F5 pcb group buy... - Page 63

regiregi22 · 15th December 2010, 01:10 PM

Quote:

Originally Posted by EUVL

Yes they do have versions with aluminium plates, but the angles and the screws are still most likely steel (magnetic).

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.

Quote:

Originally Posted by Spev

Anyone running F5 with DCB1 pre? Any issues with them both being dc coupled?

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

reytnz · 06:02 AM

Quote:

Peter Daniel;2399316]This GB (3rd re-run) was just opened, so plenty of boards are available.

Hi Peter,

Recieved mine today, Thanks!!

ReytNZ

chlorofille · 27th December 2010, 02:57 PM

Am still waiting for the boards to arrive. Peter shipped them on 27th Nov.
Hopefully they will arrive soon. =]

potepuh · 28th December 2010, 04:40 AM

Hi Peter

Are there any F5 boards left?

Peter Daniel · 28th December 2010, 06:48 AM

Yes, plenty of boards still available.

h_a · 28th December 2010, 04:07 PM

Quote:

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.

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

Kilroy · 29th December 2010, 01:59 AM

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.

tinitus · 29th December 2010, 02:10 AM

Quote:

Originally Posted by Kilroy

I know Nelson specs 18000uf 25v...

I bet they are with good ripple ratings (current)

Russellc · 29th December 2010, 01:06 PM

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

regiregi22 · 29th December 2010, 01:13 PM

Quote:

Originally Posted by h_a

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

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

28th December 2010, 06:48 AM	#625
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Yes, plenty of boards still available. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

29th December 2010, 01:59 AM	#627
Kilroy diyAudio Member Join Date: Feb 2010 Location: Austin, TX	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. __________________ I made smoke!

29th December 2010, 01:06 PM	#629
Russellc diyAudio Member Join Date: Mar 2003 Location: midwest	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

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27th December 2010, 02:57 PM	#623
chlorofille diyAudio Member Join Date: Jul 2008 Location: Christchurch	Am still waiting for the boards to arrive. Peter shipped them on 27th Nov. Hopefully they will arrive soon. =]

28th December 2010, 04:40 AM	#624
potepuh diyAudio Member Join Date: Feb 2004 Location: SLOVENIA	Hi Peter Are there any F5 boards left?

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