F5 power amplifier - Page 794

Renron · 24th May 2010, 09:42 PM

Quote:

Originally Posted by bobodioulasso

Totally silent fan

Bobo,

Is that from a toe kick heater? (under cabinet?) I've installed quite a few of those, and yes they are silent.

Ron

bobodioulasso · 09:50 PM

I got them from a flea market. I have been told they come from big computers.
I run them at half their rated voltage.

tinitus · 25th May 2010, 01:06 AM

Most supply caps have snap in lugs, for print boards

But I want to use copper wire

So I thought about using this wirewrap method, which should make the connection better and more solid
It will still be soldered

awc · 25th May 2010, 01:15 AM

sorry still cant see it

Renron · 25th May 2010, 01:38 AM

Should work fine, it looks similar to how the caps are wired in my antique Hafler DH200.

Ron

bear · 25th May 2010, 01:44 AM

Tinitus, very good, but overkill. Solder is likely sufficient.

You click on the image, it gets larger... folks...

...but he is using a wire tie, like is done with heavy gauge AC wire on electric poles when tied to insulators (just a smaller scale).

_-_-bear

awc · 02:19 AM

On my Parallel caps I did it like this, because of the nice color contrast with the copper wire and brass bolts on caps, how ever doesn't always make good contact maybe didn't get all the enamel off the wire or not a good way ?.

tinitus · 25th May 2010, 02:23 AM

Quote:

Originally Posted by bear

but overkill.

_-_-bear

Good

Another thing

Looking at Panasonic supply caps I find that there are some nice ones with higher capacity and low ESR like say 20milli ohm

But some of them have much higher ESR, even in the same range and quality
Maybe they are designed for different application

I wonder if all builders are aware of that
I reckon the higher ESR could result in caps getting quite warm, or ?

awc · 25th May 2010, 02:43 AM

Ive used in parallel 11 Mallory 6400 uF 60 vot 45x80mm they not quite fitting for this circuit but they give a nice tone and detail etc to the amp in front of them i have 4 10.000 in serial with ov to earth on them. small caps I suspect have better ESR but using what i had still have 30 6400uF if any one what some ?
NOS. I cant even use them for door stoppers they just roll away.

awc · 25th May 2010, 05:11 AM

bear, Ive just been looking at your site, and the way your power supply done on Symphony amp, its brilliant I'll get some copper I think,
you have to transformers in parallel ?

24th May 2010, 09:48 PM	#7932
bobodioulasso diyAudio Member Join Date: May 2008	I got them from a flea market. I have been told they come from big computers. I run them at half their rated voltage. Last edited by bobodioulasso; 24th May 2010 at 09:50 PM.

25th May 2010, 01:38 AM	#7935
Renron diyAudio Member Join Date: Jan 2007 Location: Sacramento	Should work fine, it looks similar to how the caps are wired in my antique Hafler DH200. Ron __________________ "If it doesn't work properly, hope it catches on fire"- Nelson Pass @ BA3 "I fired up the prototype. Literally." The Prophet Pass.

25th May 2010, 01:44 AM	#7936
bear expert in tautology diyAudio Member Join Date: Apr 2002 Location: New York State USA	Tinitus, very good, but overkill. Solder is likely sufficient. You click on the image, it gets larger... folks... ...but he is using a wire tie, like is done with heavy gauge AC wire on electric poles when tied to insulators (just a smaller scale). _-_-bear __________________ _-_-bear http://www.bearlabs.com [...2SJ74 Toshiba bogus asian parts - beware! ] -- Btw, I don't actually know anything, FYI --

25th May 2010, 02:15 AM	#7937
awc diyAudio Member Join Date: Aug 2009	On my Parallel caps I did it like this, because of the nice color contrast with the copper wire and brass bolts on caps, how ever doesn't always make good contact maybe didn't get all the enamel off the wire or not a good way ?. Last edited by awc; 25th May 2010 at 02:19 AM.

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25th May 2010, 01:15 AM	#7934
awc diyAudio Member Join Date: Aug 2009	sorry still cant see it

25th May 2010, 02:43 AM	#7939
awc diyAudio Member Join Date: Aug 2009	Ive used in parallel 11 Mallory 6400 uF 60 vot 45x80mm they not quite fitting for this circuit but they give a nice tone and detail etc to the amp in front of them i have 4 10.000 in serial with ov to earth on them. small caps I suspect have better ESR but using what i had still have 30 6400uF if any one what some ? NOS. I cant even use them for door stoppers they just roll away.

25th May 2010, 05:11 AM	#7940
awc diyAudio Member Join Date: Aug 2009	bear, Ive just been looking at your site, and the way your power supply done on Symphony amp, its brilliant I'll get some copper I think, you have to transformers in parallel ?

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