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  1. tusntuk2

    Need help figuring out probable oscillation in SWR Studio 220 Bass Amp.

    I'm restoring an SWR Studio 220 bass amp. The amp had a bad hum, so I replaced all diodes, zener diodes and all electrolytics. I boosted the main caps from 4700 to 6800. Grounding is a possible hum issue due to the design, but more on that later. When I powered it up (DBT) it seemed to whine...
    • tusntuk2
    • Thread
    • bass amp bass player oscillation studio 220 swr
    • Replies: 8
    • Forum: Solid State
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