Jcm 800 & p50jm-475

[yohanmishkin]

Hi Everyone!

I'm in the midst of a JCM 800 build and I'm trying to wire up my Mercury P50JM-475 but I want to make sure that I'm doing it correctly so I don't ruin the expensive piece of metal. I contacted Mercury and they can't help me further.

In all of the layouts I've looked at I cannot find a PT with the same leads as the 475 so I'm nervous about where I'm putting everything.

Inputs:
Blue -> Comes from IEC socket
Black (120 V) -> Goes to voltage selector
Orange (230 V) -> Goes to voltage selector
Yellow (245 V) -> Goes to voltage selector

Outputs:
Red (365 V) -> Goes to circuit board
Black (B+, 0 V) -> Goes to ground
Red (365 V) -> Goes to circuit board

Black (6.3 V) -> Goes to V5
Brown -> Tied off (goes to nothing)*
Orange (6.3 V) -> Goes to V5


* This is what the guys at Mercury told me to do if the indicator light didn't have a center


Thanks a lot for the help in advance. Any insights would be a great help.

- y

[big_teee]

Hi Yohan:
Sounds like standard Marshall colors.
I've been building on a 2204 and used the Clasic Tone Transformers.
See If it's like this one.
I think your brown will go to ground.
http://www.classictone.net/40-18023.pdf
If there is any doubt try check with a Ohm meter.
Make sure all power is removed and everything is safe before you check.
Good Luck,
Terry

[yohanmishkin]

Terry,
Thanks a lot for the help! I'll keep you posted.