How to Capacitively couple antenna to a tube radio.

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  • Опубликовано: 15 сен 2024
  • Had a viewer ask how to connect and antenna to a radio with a loop antenna. He got a humm when connecting an outside or external antenna. Here's how.

Комментарии • 19

  • @a587g
    @a587g 2 года назад +2

    Good video! I usually place a coil of the end of the antenna wire across the back of a set with a loop antenna. Some of these sets have a capacitor already, going to the external antenna connection! Shows the importance of changing that one (I know a lot of restorers don't bother).

  • @n8nkqrp595
    @n8nkqrp595 2 года назад

    Nice to see ya again! That radio is absolutely BEAUTIFUL. It's design is sooo elegant.. oh man, I want one, and bad. lol. I love your videos. Really fun to watch, calming, and educational. Nice work OM :)
    Summer is here, and with the yard work, the helping of neighbors, the garden, my John Deere 318 project, etc... I also have no time to make a vid! And I'm RETIRED! So I know what you mean. We all do. It's crunch time in the 'states.
    We love your stuff. Don't feel pressured to produce. Family, friends, critters and the dang lawn come first!
    Thank you so much. Take care and enjoy the wx!
    Chuck

  • @Radiowild
    @Radiowild 2 года назад

    Great tip! Tube radios are vulnerable to all kinds of noise and I usually do this when there's a radio carcass under repair on the bench. I'm retired now, and I'm busier now then when I was working........

  • @michaelpruitt6828
    @michaelpruitt6828 2 года назад +1

    Very informative video and a beautiful radio!

  • @stanleygerrick6053
    @stanleygerrick6053 2 года назад +4

    Great video! When you directly connect the antenna directly to the radio, what exactly causes the buzz and why does the capacitor eliminate the buzz? Thanks!

  • @BrumAdam
    @BrumAdam 2 года назад

    Very informative. That's a lovely radio - never seen one like that before.

  •  Год назад

    Excellent video! congratulations! I think that this problem that you describe is due to the impedance of the antenna. If I do not remember more, in those times the impedance of an antenna was 300 ohms. In this case, capacitive coupling can help, and you can just as well use a balum or some RC coupling network. Thanks for sharing!

  • @MowerJunkie
    @MowerJunkie 2 года назад +2

    That's pretty cool! Thanks for sharing.

  • @batman387
    @batman387 2 года назад

    Thanks for the video. I learned a lot. Great to see you. Take care 🙂

  • @lurkersmith810
    @lurkersmith810 2 года назад

    The last Zenith I had that quit working intermittently had a bad 50L6. After it was running a while, the heater would open, and as the cathodes cooled, of course it would quit. Then, the minute I started trying to figure out what happened, it would start working again! It sure took me a while to figure that one out! I look forward to finding out if one of the tubes has a low speed "blinker" for a heater!

    • @45AMT
      @45AMT  2 года назад

      This one has a 35l6 as it's a tuned RF stage job.I haven't got a chance to mess with it but I suspect a flakey tube.

  • @domenicriccitelli498
    @domenicriccitelli498 3 месяца назад

    Do you happen to know what type of capacitor was used and where to get them? Thank you I'm very new at this and can use your help

  • @JWimpy
    @JWimpy 2 года назад

    Very interesting, I had no idea.

  • @terryblackman6217
    @terryblackman6217 2 года назад

    Good tip. Cheers 👍

  • @w5cdt
    @w5cdt 8 месяцев назад

    Sounds like a hot chassis radio.

  • @Newlife-ol6pk
    @Newlife-ol6pk 4 месяца назад

    It's interesting and a bit strange because in most schematics the antenna is connected already though a capacitor...

  • @w2tty
    @w2tty 2 года назад

    Never knew this. Thanks. I wonder why

  • @asbjrnthomsen9986
    @asbjrnthomsen9986 Год назад

    What capacitor you’ve used?

  • @attilarivera
    @attilarivera 2 года назад +1

    I would start with a 10nF capacitor... ceramic capacitor... non polarised.