aleph mini done yet and I am already ordering parts and planning the F5...
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