Yaesu FL-2100B SWR in standby

Discussion in 'Amateur Radio Amplifiers' started by N8VIL, Jan 10, 2016.

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  1. G3YRO

    G3YRO Ham Member QRZ Page

    Yes, I mentioned earler that it's better to replace the wire inside that goes to the relay with coax.

    Roger G3YRO
  2. 9BC357

    9BC357 QRZ Member

    ok this doesn't work either.
    Even though the coax to the input of the tubes is grounded, it still wants to take off and draw power.
    This is defiantly no good.

    I'm just gonna live with the 1.5 pass-thru match, forget it.
  3. MM0HDW

    MM0HDW Ham Member QRZ Page

    We experienced poor SWR readings on one of these on all bands with a SWR meter in the feed from the radio we were using as an exciter.
    Many sites saying change caps on coils, did this, no better.
    We then removed caps on one coil at a time and replaced with ceramic trimmers, adjusted for zero swr, measured the values required and
    fitted as near to the found value a possible. Now all is well with the amp, values were quite a lot different from circuit.
  4. W1QJ

    W1QJ Ham Member QRZ Page

    It would be a good idea to publish the values of the caps needed for each band as this is a universal problem with these amps.

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