Home Forums Electronics Restoration radio tube questions?

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  • #1071
    stanrectifier5y3
    Forum Participant

    good evening too everybody out there on this site.,,, my name is stanrectifier5y3.,,, just stan for short 😳

    #1073
    phil
    Forum Participant

    have a look at this webpage for now, on Recapping.
    You really should replace the capacitors in the power supply, it is common for them to go leaky or to short which could take out the speaker field coil or do other damage. there is a good document on this here ;
    https://www.antiqueradio.org/recap.htm

    The speaker voice coil wires can sometimes be used to instead run to a permanent magnet speaker. ( iin a pinch) The field windings in the origional speaker need to be there as they play a role in in the power supply and are used as a voltage drop.
    it might be possible to replace the field coil with a big resistor. for a big console like that it is usually possible to find a speaker that is a match.

    after recapping the set you chould go over the resistor values and replace any out by more than about 10 percent.
    The European set will need the same treatment. it is probably an FM set and that introduces more complications for allignment. change out the power supply filters and all those leaky cardboard caps and it will probably work better.

    write back after you have done that and let other readers know how you are doing withit and if you have other specific questions. If you like you could bring it to the next radio club meeting in your area , usually others will help with parts and advice.

    the tuning eye is likely gone dim if you haven’t replaced it. they usually do go bad from the sunlight affecting the tube.
    they don’t last forever. it may work, but very dimly if you turn the room lights off.

    Phil

    #1074
    Dan Walker
    CVRS Member

    If your rectifier tube glows purple that is a indication that the filter caps are leaking or there is a problem with the high voltage[200 to 400 volts] between the positive and negative terminals of each of the filter caps. It could also be a bad rectifier tube. Here are a coulpe of books that I found to be excellent in helping to repair antique radios and they are listed on ebay many times.””Old time radios; restoration and repair,by Joseph J. Carr’,,,and;;Antique radio restoration guide 2nd edition,,,by David Johnson…I have found both to be very helpfull…. another book which I highly recomend and I think is the best is PRACTICAL RADIO SERVICING by William Marcus/Alex Levy. The library of congress catalog card number is 62-10247.I hope I have been some help but I am new to radio repairs so get those books and read up…..GOOD LUCK Dan

    #1125
    Robin in Kansas
    Forum Participant

    Have you tried the site of Son’s and Father’s Hobbies at http://www.sfhobbies.com/sfhobbies/radio/emailus.jsp?
    They have very many Sears & Roebuck repair sheets that I’ve never seen anywhere else. They are totally devoted to Silvertone radios and have helped me to identify some very strange looking old radios.
    It has been quite some time since I last contacted them and they provide a service for a fee.
    They will let you know how much information they have and how much it will cost to obtain it then you decide if you want it or not.

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