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    diodes on the secondaries

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    baddog1946

    Posts : 304
    Join date : 2010-02-03
    Location : Costa Rica

    diodes on the secondaries

    Post by baddog1946 on Sat Dec 11, 2010 12:34 pm

    Hi Bob: (and everyone else)
    I was reading the M-125 thread and I noticed that you mentioned at one point that one could put diodes on the secondaries of the trannie to prevent reverse current flow if the amp was switched off and on quickly.
    Could you put up a little diagram of that for a look at what you mean?

    This happens here with a lot of quiick power outages. It might give me a little security.
    Thanks
    Baddog1946

    Bob Latino
    Admin

    Posts : 2378
    Join date : 2008-11-26
    Location : Massachusetts

    Re: diodes on the secondaries

    Post by Bob Latino on Sat Dec 11, 2010 6:19 pm

    Hi Baddog,

    That modification of putting diodes on the rectifier tube socket is mentioned in this thread here on the Dynaco Tube Audio Forum. There is a diagram on that thread which shows where the diodes go on the tube socket.

    Rectifier tube socket mod

    Bob

    bigmm79

    Posts : 23
    Join date : 2010-09-15

    Re: diodes on the secondaries

    Post by bigmm79 on Wed Dec 15, 2010 11:23 pm

    So I'm planning on doing this mod as I've already blown through a GZ34 after a couple months use. I have a question that is probably dumb, but I'm an electronics ignoramus. With diodes installed as discussed aren't they then rectifying the AC signal into DC? Does the GZ34 even do anything with the diodes installed this way?
    Any chance of loosing any tube magic imparted by the GZ34 with this diode modification?

    I saw a post somewhere that said if diodes are installed this way one could simply jumper out the GZ34. Can't be right, but I'm curious.

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