F3 and F4 Clone PCB Reissue group buy, also F5 PCBs

[ejfud]

Is it to late to add another PS board to my order?

 

[Peter Daniel]

It's still OK.

 

[MEGA_amp]

No prob waiting.

 

[Peter Daniel]

That's how the boards actually look:

 

[ejfud]

It's still OK.

Money sent for an extra F3 PS board.

Thanks Peter.

 

[ims]

It's OK for waiting.
Thanks.

 

[musical]

Just added to Wiki 3 PSU, 1 F3 and 1F4. The 3 PSU is one for F3 and two for F4. Is that $75 all together?

 

[Peter Daniel]

Yes, it is correct. Payment info was posted here: http://www.diyaudio.com/forums/showthread.php?postid=1680605#post1680605

 

[samoloko]

Re: Balanced F4

what are benefits of connection from post # 33 compared to dual channel stereo
why not connect single PS pcb with single pair pcb instead of connecting both + and - to different pair pcbs

 

[AlanElsdon]

and some more psu boards

Peter - I will need 2 more psu boards - this time for the F2 - I assume that the F3 psu board will be applicable - if so thats another $30 to be paid.

Thanks

Alan

 

[Peter Daniel]

Yes, that's correct

 

[AlanElsdon]

Money sent - thanks again

 

[Peter Daniel]

Re: Re: Balanced F4

Got it thanks.

what are benefits of connection from post # 33 compared to dual channel stereo
why not connect single PS pcb with single pair pcb instead of connecting both + and - to different pair pcbs

Refering to this diagram: http://www.diyaudio.com/forums/attachment.php?s=&postid=1672598&stamp=1228160049 it is bridged configuration with two amp boards per channel providing more power as described here (page 7): http://www.firstwatt.com/downloads/f4_om.pdf

Each PS board in that diagram represent single voltage supply (+ or - ), so for symmetrical supply required by F4 amp you need two of those, connected to each amp board.

You can also use 4 of those PS boards (it's a PS board broken in half at scoring line), 2 per each amp board.

 

[samoloko]

thx for explanation
could be achieved more power than 25 W from F5 connecting the upper way
if It can be done - are this going to be up to 100 W - has anybody test It
Is It correct that that way I need 2 F5 pcbs and 2 PS pcbs

 

[Peter Daniel]

I don't see a reason why that couldn't be done with F5 as well and your board count is corect.

 

[samoloko]

In that way may I buy 5 PSU pcbs and 2 F5 pcbs from you
If so I have to pay you 7 x 15 USD and add 7 USD eventually for Insurance

 

[Peter Daniel]

Yes no problem, payment info here: http://www.diyaudio.com/forums/showthread.php?postid=1684087#post1684087

 

[Melon Head]

I just realised there are a few more adjustment pots on the F3 compared to the ZV9.
Does anyone have the instructions for setting up the F3 correctly?

 

[orthoefer]

What are the dimensions for the F5 amp board(s) and corresponding PS board(s)? Thanks

 

[Peter Daniel]

The F5 amp board (single channel) is 1.7 x 2.4" and allows approx 4" spacing for output devices. Matching PS board (same as for F4) is 3.4 x 4.8"