A One-Tube, Push-Pull Transmitter

Yesterday evening, I was trying to make some WV QSO Party contacts, with the hope of reprising my victory in 2004 (I was the high scorer from the state of MI). Unfortunately, either the skip was too long or there just weren’t any WV stations on 80m CW.

So, I started tuning around and heard Bill, K4JYS, calling CQ. We had a very nice QSO, and it turned out that Bill was using a homebrew, one-tube transmitter using a 6A6 tube. I Googled “6A6 transmitter” and found this circuit. Apparently, it can be made with many different types of dual triode tube types. Here’s another site with information on this type of transmitter.

The transmitter had a very nice note with only a little bit of chirp. Bill said he was using 16, 9-V batteries connected in series for the plate supply. I think that helped keep the plate voltage quite steady and thereby the chirp to a minimum.

Anyway, yet another project to put into the queue.

Comments

  1. I am not a ham but got interested in tubes and built a dozen or so tube guitar amps over the last 3 years. Needless to say I am hooked. I recently started to learn Morse code. I will probably sit for the Technician license at some point.

    I saw your 1936 Jones transmitter. Pardon the stupid question but does the transmitter work gor different frequencies? Is there a simple tube receiver that might work well with this transmitter? Thanks

  2. Dan KB6NU says:

    I just did a quick Google search and came up with this, “A Three Tube Regenerodyne Receiver” by Gary Johanson, WD4NKA. The URL is http://www.qsl.net/wd4nka/TEXTS/REGENf~1.HTM.

  3. Mike Devivo says:

    Hi, What is the besr way to couple this transmitter to an antenna? I currently have an inverted V fed with coaz. Can I use a tuner and feed to coax or would a single lead or twin lead be better>
    73,
    Mike

  4. Andy Eliason says:

    Mike,

    The output turns on the coil are low z and can be connected directly to the
    unbalanced coax with good results. I’ve built Sandy Blaize’s 50JY6 PP
    transmitter which is identical except for discrete tubes instead of a dual
    triode. This is truly “The Magic Circuit” as described by Arnie Coro of
    RHC.

    73,

    Andy
    KA9DOL

  5. Mike Devivo says:

    Hi Andy, Sorry I tool so long. I’ve been working on some other things. Thank you for the information. I just may make it.
    Tnx and 73,
    Mike
    N1CHP

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