F-4 boards

[Ana]

This thread is for discussions about the F4 boards. For more information on this product, please see the product page below.

Product Page: P-F4-2V20 - Pair of F-4 boards (Makes 2 channels; Rev 2.0) - Boards
Schematic: http://www.diyaudio.com/forums/imag...cumentation/P-F4-1V20/P-F4-1V20-schematic.pdf
BOM: http://www.diyaudio.com/forums/images/diy/store/board-documentation/P-F4-1V20/P-F4-1V20-bom.xls
Dimensions: http://www.diyaudio.com/forums/imag...umentation/P-F4-1V20/P-F4-1V20-dimensions.pdf

Threads on diyAudio that relate to this product (If we have missed one, please post it in this thread and we will add it to the list):

• Original Article: FIRST WATT F4
• Build Guide (NEW!): diyAudio F4 Build Guide
• Build Thread: http://www.diyaudio.com/forums/pass-labs/97540-f4-power-amplifier.html
• Build Thread: http://www.diyaudio.com/forums/pass-labs/188643-sharing-my-build-progress-f4-aleph-30-a.html
• Listening Impressions: http://www.diyaudio.com/forums/pass-labs/195084-f4-listening-impressions.html

 

[thor61]

If building the "F4" and using the Universal PSU, Capacitor and Diode Combination Board, what would be the ideal VA rating for the transformer ? and also does anyone know of a good 15000uf 25v psu capacitor to use ? 😱 thank-you

 

[JojoD818]

250VA or greater size transformer will do nicely.

 

[thor61]

How about a 400VA with 2 x 18v secondaries ?

 

[JojoD818]

How about a 400VA with 2 x 18v secondaries ?

That's more than 250VA so I'm sure it will work.

 

[thor61]

F4 BOM !

Could someone please convert this to a pdf type file > http://www.diyaudio.com/forums/image...4-1V20-bom.xls Thank-you !

 

[Jason]

Here you go...

Also, you might like to try the free Microsoft Excel viewer.

Download Excel Viewer from Official Microsoft Download Center

 

[Jason]

New F4 build guide from 6L6:

http://www.diyaudio.com/forums/pass-labs/234355-guide-building-pass-f4-amplifier.html

 

[jamayfie]

C1-6

I think the BOM is missing the caps. Or I'm missing something....

 

[JojoD818]

I think the BOM is missing the caps. Or I'm missing something....

Yes indeed. I'll get that one for you in a bit.

Thank you for pointing it out. 🙂

 

[kpsthakur]

All pics missing

New F4 build guide from 6L6:

A guide to building the Pass F4 amplifier.

Tragedy...all pics are missing from the visual guide...


6L6, any way you could reload those pics for new joiners...or maybe anyone of you holds a pdf extract of the guide...All help appreciated

 

[JeffYoung]

They appear fine for me. (I did note that the link was highlighted as "followed" already, so perhaps my machine has them all cached?)

 

[kpsthakur]

They appear fine for me. (I did note that the link was highlighted as "followed" already, so perhaps my machine has them all cached?)

Aw...any chance you could convert web page to pdf and share, will be a great help

 

[JeffYoung]

Most of the build guide is on the first page, so I just generated a PDF of that. But it's still 28M, and the forum said "no dice".

See if this link works for you: http://web.archive.org/web/20170629.../234355-guide-building-pass-f4-amplifier.html

 

[kpsthakur]

Most of the build guide is on the first page, so I just generated a PDF of that. But it's still 28M, and the forum said "no dice".



See if this link works for you: http://web.archive.org/web/20170629.../234355-guide-building-pass-f4-amplifier.html

Hurray.... there is light...thanks Jeff, the link works just fine

 

[Hypnoglitz]

Enough?

Hello- New to site and I'm curious if the F4 would fit my setup...many of the numbers concerning the ins and outs of the amplifier confuse the heck out of me, so I'm hoping you might have some guidance.

From what I understand, the F4 does not have gain, so I would be relying on my preamplifier's gain. If that is correct, would a Schiit Freya (the original version with passive and tube gain) Schiit Audio, Headphone amps and DACs made in USA., be enough to make for a good listen with my Spatial M4 Turbo S (not the triode version) M4 — Spatial Audio Lab.

My listening space is on the bigger side but I listen at levels around 55-80 db.

Thank you,
Nick