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WTB: F4 PCB boards

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#322
Dougie085 said:
Yeah as soon as more boards become available! 3-4 weeks seems so far away. Oh well I guess I'll be building my new DAC first.
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You could start purchasing your parts so when the boards arrive you could populate them and stuff, even better. Build your chassis ? that will make time go by faster 😀
 
#326
But would 2 (1 per channel) be better?
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It may give better channel separation but a pretty esoteric point.

it will have/consume more power though
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No it won't


No, one 18-0-18 @ 400 Va should be enough to run 2 F4's all in one box.
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1 F4 (2 channels) in a box is given 300VA by Nelson
so 2 F4's in a box ( 2 balanced channels ) would optimally have 600VA no? I'll grant that 400 might work, but interested in your logic.
 
#330
:snail: :snail: So how's everyone's F4 coming along?

:whip: :whip: Surely someone must be done by now

:santa2: :santa2: Those of us waiting on the second batch are getting anxious

:xfingers: :xfingers: Who will bring us the good news first?

It's been way too quiet in this thread ... something's not right here :bawling: :bawling:

I bet the people how are finished have not left their music long enough to post, oh well

:cheers: :cheers:
 
#332
twitchie said:
Oh, sorry, I made a mistake - I used Vishay for the bridge rectifiers, not IXYS

Digikey # is GBPC3502A-ND

If you want to use IXYS (more expensive), you could try the 27A-600V like the one on this page:

http://www.partsconnexion.com/catalog/semiconductors.html
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I'm assuming that you're not using PD power supply boards, or are you snapping off the rectification portion and somehow mounting the Vishay bridges elsewhere?

Also, anyone decide on one of the many TL432 at digikey for PD's boards?

Thanks!
 
#333
no, I built my F4 a few months back based on Veteran's pdf in the F4 thread.

I etched my own PSU boards using 8x15000uF caps and mounted the rectifiers on the back (1/4" thick alu) plate for heat dissipation. My PSU board layout is basically the same as Veteran and Peter's layout for the ZV9 (CCRCC)
 
#334
twitchie said:
no, I built my F4 a few months back based on Veteran's pdf in the F4 thread.

I etched my own PSU boards using 8x15000uF caps and mounted the rectifiers on the back (1/4" thick alu) plate for heat dissipation. My PSU board layout is basically the same as Veteran and Peter's layout for the ZV9 (CCRCC)
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hello.

did you use the same power supply as the one that with the service manual? If so, can you please measure the voltage across the resistors in the power supply?

Thank you very much
 
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