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Old 25th October 2006, 02:51 PM   #171
N-Channel is offline N-Channel  United States
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Default 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
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Old 25th October 2006, 03:28 PM   #172
halo0925 is offline halo0925  United States
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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.
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Old 28th October 2006, 06:06 PM   #173
FastEddy is offline FastEddy  United States
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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.

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Old 28th October 2006, 06:22 PM   #174
halo0925 is offline halo0925  United States
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refresh your page, the corrected version is there
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Old 28th October 2006, 06:26 PM   #175
halo0925 is offline halo0925  United States
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Sorry look closer you have the right one, they are correct.
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Old 28th October 2006, 06:30 PM   #176
FastEddy is offline FastEddy  United States
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" ... 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 ...
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Old 29th October 2006, 01:18 AM   #177
mariofer is offline mariofer  Argentina
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Default Re: Inside

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?
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Old 29th October 2006, 02:48 AM   #178
halo0925 is offline halo0925  United States
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Default 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.
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Old 29th October 2006, 03:50 AM   #179
mariofer is offline mariofer  Argentina
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Default Re: Power supply ?'s

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:

http://www.diyaudio.com/forums/showt...0&pagenumber=6


In the pic you can see four poliester caps over the bridge. And I wondered why (?)
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Old 29th October 2006, 04:26 AM   #180
halo0925 is offline halo0925  United States
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Default 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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