Pics 1983 JCM 800 50 Original?

[gbsmusic]

I don't know if the question will be answered with just this picture but does this look completely original and unmodded? 2nd pic is just for more info.

 

[glpg80]

The pots have all been messed with. Someone’s rewired them. 2-3 of the pots look to be replaced.

Fuses look original but the wiring for them does not. Also messed with.

Board looks original and so does the PT wiring.

 

[psychodave]

I need better pics. ?

 

[gbsmusic]

I need better pics. ?

Unfortunately that's all I have.

 

[glpg80]

Plate resistors all look to be the same and they all look like the correct Phier resistors of the era. Looks legit to me and well maintained.

 

[Racerxrated]

Looks good to me. I’ll defer to glpg80 on the pots….
Nice clean 2204.

 

[RedPlated]

The board is totally original, from what I can see. Pic is pretty blurry.

I always love seeing the preamp heater wiring from this era. Zero effort on twisting the wires. I always had to redo them on 800's.

 

[psychodave]

It looks pretty good as far as I can tell. I'm not 100% sure about the pots being messed with... solder joints look a little big around the tabs and there is missing dye on the joints, so they might not be stock. Board looks good, iron looks good. The bias doesnt looked messed with, so its likely those EL34's are stock making it a UK amp? (USA amps had 6550's during this time?)

 

[232cap]

That’s all stock, looks great. Buy it!

 

[cardinal]

It looks pretty good as far as I can tell. I'm not 100% sure about the pots being messed with... solder joints look a little big around the tabs and there is missing dye on the joints, so they might not be stock. Board looks good, iron looks good. The bias doesnt looked messed with, so its likely those EL34's are stock making it a UK amp? (USA amps had 6550's during this time?)

I can't tell the resistor values from the pic. Not sure if it was a UK market amp or not. I've bought a US market amp where some yahoo just stuck EL34s in without attempting to convert. Sounded terrible until I switched it back to 6550s.

 

[harddriver]

That’s all stock, looks great. Buy it!

Pretty much fully agree, it looks to be all stock. The filter cap look like they might be replaced as I thought they were using Daly or LCR in these years. I like 6550's in these but if you are an EL34 guy those PI grid leak resistors should be 220K for EL34 and 150K if the amp was a 6550 amp. If you have factory Phier 220K there then you have a true El34 factory non USA amp.

 

[burger]

It looks stock and you should buy it. It needs to be checked over by a trusted tech once you get it, amps this old have almost always had something changed in them.

 

[psychodave]

I can't tell the resistor values from the pic. Not sure if it was a UK market amp or not. I've bought a US market amp where some yahoo just stuck EL34s in without attempting to convert. Sounded terrible until I switched it back to 6550s.

Same here.... they look original or at least the original brand (most clowns don't use the original type when doing mods .) I love Master volume Marshalls with 6550's.

 

[cardinal]

Same here.... they look original or at least the original brand (most clowns don't use the original type when doing mods .) I love Master volume Marshalls with 6550's.

I have one stock US market 2204 with 6550s and another US market 2204 that was converted (the right way) to EL34s (not just a piggy back resistor, but actually replacing the four or so resistors to make the swap), and I was surprised that I can actually tell the difference. The 6550 amp is a bit harder and clearer; more aggressive sounding.

 

[232cap]

The black filter caps are stock too.

 

[Racerxrated]

The black filter caps are stock too.

Yep I've had them with the black ones, or the green ones as well. Mostly LCR though.