Repair a X300 Antenna

I had a X300 antenna a long time, and on one day the SWR goes up and it doesn’t work any more. I open it and try to find the problem.

IMG_2630
The open X300 in Parts

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This capacitor was the problem. I changed it and it works again.

12 thoughts on “Repair a X300 Antenna

  1. Hello!
    In order to repair my x-300 antenna I would like to know the capacitor value located
    near the antenna base.
    many thanks
    Avraham Sela 4z1iz

  2. Hi Donald.

    Can you please tell me the value of UHF session on top of antenna, a friend have this completely burned.
    If you can help may thanks in advanced

  3. Hola que tal, tengo el mismo problema, es el tercer capacitor que me quema..el ultimo que puse fue de 5pf 3 3kv, el FT-lo puse con 35W y lo revienta!! cambiare el capa y lo usare con 25W…luego les cuento.

  4. su una X300N diamond originale di un mio collega radioamatore che aveva un problema di piano di massa, con la scusa di smontarla, dentro la base ho ritrovato questi condensatori da 2kV.
    Parlando con il proprietario mi ha confermato che lui l’ha comprata nuova, evidentemente Diamond si è resa conto di questo errore e l’ha corretto. Allego le foto che ho fatto:
    https://i.ibb.co/k0mfX4x/1a8205c0-3469-4fdd-929d-9472608a39ab.jpg
    https://i.ibb.co/Kwdppty/19409549-7e6a-4105-a554-c47c88453b17.jpg
    https://i.ibb.co/rFh63Hm/a54e2913-132d-447e-9e9a-1f6ed54119c4.jpg
    https://i.ibb.co/HzvJB7T/afe48b6f-04cf-4c37-9aa9-e3cedf653935.jpg

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