Tube Amps / Music Electronics
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|previous: Ian I have an early 70's MkII 50 watt h... -- 10/17/2000 6:49 PM||View Thread|
|10/17/2000 8:51 PM|
|M Cook||Re: Dating 70's Marshall amps|
According to the chart in Pitman's book, the letter F indicates it is from 1974.
The prefix of your serial number should probably be S/A.
I don't know what year Marshall stopped using PTP, maybe Trace, Rebel, or one of the other Marshall guys might be able to help.
P.S. Here's one for you. I've got a 100W Super Lead that I can't easily date. Someone changed the face plates from the gold metal panels to a dull silver/aluminum metal panel, silkscreened in gold all of the markings for the controls & jacks. However they silkscreened the serial # on the back panel without the letter.
I've talked to a few people about it and the best we can come up with is ~1973. This amp has a small lettering, white logo on the box, 2" laydown PT (500V on the plates), 6 50/50 LCR caps (not caps inside the chassis), metal toggle switches for power & standby not plastic rockers, and holes for 4 speaker jacks.
PLEASE don't think that I did this to this amp. When I bought it it had an unwired pot beside the toggle switches and above it the panel is labled Pre-Vol. It also had an active effects loop installed with level controls in two of the speaker jack holes. I've since brought it back to the stock 1959 circuit.
Any takers on dating this amp?
|Tim Swartz I've not seen LCR caps on an amp th... -- 10/17/2000 9:40 PM|
Ian Thank you Michael for the