Thursday, 11 June 2020

Maestro FRB-1 Full Range Booster

With added voltage doubler since original units had two 9v batteries.


6 comments:

  1. Are the 2 100uf caps for power filtering? Are they both necessary?

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  2. Necessary, yes. The upper 100uF cap is indeed for power filtering, and since higher voltage brings the potential for more noise, it's a keeper. The lower cap is part of the bias circuit for the LM741, so that's also a keeper.

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    Replies
    1. Copy that. I didn’t see either one on the original schematic.

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