George Wright WPL-20

[Paul Birkeland]

You have multiple photos of that resistor.  It is where it is, either you leave the one there that came with the amp or you pull it out and put a different one in there.

[robertod]

ok, thanks.

Completed one amp, after re-soldering a few connections and adjusting hum pot can't hear the hum from listening chair.  Will work on second amp after I get a few things done at work.  Will update status soon.

Thanks,
PB

[robertod]

PB,
Upgrade/mods. on the Wright Sound 3.5, 2A3's complete.  The hum is gone, can't hear it from listening chair. The music, I can hear the difference and I know only with time (100hrs) the caps will break in and even sound better.
Thanks PB for all your help.
Roberto

[Paul Birkeland]

I'm glad you got it all sorted out and the hum is gone.

[seattlemagpies]

Hi There,

I just picked up a WPL20 but it's missing its external power supply.  I'm looking for specs, circuit diagram, etc, anything that can help me build another one.

I found a website that allegedly has the circuit diagram (contact for access), but appears to be defunct.  (audiocircuit . com)


So, I thought I'd ask here.  I can't image the layout for the PS is that complex, maybe just some detailed pics of the circuit and components might allow a deduction of the design.

Any help greatly appreciated

[Paul Birkeland]

You'd be best off buying another WPL-20 and cloning its power supply for yours.

[seattlemagpies]

I'd be open to that, if it was even possible to find one...

[robertod]

sent you pm