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  1. Marshall Origin 20H Tube replacement

    Amp Building/Technical/Repair
    Hi, I play through a cranked Marshall Origin 20H with a G12 Greenback speaker. I was planning to replace the current EL34s with 6CA7s once they wear out. Is this a feasible option, or would I have to adjust the bias?
  2. Combos vs Heads... Dum question?

    Amps and Cabs
    So, I've wondered for the longest time about what makes someone choose an amp head over a combo version of the same amp. Wouldn't having to carry two separate things (amp head and cab) a pain? Seems like carrying a combo would be easier but quite a few of the gigging musicians I follow use amp...
  3. Heat Sink for a Transistor amp

    Amp Building/Technical/Repair
    I'm looking for a cheap heat sink for a 60 watt bass guitar transistor amplifier that I want to restore for a fun project. Judging from the markings on the chassis and the opening where the heat sink once was it was about 8" long and 3" wide. The heat sink should be able to dissipate 60watts...
  4. Vibration Technology Ltd. 4M 140 Serial # 1252

    Amps and Cabs
    Hello fellow humans , I just brought home a " Vibration Technology Ltd. 4M 140 Serial # 1252 ' amplifier. I have yet to find any useful information on this product other than it was manufactured in Scarborough, Ontario and that the company is no longer in business. Could somebody please help me...
  5. Local stores to pick up random components

    Amp Building/Technical/Repair
    Hey guys. Ever since the demise of RadioShack it has pretty much become impossible to buy electronics components locally in many places. Certainly here in Nova Scotia Where are some good places to buy various decent quality components (1/4 jacks and plugs, solid strand wire, pots, switches...
  6. The Official "I Built This Amp" Thread

    Amp Building/Technical/Repair
    Lets see some of those creations folks. A little story of the build would be nice as well
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