Pictures of board builds...
Don't know why but your pictures I wanted to reference seemed to be gone? Just a temp forum anomoly or permanent loss?
http://www.diyaudio.com/forums/pass-labs/121228-f5-power-amplifier-280.html#post1740824
Is there any other place to view your board builds or could they be reloaded?
Thanks
Jon
Don't know why but your pictures I wanted to reference seemed to be gone? Just a temp forum anomoly or permanent loss?
http://www.diyaudio.com/forums/pass-labs/121228-f5-power-amplifier-280.html#post1740824
Is there any other place to view your board builds or could they be reloaded?
Thanks
Jon
It's a permanent loss. I linked the pics from a different forum and since they changed coding, they can't be displayed properly here any longer.
I reposted them again here: http://www.diyaudio.com/forums/group-buys/140306-f5-pcb-group-buy-29.html#post2376917
I reposted them again here: http://www.diyaudio.com/forums/group-buys/140306-f5-pcb-group-buy-29.html#post2376917
Remote mounting Q3 / Q4
Hello Peter,
Are there recommended length limits / wire gauge / other guidelines to remote mounting of Q3 / Q4 to your F5 boards? I also searched the large F5 power amp thread to no avail...😉
Thanks
Jon
Hello Peter,
Are there recommended length limits / wire gauge / other guidelines to remote mounting of Q3 / Q4 to your F5 boards? I also searched the large F5 power amp thread to no avail...😉
Thanks
Jon
There are 3 wires feeding each output FET.
The gate stopper must be mounted directly on the Gate Pin.
How should the 3 wires be arranged geometrically, to get best performance from the amplifier.
As a twisted pair + 1, or as a twisted triplet, or as 3 parallel but close spacing, or 3 parallel with wide spacing, or something else?
The gate stopper must be mounted directly on the Gate Pin.
How should the 3 wires be arranged geometrically, to get best performance from the amplifier.
As a twisted pair + 1, or as a twisted triplet, or as 3 parallel but close spacing, or 3 parallel with wide spacing, or something else?
Recent Pay Pal
Peter,
I just pay paled you for 2 stereo sets of F-5 boards. Please let me know if I'm correct and you received payment...
Thanks,Russellc
Peter,
I just pay paled you for 2 stereo sets of F-5 boards. Please let me know if I'm correct and you received payment...
Thanks,Russellc
Hello Peter,
Are there recommended length limits / wire gauge / other guidelines to remote mounting of Q3 / Q4 to your F5 boards? I also searched the large F5 power amp thread to no avail...😉
Nelson says that 6" to a foot is not a problem: http://www.diyaudio.com/forums/pass-labs/8476-aleph-wiring.html#post93141
4-poles caps
Hi Peter
I am about to order the caps for your universal PS boards. In an earlier post you recommended top caps like Nichicon Super Through or Jensen caps. I see that you even use the ultrapricey Jensen 4-pole slitfoil caps directly attached to the F5 pcb. I just read about them on their website claiming to have better results than even the best 2-pole caps. Of course I would say the same when I want to sell my own products😉 . What is your experience with the 4-poles compared to other 2-poles like the Super Through's e.g.
Hi Peter
I am about to order the caps for your universal PS boards. In an earlier post you recommended top caps like Nichicon Super Through or Jensen caps. I see that you even use the ultrapricey Jensen 4-pole slitfoil caps directly attached to the F5 pcb. I just read about them on their website claiming to have better results than even the best 2-pole caps. Of course I would say the same when I want to sell my own products😉 . What is your experience with the 4-poles compared to other 2-poles like the Super Through's e.g.
I did compare Jensens with Nichicon Super through in Gainclone snubberized PS and I preferred the Jensens slightly better, although the difference wasn't anything big.
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There were a few posts over in the F5 thread a while back (~december-jan) with an ebay seller who had them very cheap. I bought some and they were fine. Something like 50 for $4 or something.
Found it on ebay. Like you wrote Woodturner-fran, 50 mica's for TO 247. Bought them. Super, thx!
PS Boards for F5
Following your criteria and using Jensen 4 pole electrolytics, ideally, how many and what capacitance/voltage would you recommend per channel for a stereo F5?
In your opinion, would the sonic differences the Jensen caps might bring be significant enough to spend the extra $$ vs using large conventional electrolytics such as Panasonics, Elnas, etc ?
I haven't had the opportunity to compare directly. Thanks for any advice you can offer.
Peter Daniel said:1 Smaller board is easier and cheaper to ship.
2 If a single cap can have enough capacitance, why use multiple?
3 Single cap usually also sounds better than few in parallel.
Following your criteria and using Jensen 4 pole electrolytics, ideally, how many and what capacitance/voltage would you recommend per channel for a stereo F5?
In your opinion, would the sonic differences the Jensen caps might bring be significant enough to spend the extra $$ vs using large conventional electrolytics such as Panasonics, Elnas, etc ?
I haven't had the opportunity to compare directly. Thanks for any advice you can offer.
Running F-5 without current limiting
When removing current limiting, I understand the following are deleted:
Q5 and Q6, th1 and th2, R15, R16, R17, R18, R19, R20, R21, and R22.
Does one leave the 10K R1 and R2? Or does it go too?
Thanks,
Russellc
When removing current limiting, I understand the following are deleted:
Q5 and Q6, th1 and th2, R15, R16, R17, R18, R19, R20, R21, and R22.
Does one leave the 10K R1 and R2? Or does it go too?
Thanks,
Russellc
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