Chip Amp Photo Gallery - Page 18

N-Channel · 25th October 2006, 01:51 PM

Halo,

Please look at the orientation of the two Ls in the AC Filter. They are going from line and neutral, respectively to ground. Shouldn't they be in series with line and neutral and be mutually coupled?

Steve

halo0925 · 25th October 2006, 02:28 PM

N-Channel thank you very much, could have given somebody a nasty surprise, I put the schematic together a little to quicky when somebody asked all I had was a printed. The corrected version is above now and looked it over to make sure I didnt make any other rushed mistakes.

FastEddy · 28th October 2006, 05:06 PM

N-channel: " ... look at the orientation of the two Ls in the AC Filter. They are going from line and neutral, respectively to ground. Shouldn't they be in series with line and neutral and be mutually coupled? ..."

The partial diagram is very similar to laboratory gear line filters ... a tank circuit with two inductors and several caps (& resistors), filtering any noise riding in on the power cord.

halo0925 · 28th October 2006, 05:22 PM

refresh your page, the corrected version is there

halo0925 · 28th October 2006, 05:26 PM

Sorry look closer you have the right one, they are correct.

FastEddy · 28th October 2006, 05:30 PM

" ... refresh your page, the corrected version is there ..."

A very good job ... I'll bet your power supply is just about as clean as is possible. The (newer) diagram is now quite clear as well.

Wondering: Did you build this entirely from your own design(s)? ... using parts from other amps or purchased "new" ? ...

Also: Noticing the double diode, full wave bridge ... What type ?? (1n4004 or other?)

Would it be possible to see a 'scope trace of the power supply output?? (Or some kind of measurement indication of what little ripple there is ??)

Great job, great design ...

mariofer · 29th October 2006, 01:18 AM

Quote:

Originally posted by enzedone
Here's a pic of the inside

Very nice construction, but what is the function of all these caps on the bridges?

halo0925 · 29th October 2006, 01:48 AM

FastEddy, The Amp is all new I do my own boards ect... as for the power supply its basically my takeoff on various others.
The Diods are 6amp fast recovery diods from faichild semi I dont remember the part #, but could look it up. Ive tried ultra fast diodes but cant tell a major difference Some people sware by the MUR series.
I never put the supply on the scope didnt really see a reason, but it should be pretty clean probably better then alot of regulated ones.

mariofer, By useing many smaller faster lower ESR caps you get the benifts of large storage and better faster control.

mariofer · 29th October 2006, 02:50 AM

Quote:

Originally posted by halo0925
mariofer, By useing many smaller faster lower ESR caps you get the benifts of large storage and better faster control. [/B]

Sorry, but I was asking about a pic posted a few months ago by enzedone:

Chip Amp Photo Gallery

In the pic you can see four poliester caps over the bridge. And I wondered why (¿?)

halo0925 · 29th October 2006, 03:26 AM

.01uf to .1uf caps are often used on each diode to help damp out the switch on and off of the diode helping to reduce residual AC noise, and some what help its clamping.

25th October 2006, 01:51 PM	#171
N-Channel diyAudio Member Join Date: Mar 2003 Location: Sol System	AC Filter Inductors Halo, Please look at the orientation of the two Ls in the AC Filter. They are going from line and neutral, respectively to ground. Shouldn't they be in series with line and neutral and be mutually coupled? Steve

29th October 2006, 01:48 AM	#178
halo0925 diyAudio Member Join Date: Aug 2006	Power supply ?'s FastEddy, The Amp is all new I do my own boards ect... as for the power supply its basically my takeoff on various others. The Diods are 6amp fast recovery diods from faichild semi I dont remember the part #, but could look it up. Ive tried ultra fast diodes but cant tell a major difference Some people sware by the MUR series. I never put the supply on the scope didnt really see a reason, but it should be pretty clean probably better then alot of regulated ones. mariofer, By useing many smaller faster lower ESR caps you get the benifts of large storage and better faster control.

29th October 2006, 03:26 AM	#180
halo0925 diyAudio Member Join Date: Aug 2006	caps on bridge .01uf to .1uf caps are often used on each diode to help damp out the switch on and off of the diode helping to reduce residual AC noise, and some what help its clamping.

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25th October 2006, 02:28 PM	#172
halo0925 diyAudio Member Join Date: Aug 2006	N-Channel thank you very much, could have given somebody a nasty surprise, I put the schematic together a little to quicky when somebody asked all I had was a printed. The corrected version is above now and looked it over to make sure I didnt make any other rushed mistakes.

28th October 2006, 05:22 PM	#174
halo0925 diyAudio Member Join Date: Aug 2006	refresh your page, the corrected version is there

28th October 2006, 05:26 PM	#175
halo0925 diyAudio Member Join Date: Aug 2006	Sorry look closer you have the right one, they are correct.

28th October 2006, 05:30 PM	#176
FastEddy diyAudio Member Join Date: Jun 2006 Location: North Californie	" ... refresh your page, the corrected version is there ..." A very good job ... I'll bet your power supply is just about as clean as is possible. The (newer) diagram is now quite clear as well. Wondering: Did you build this entirely from your own design(s)? ... using parts from other amps or purchased "new" ? ... Also: Noticing the double diode, full wave bridge ... What type ?? (1n4004 or other?) Would it be possible to see a 'scope trace of the power supply output?? (Or some kind of measurement indication of what little ripple there is ??) Great job, great design ...