Converting Marshall 6101 from 220 to 110v?

[pontiacpete]

Does anyone know if a Marshall 30th anniversary 6101 can be converted to 110v? This one doesn’t have the switch in the back. Can the 2 primary windings that are now in series be wired in parallel for 110v use?

[Jon Snell]

Looks like you can. Don't get the phasing wrong!

[pontiacpete]

Thanks Jon!
can you tell if this sounds correct?
I would attach the brown to the other end of the top winding opposite the blue wire and move the other wire on the lower winding to the blue one.

[pdf64]

If you avoud moving the brown and blue wires from the terminals they’re currently connected to, then you can’t get their polarities wrong.

[Jon Snell]

Leave the brown and blue where they are.
split the winding connection.

[pontiacpete]

Thanks for this information. Now i have to see if I can remove the little board directly over the PT without having to remove the big power tube board and the one above that. I had a broken solder joint on one of the filter caps on the big board earlier and all 3 boards were out. I would hate to have to through that again.