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ar-15

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    Heathkit AR-15 refurb

    I am refurbing my Heathkit AR-15 that my brother and I built 48 years ago, and am trying to clean up the hiss coming from the preamps. I think that the transistors should be replaced, and it uses: phono preamp: MPS6520, 2N3859A control preamp: 2N3393, MPS6517 Any advice on which transistors to...
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    Heathkit AR-15 with Speakers

    Hey. I am posting for the first time. I have a Heathkit AR-15, built it, with (2) Heathkit Speakers in a (2) home built speaker cabinets, 3/4" stained Birch Plywood (Heavy). The unit was working fine, then it needed some slight "hand tapping" when in the FM mode. From what I have been...
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