F5 power amplifier - Page 106

tms0425 · 6th June 2008, 01:59 AM

I used the largest Conrads, but these should work if tall enough or use two 8.5" sections side by side and 8-12" tall.

Ebay heatsinks cut to order

I also used that Plitron and it's a nice transformer for this amp.

Tom

vdi_nenna · 6th June 2008, 12:27 PM

Do you guys use 1- 18+18v, 8 amp transformer for 2 channels?

tms0425 · 6th June 2008, 12:44 PM

I plan to use Plitron 18V+18V@8.33A (300VA) p/n 077014201 also for 2 channels. Currently I have 2 of those in my F4, but one actually works just fine. I think Nelson indicated awhile back in the thread that I should be ok with one of those for a stereo F5.

Tom

vdi_nenna · 6th June 2008, 01:02 PM

You guys don't think there will be cross-talk between the 2 channels? For example, the Zen amp require only a + supply, so using 1 transfo with dual supplies worked ok. The F5 requires a + & - supply. Just want to get your thoughts on this.

Thanks,

Vince

DaveM · 6th June 2008, 01:11 PM

There should be no problem with this at all.

Nelson Pass · 6th June 2008, 06:34 PM

The crosstalk I got was so low that I couldn't measure it
reliably.

Manu · 6th June 2008, 06:46 PM

Ah!

What is generally the main culprit for crosstalk?

or should I say : what make F5 immune for xtalk?

Manu

Dr. ODD · 6th June 2008, 07:07 PM

Quote:

or should I say : what make F5 immune for xtalk?

Class A ?

Nelson Pass · 6th June 2008, 08:59 PM

The channels are well separated, and the grounding is good.

Zen Mod · 6th June 2008, 09:06 PM

Quote:

Originally posted by Manu
Ah!

What is generally the main culprit for crosstalk?

or should I say : what make F5 immune for xtalk?

Manu

weed?

(every new user of F5 will find a small bag in it ...... so in case of selling it ( God forbid!) , remember to pay it forward ......)

6th June 2008, 12:27 PM	#1052
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA	Transformer Question Do you guys use 1- 18+18v, 8 amp transformer for 2 channels? __________________ I build, therefore I am.

6th June 2008, 01:02 PM	#1054
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA	You guys don't think there will be cross-talk between the 2 channels? For example, the Zen amp require only a + supply, so using 1 transfo with dual supplies worked ok. The F5 requires a + & - supply. Just want to get your thoughts on this. Thanks, Vince __________________ I build, therefore I am.

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6th June 2008, 01:59 AM	#1051
tms0425 diyAudio Member Join Date: Oct 2006 Location: Ft. Wayne, IN	I used the largest Conrads, but these should work if tall enough or use two 8.5" sections side by side and 8-12" tall. Ebay heatsinks cut to order I also used that Plitron and it's a nice transformer for this amp. Tom

6th June 2008, 12:44 PM	#1053
tms0425 diyAudio Member Join Date: Oct 2006 Location: Ft. Wayne, IN	I plan to use Plitron 18V+18V@8.33A (300VA) p/n 077014201 also for 2 channels. Currently I have 2 of those in my F4, but one actually works just fine. I think Nelson indicated awhile back in the thread that I should be ok with one of those for a stereo F5. Tom

6th June 2008, 01:11 PM	#1055
DaveM diyAudio Member Join Date: Feb 2003 Location: Vermont	There should be no problem with this at all.

6th June 2008, 06:34 PM	#1056
Nelson Pass The one and only Join Date: Mar 2001	The crosstalk I got was so low that I couldn't measure it reliably.

6th June 2008, 06:46 PM	#1057
Manu diyAudio Member Join Date: Nov 2002 Location: Vienna, Ostrich	Ah! What is generally the main culprit for crosstalk? or should I say : what make F5 immune for xtalk? Manu

6th June 2008, 08:59 PM	#1059
Nelson Pass The one and only Join Date: Mar 2001	The channels are well separated, and the grounding is good.

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