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  1. M

    Marshall Jubillee amps

    I sorta miss my Jubillee amp, which from memory, I bought back in the late '80s?. It was a good lookin' light grey tolex combo with 2x12s and had a great tone, though it did have an odd red footswitch for the dirty channel switching. Anyone out there got one of these babies -what's you...
  2. M

    First Attempt at Biasing....Are these values OK?

    Don't ask techs to dumb things down..we don't learn that during our training, though it would make fixing things a lot easier:naughty:
  3. M

    JCM900 Reverb Issue

    I found a fractured solder connection on a friend's reverb tank (in his Marshall that is) and a quick resolder of the joint fixed the problem.
  4. M

    JCM 900 cut out turning volume down

    It's not always the valve's fault! For a twenty year old amp, check the FX loop jacks (if not being used) and FX gain pot are not dodgy as it can cause things like that to happen, and by now, many of the power supply electrolytic capacitors will be getting tired. If you're not an amp tech, I...
  5. M

    Breaking in a speaker? How?

    To break-in or not to break-in a speaker, that is the question. What classic guitar recordings were made with new amps with new speakers and what ones were made with old worn-in amps and speakers?? A bit of both I suspect.:hmm:
  6. M

    Effect problem with Marshall JCM 900 Hi Gain Dual Reverb

    Some useful info mentioned.. definately the FX loop gain pot on the back panel can be a cause of this kind of problem, as they can become scratchy. A quick trip to a tech is the best bet..get the FX jacks cleaned up and the gain pot cleaned or replaced -a simple job and should cost very little.
  7. M

    Who plays through a 900?

    I've been using all sorts of Marshalls since the '70s and I'm currently using a 91/92 JCM900 100w dual reverb combo with 2x12s ( G12T 75 and G12M 70)and I can't really fault it. I bought it for a good price, well used and a bit dirty, and it nails certain "classic" hard rock styles cranked up...

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