Sorry didn't mean to disappear just very busy. What are you getting at either end of R218 dc volts?

Ok, check the AC voltage at the black and white spade connectors with reference to ground. What is there?

Not right, should be in the 460-500v area. I think your problems are a tad bigger that they first appeared to be. Can you post a pic of the orientation of the BR's you installed?

Very nice shape. Nice score.

I call BS on the "can't be repaired" number. Here is a pic of a 6100 power amp board that was completely butchered by a Marshall service center and returned to the customer "non-working" and "sell it for parts". 20221111_234347.jpg 20221111_234352.jpg And a few shots after a triple bypass: 20221117_...

Ok, with the power tubes out, you place the black meter probe on the chassis ground and the red goes to pin three which is indicated in this pic. You do this with the power on and standby off ( play mode). Be careful, there is high voltage in there and if you brush up against the top of those big fi...

Gotta back up a bit. This started as the amp was blowing fuses? What fuses were being taken out?

Christ i wish i would have noticed the dates on the beginning threads, necro post revival.

Second order of business is don't automatically assume that these issues are caused by the capacitors and just start changing away. When it comes to power filter caps running high voltages they degrade slowly as in the ESR gradually increases with time which will reduce it's ability to filter out AC...

First off these amps will run a 4 ohm load, you just need to know how to switch the jumpers on the power amp board to change 16 to 4. You switch the black ( 4 ohm) with the yellow (8 ohm) to give you a 16/4 output selector, or you switch the green and black to get 8/4 which coincides with the labeli...

Surf, the last digit in his pic is a #1. What's that mean?

It just sound muddy like every Plexi JTM actually. Nothing wrong with the amp, valves are good and bias is where he is belong. I remembered the same sound in 2007 when they was brand new. It's not a brightness issue either. I already changed things, it's better, but not the exact result I've wanted...

Kladen, if you haven't gotten the logo yet you can get them here:

https://www.amplifiedparts.com/search/n ... go%20white

25w Greenies are awesome. My 1960TV 4x12 that gets pushed by the 87 is friggin mean. Bottom end for days.

When they can get balsa wood to handle the string tension these guys will be all set.......