I do the exact same thing on my ‘71. V1 is the normal channel preamp tube (I never use that channel) and V5 is the tremolo tube (don’t use that either).
Removing them both adds preamp gain and give the amp a bit of a hotter sound.
The Avenger might get you in the ballpark, but the Decatone doesn’t come close to JCM800 tones - it’s got its own unique sound. I owned and gigged one for years and it never scratched the Marshall itch.
IMHO, a PR doesn’t have enough headroom to really be flexible, beyond playing at home or studio work. A DR with pedals like an OCD and a FDII, and a good Celestion can cover a hell of a lot more ground.
That’s what I went with. When all of my Marshall’s are gone, the DR will be the last one...
If it were me, and I've been there (Germino Club 40), I'd absolutely go for EL34's and a GZ34 rectifier with an optional switch for a SS rectifier. To me, that's the best of both worlds for JTM50 and 1986 JMP.
You already have a BBRI, so go EL34 with this one.
IMHO, you have to remember what else was HUGE at that time: Aerosmith, Kiss, etc. Then the Boston album comes out: it’s an Analog tape album recorded in a guys rented house (for the most part). IT WAS UNBELIEVABLE. Even forgetting the songs and the playing, that album set new standards for...
When I had my silver-back EL34 NR Shiva, I had a mix of Tung-Sol and Electro Harmonix preamp tubes. There should not be any issues pulling the chassis out. Once the screws are out, just turn the head upside down and slide the chassis out.
Hey y’all -
There’s a 3rd Power Majestic 40 head for sale locally that I’m interested in. I can’t find anything about this amp in the search bar.
Does anyone have any experience with this amp? Seems like a cool amp that can blend AC30 and 1986 tones.
I gigged a silver-back EL34 NR Shiva that had a factory variable boost mod for about 10 years. Prolly did 350 gigs with it. The original amps are definitely less flexible, but absolute tonal beasts. I made the special cable and always used a TC Nova Reverb in the loop. That would be my...
I have a ‘71 Deluxe Reverb and my experience has not been like yours at all. My amp is an absolute monster with a Fulltone OCD in front.
IMHO, you need to do 2 minor things to reclaim your amp: have it serviced by a good tech (filter caps, etc) and clip the damn bright cap. We’re talking like...
R2 is exactly why I moved on from the Mark IV. In a channel switching scenario, I could never get a good rock sound out of it to work as the rhythm with R3 as the lead, without R1 suffering.
R2 was great for SRV type stuff but when I set it where is needed to be to rock, then R1 sounded bad.
That looks amazing and the quality of your work looks top notch, but you now have a 2204 clone in a vintage chassis and shell. I don’t understand why you’d choose to rip out the iron and pcb from a vintage amp - it couldn’t have all been junk.
I don’t mean you any disrespect - I just don’t...
It’s not a PCB rework. He completely guts them and drops in a “handwired” circuit. If I was in this situation, I’d look hard at the Alessandro. IMHO, the ‘64 Custom is too much money for what it is.