Thanks Anks,
I messed with the amp for a few minuets this morning and have it up and running on all three channels. It had a small amount of hum and I fixed that issue. The EL84 are running at 35.2 ma, 35.6 ma, 33.4 ma, and 38.0 on the last tube. They should be running at around 28 to 30 ma. These are new JJ's but I did not buy them as a quad set so I will buy a set of better matched tubes. JJ did some R&D into El84's that had lower plate dissipation which I may like to try. The normal El84 has plate dissipation of 12 watts and the new tubes they are making are at 9 watts. The idea being that they will break up at lower volume. I had in mind to use this amp at home and don't want or need a loud amp.
I am running it into a Marshall stack with four Celestion speakers at 8 ohms at the moment . Perhaps not the best choice of speakers for this amp...don't know..I have no idea what the amp sounded in it's original combo case or even what speakers Mesa normally used.
Got some research to do...lol
For sure I would like to know how you went about installing bias pots.
The tubes are running at around 260 F or 126 C which seems a bit hot. I have seen some other EL84 based amps that run hot as hell and having no experience with this one I have no idea what is normal. The JJ data sheet does not give a max temp for the El84's. I have not measured the plate voltages yet. The chassis is not grounded to the PCB so I need to find a good grounding point. Input jack I guess.
I need to read the owners manual really well as the controls and their interactions are a bit complex for sure.
Are you using the original United Chemi-Con 220 uf 300V filter caps? I have not checked the ripple or how much AC they are leaking if any yet.
Update: I have everything working on the amp now...sounds OK...300V on the plate of V3 which seems a little high.
Looks like a good tune up and build a foot switch and find a reverb tank and this beast will be ok..Well... there is the issue of building a cabinet to put it in....oh well
Billy