Here's A Shot Of The Chassis Underside....

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In Reply to: My PAS-3: Pictures and further commentary... posted by crooner on September 17, 2004 at 22:50:45:

I attached a ferrite core to the heater wiring that goes to the phono stage PCB. It should, hopefully, help to reduce stray RF and perhaps hum as well.
I also added a fuse holder. I was about to install a fast acting 0.5 amp fuse. But then, I found out the power switch is a single throw unit, and hence the switched outlets and preamp all share the same wiring. The only way to add the fuse would be to disable the switched outlets or add a new power switch. I postponed this work for later...
Finally, I added a 22uF @ 500V axial electrolytic parallel to the first section of the quad cap that feeds the phono section, in an effort to reduce hum.
A listening test confirmed a very quiet preamp. Still a very slight hum on phono, but completely inaudible under regular listening levels.
Best regards,
crooner

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Follow Ups Full Thread

Topic - My PAS-3: Pictures and further commentary... - crooner 22:50:45 09/17/04 (6)

Some suggestions - Russ57 09:00:39 09/18/04 (4)

Fully agree: old caps = junk! (nt) - serus 22:29:29 09/18/04 (3)

Black Cats are Mylar... - crooner 23:36:58 09/18/04 (2)

Yes and the only thing worse than Mylar... - Russ57 12:00:58 09/19/04 (0)

Re: Black Cats are Mylar... - serus 08:36:51 09/19/04 (0)

Here's A Shot Of The Chassis Underside.... - crooner 22:56:58 09/17/04 (0)

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Here's A Shot Of The Chassis Underside.... - crooner 22:56:58 09/17/04 (0)

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