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This is typical wiring for bias Gary

Are you thinking of new transistor? If so 34 mj21196 with original 4 rca410 or better 4 mj21195’s if you have the nerve and are able you could do some serious upgrades to that puppy PM me if interested or search my dual 500 builds in this forum

I like them wild

Just mine

I’m a 70 year old adolescent

Ok I often mention inductance in supply wires and direction of signal wires in your amp. I think this would be a good place to have us contribute to the truth of how elections flows and how it affects surrounding Components and signals. Does shielding work better than proper routing? Do...

Some JB weld is good solution to the transformer cover These heatsinks are made from zinc I believe so not to easy to reshape I did one that I use here at home with good results using the JB weld epoxy

Here is what I did with bridge rectifier

the film caps Make a difference. They are there to deal with any inductance in the rail supply wires. The closer to the collector of the outputs the better they work. Spread evenly between the four outputs is best.

Yes in parallel and space them apart

[QUOT)E="Oldskoolfan, post: 345809, member: 4520"]What if all you had was a pl400 transformer. Could build a complete WOPL 400?[/QUO I have a transformer on the shelf and thought of how to is it. you can buy am 400 for 200-400 any day of the week so not very practical

Hello interesting layout. Your Mylar .33uf cap need to go from rail to ground . In the photos it appears to me they go from rail to output, but I may not see it correctly. Also you would be happy to add a 1.5uf metal film caps along wi these .33uf caps. I use 2 1.5 on each rail along with a .33...

Was my mind in in the game today Retested with a 8 ohm load Thought distortion was way to low floor noise improved withis load attached I had to use the top AP to generate balanced output , because it’s a balanced setup machine and read the amp out put on the bottom AP

So having been up to the lake house and repairing my boiler I set down to test this new amp well had some issues with putting a ground wire on the wrong pin on the balanced to unbalanced board but that is sorted first the soft start does what I wanted only 4-5 amps to start up Wish I could...

You should look up my thread on reworking the c-500 I did two with great success look for Carver C-500 upgrade to WOPL

When we went to India at a shopping area call Chandni Chowk I was having to avoid wires. As you see my height was considerably higher than the average. The camera shots are at eye height. My wife could always find me as I was 1-2 foot taller than the rest

The only other item on the board is two .33 Panasonic metal film caps on the 12 and 11 pin in for both channels.

Mark they are what came from Joe so not change on my side

Don there is a .1 uf cap right after the regulator along with a 220 uf audio grade electrolytic cap. There is no oscillations of any concern.