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  • #16480
    Joseph Skrypka
    CVRS Member

    Hi guys
    I’m bringing an RCA A39 radio back to life. I’ve recapped all of the electrolytic and wax/paper caps, and replaced all of the out of spec resistors (about 1/3 of the resistors). I’ve not changed any of the mica caps (there are many).
    It has come back to life (it was dead), but the audio quality is quite raspy.
    I have the technical information, it’s good, but does not have voltage information, which I find odd – does anyone have access to point voltage information for this radio?
    Can anyone give me direction on where to look for a possible reason for the raspiness?
    The tubes all test well.
    I haven’t re-aligned the radio yet.
    Thanks for any advice that you folks may have!

    #16481
    Joseph Skrypka
    CVRS Member

    I’ve attached a copy of the schematic. The entire file was too large to send.
    Joe

    #16483
    Dan Walker
    CVRS Member

    I have found that once the radio is aligned it usually makes quite a difference.
    I have the rad books on RCA, so I will have a look
    Dan in Calgary

    • This reply was modified 1 year, 4 months ago by Dan Walker. Reason: added information
    #16485
    Dan Walker
    CVRS Member

    I did check my books and there are no voltages for that model
    Dan in Calgary

    #16486
    garykuster
    CVRS Member

    Looks like all the info is at Radiomuseum.

    https://www.radiomuseum.org/r/rca_victor_a_39.html

    #16487
    Joseph Skrypka
    CVRS Member

    Dumb me. I found the voltages on a separate page in the document that I had downloaded so I’ll check them out later today.
    Any other ideas on the raspiness before I do any more? It kind of sounds over-driven so dealing with any over-voltages may fix that problem.
    Failing that and an alignment, are there any other typical reasons for a raspy sound?

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