late 60s Marshall JMP

shagual

Junior Member

Join Date: Aug 2008

Posts: 20
- Share
- Tweet
#1

late 60s Marshall JMP

11-06-2010, 07:57 PM

I'm having a look at a late 60s jmp 1987 model.

Can someone help me with dating the amp or estimating its value?:

- SN: S/11170
- No bias pot: 68k bias resistor instead of the 47k + 25lin pot
- I believe it's completely original only 1 resistor( v2 bias) + power tube socket have been replaced.

thanks.

Last edited by shagual; 11-06-2010, 08:04 PM.
Tags: None
Chuck H

Bent Member

Join Date: May 2007

Posts: 20110

Location: pacific north west
- Share
- Tweet
#2

12-11-2010, 07:13 AM

is there a letter following the serial #?

"Take two placebos, works twice as well." Enzo

"Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

"If you're not interested in opinions and the experience of others, why even start a thread?
You can't just expect consent." Helmholtz
Comment
shagual

Junior Member

Join Date: Aug 2008

Posts: 20
- Share
- Tweet
#3

12-11-2010, 09:08 AM

Amp has been sold in the meanwhile for 2200euros

Apparently it was an early '68 plexi 50w.
specs: no bias pot, B+ voltage was around 440dc
Comment

Ad Widget