In Reply to: RE: Eico HF 30 rebuild, hums badly... posted by gkargreen on December 23, 2015 at 08:39:16:
there was a suggestion about the grounding of the filaments which are normally grounded via the outboard preamps which I missed, once the filaments were grounded the majority of the hum was removed!
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Follow Ups
- problem solved! - gkargreen 12:44:49 01/08/16 (0)