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F5 pcb group buy...

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#621
EUVL said:
Yes they do have versions with aluminium plates, but the angles and the screws are still most likely steel (magnetic).
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Is that a bad thing? I thought that steel or magnetic conductors were bad for carrying signal, didn't even imagine that having these materials near will affect.

Spev said:
Anyone running F5 with DCB1 pre? Any issues with them both being dc coupled?
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Yes I do, not issues at all with DCB1's protection relay. Neither turning first the preamp on nor the poweramp.
But I have output capacitors at my source.

Regards,
Regi
 
#626
Is that a bad thing? I thought that steel or magnetic conductors were bad for carrying signal, didn't even imagine that having these materials near will affect.
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Technically? No.

I remember Syn08 found for his ultralow distortion amps that steel made a measurable difference, but before you worry about steel in context with such amps, you need to get wiring/grounding right first. Really big topic for ultralow distortion amps.

No need to worry about that 😉
 
#627
Quick possibly newb question, I found some 22,000uf 35V caps for my stereo F5 project... Is 35v sufficient? I see people going up to 65v and wasn't sure if that's just a product of what was available at the time or some other meaningful reason.

I know Nelson specs 18000uf 25v... I just want to verify that's OK for this PSU design as well... I don't see anything that would cause a change but I'm a rookie. 🙂
 
#629
ordering boards....

Peter, I thought I would pick up another set of F-5 boards. Do we use the info and pricing on page 1 still? seems like I remember an increase for shipping or something? Same pay pal address on the audiosector site?

Thanks,

russellc
 
#630
h_a said:
Technically? No.

I remember Syn08 found for his ultralow distortion amps that steel made a measurable difference, but before you worry about steel in context with such amps, you need to get wiring/grounding right first. Really big topic for ultralow distortion amps.

No need to worry about that 😉
Click to expand...
Thanks, quite recomforting 😎


Kilroy, you must choose capacitor rating to be AT LEAST higher than the applied voltage. So, for a 24v supply, 25v rating would be enough. They won't explode if you apply 26v or even 28, but that will shorten their life.
Personally, I would use 35v for a 24v supply. Going higher only increases size and cost.

Regards,
Regi
 
#632
regiregi22 said:
Thanks, quite recomforting 😎


Kilroy, you must choose capacitor rating to be AT LEAST higher than the applied voltage. So, for a 24v supply, 25v rating would be enough. They won't explode if you apply 26v or even 28, but that will shorten their life.
Personally, I would use 35v for a 24v supply. Going higher only increases size and cost.

Regards,
Regi
Click to expand...

Great, thanks!
That's what I thought, but I just wanted to make sure there wasn't some kind of magic I was missing.

-Phil
 
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