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  • Hammond H-AO-44-3 advice request

    Hey everyone - thanks for reading.

    I've got a Hammond H-AO-44-3 Reverb amp that is missing the 6gw8's.
    I'm not inclined to replace them as the tubes are becoming more expensive daily.
    However, I'm considering swapping some sockets, drilling new ones, and essentially just using the chassis and transformer, and maybe the original 6CA4/EZ81 rectifier.

    Before I do this, however, I'd like someone that is more "fresh" on their knowledge to review my idea and see if it would work. Mainly, I'm just trying to determine workable tube swaps for the 6gw8's.

    Original:
    6gw8 x 2
    6CA4 x 1

    Proposed:
    5879 x 1 (I love a gibson GA-40)
    12ax7 x 1
    6AQ5 x 2
    6CA4 x 1

    From looking through datasheets, it looks like I'll potentially draw a touch more heater current than the original - 2.35 vs 2.32 stock. But that seems negligible as tubes seem to vary anyway. I'm a bit more concerned to be sure that I have enough DC current available. However, from what I can glean, it appears it should work. Anyone see anything I'm missing?

    Thanks for your time,
    Jeff

  • #2
    Have you considered rewiring for 6BM8s. They are not nearly as expensive as the 6GW8s.
    In that case you would only need the 5879 and the 6CA4 to make things happen

    SG

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