72 Marshall Bass 50w

[kinhcansg1234]

I've had this a couple of days now, but I've been ill, so I haven't had a lot of time with it :dead:

Anybody got any idea what "ENG M635 BASS" on the inspection label means? (it's right beside another word, "Rosemary" )

Anyway, the first thing I did was stick in the RICH master. The only other change I've made is I've moved the neg feedback wire to the green 8ohm tap on the selector. I also installed some 1 ohm resistors on the output valves for biasing.

 

[Wally]

I've had this a couple of days now, but I've been ill, so I haven't had a lot of time with it :dead:

Anybody got any idea what "ENG M635 BASS" on the inspection label means? (it's right beside another word, "Rosemary" )

Anyway, the first thing I did was stick in the RICH master. The only other change I've made is I've moved the neg feedback wire to the green 8ohm tap on the selector. I also installed some 1 ohm resistors on the output valves for biasing.

I have no idea, but I will bump with a wild a$$ guess could that signify that the amp was set up for English distribution with EL34 power tubes instead of 6560s which were used in US.-bound amps???.

And welc9me....

 

[Sol]

My own 1973 50 watt has Rosemary's signature, simply confirming that she has passed the amp section she was responsible for, allowing distribution to the outlets Marshall used at that time. I forget what part of the amp she was signing off on but her signature has become a curiously desired feature, for reasons not exactly clear to anyone. Nvertheless I love this sort of romantic ephemera that comes with these classic amplifiers..

However on a practical note I would guess that Wally has put his finger on the truth..