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Marshall 8100 head hum query

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  • #46
    Sorry folks one final update...
    Got the amp back into it's cabinet (I had been re-covering it as part of the project - made a few wee mistakes but can live with it), and it's damn near silent! Remaining hum/buzz must have been from ambient. Amazing result!

    One thing also for anyone browsing this thread in the future:
    I decided to treat it to a new tube on the basis it was the original branded Marshall one in it and was presumably 26 years old. I bought the wee guy a nice shiny new Tung Sol 12AX7 and it absolutely hated it! Boost channel completely washed out in terms of volume and tone. High end was miserable. Swapped back to the old one and everything is great. Wish I had more tubes to test, but not being in the 'biz' I don't have the resources. If it does need replaced in the future I'll just stick with the stock (I think?) Shuguang ecc83.

    Click image for larger version

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