Hi Mark
I have both circuits i.e 060407 and 110806. I think I offered you both of these sometime back on wd forum but it all went quiet. I built mine on 060407 and have (I'm pretty sure) the original bom from Peter Daniels which relates to the 060407 circuit.
let me know which or what you want. Alternatively check my website for a copy of the PtoP board.
Ed
I have both circuits i.e 060407 and 110806. I think I offered you both of these sometime back on wd forum but it all went quiet. I built mine on 060407 and have (I'm pretty sure) the original bom from Peter Daniels which relates to the 060407 circuit.
let me know which or what you want. Alternatively check my website for a copy of the PtoP board.
Ed
sorry Mark
it was audio talk I was thinking about, but even then I can't find the posts so it must have been a conversation that only existed in my head...it happens these days, 'nurse, more of those drugs please'...
send me your email address and I'll send you what I have(all circuits and boms)
Ed
it was audio talk I was thinking about, but even then I can't find the posts so it must have been a conversation that only existed in my head...it happens these days, 'nurse, more of those drugs please'...
send me your email address and I'll send you what I have(all circuits and boms)
Ed
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OK Folks
Now I've got the revised 2007 version of the F4 circuit .
I can see some changes, and some 'issues' if I try to build the 2006 circuit ( for which I have all components ) on Peter's PCBs . There are changes involving how C3 and C4 connect via R24 and R25 onto the 0V which are not the same on the earlier circuit . Maybe if Peter is out there he can comment .
Mark
Now I've got the revised 2007 version of the F4 circuit .
I can see some changes, and some 'issues' if I try to build the 2006 circuit ( for which I have all components ) on Peter's PCBs . There are changes involving how C3 and C4 connect via R24 and R25 onto the 0V which are not the same on the earlier circuit . Maybe if Peter is out there he can comment .
Mark
Thanks Peter I just got that circuit earlier and have been looking at it .
I'm getting a sinking feeling that I won't be able to build the earlier circuit on these PCBs .
I'll have to start ripping stuff out of the ( beautifully designed and made ! ) PCBs ...
Think I'll go back to the speaker project for a couple of weeks .
Mark
I'm getting a sinking feeling that I won't be able to build the earlier circuit on these PCBs .
I'll have to start ripping stuff out of the ( beautifully designed and made ! ) PCBs ...
Think I'll go back to the speaker project for a couple of weeks .
Mark
A couple of questions to clear up some repetitive msunerstandings.
1) What is the power output of an F4? If I understand correctly:
-25w/ch @ 8ohm, 50w/ch @4ohm, and 100W SE or BAL at 8ohm.
-maximum power is 100W class A before it switches to AB.
2) How do I mod my Peter Daniel F4 monos to have a 2nd or 3rd oder low-pass xover at the input and my stereo F4 to have a 1st order high pass? Low pass at 70Hz and the high pass at around 150Hz.
Thanks.
1) What is the power output of an F4? If I understand correctly:
-25w/ch @ 8ohm, 50w/ch @4ohm, and 100W SE or BAL at 8ohm.
-maximum power is 100W class A before it switches to AB.
2) How do I mod my Peter Daniel F4 monos to have a 2nd or 3rd oder low-pass xover at the input and my stereo F4 to have a 1st order high pass? Low pass at 70Hz and the high pass at around 150Hz.
Thanks.
Finally Finished
My first real DIY audio project!
Thanks to cviller for help with the boards and jacco and steenoe for advice on the big RIFA’s.
And, of course, to Nelson – from one ’51 baby to another, thank you for providing the reason and means for an old dog to start learning some new tricks.
I've tried to finish the amp in the Aussie vernacular style – still looking for the right bit of weathered corrugated iron to put on top.
My first real DIY audio project!
Thanks to cviller for help with the boards and jacco and steenoe for advice on the big RIFA’s.
And, of course, to Nelson – from one ’51 baby to another, thank you for providing the reason and means for an old dog to start learning some new tricks.
I've tried to finish the amp in the Aussie vernacular style – still looking for the right bit of weathered corrugated iron to put on top.
Attachments
What to build next????
Will it drive an F4?
Will it drive an F4?
An externally hosted image should be here but it was not working when we last tested it.
Pumpkin is balanced, well it could be used single ended but kid of a shame. Finding a single ended amp with enough gain may be an issue. On the other hand I am driving my F4 with an Impass (Balanced) while the pumpkin get its microprocessor upgrade. I am not sure the one I will keep. The Pumpkin has a little more detail but the Impass is a little more laid back. Both excellent preamps'.
P.S. just noticed led eyes peeking out of knot hole - cool
P.S. just noticed led eyes peeking out of knot hole - cool
I have been playing around with my layout for the F4, and if anyone is interested, I have made a group buy thread here: http://www.diyaudio.com/forums/group-buys/156363-gb-f4-pcb.html
I have attached my current F4 layout, which is probably the one going to fabrication.
I have attached my current F4 layout, which is probably the one going to fabrication.
Attachments
