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YAESU FL-2100B - under powered with 1600 V

Discussion in 'Amateur Radio Amplifiers' started by F8BDX, Nov 25, 2017.

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  1. F8BDX

    F8BDX Ham Member QRZ Page

    to protect a can my FL-2100B:
    taking a middle point of the transformer
    which gives me 1600V of flat Voltage.
    a good solution ?
    thank you
  2. G3YRO

    G3YRO Ham Member QRZ Page

    What are you saying . . . reduce the HT voltage to the 572Bs by modifying the PSU?

    Bad idea ! It would work really badly then.

    Not only would the output matching be all wrong . . . so would the input matching.

    What are you worried about? These are pretty well-built amps . . . I used one for 40 years and never had a problem. (sold it recently to buy a TL-922)

    Roger G3YRO
  3. F8BDX

    F8BDX Ham Member QRZ Page

    Hello Roger
    I use a translator, sorry HI
    It is a friend technician (F5UL, sk in 2015) who told me that it was not to make him suffer in temperature, the Transformer, and other components.
    OK, I'm going to reconnect it to 2400V
  4. F8BDX

    F8BDX Ham Member QRZ Page

  5. G3YRO

    G3YRO Ham Member QRZ Page

    I have never known the Transformer fail in these Amps . . . and even the electrolytic capacitors seem to go on and on. (I never replaced mine)

    However . . . the whole Amplifier DOES get hot if you are using it a lot (like in a cw contest) . . .

    So for contests I used to sit a big 12cm 240V fan on top (above the valves) to suck all the heat out . . . it would make a big difference !

    Roger G3YRO
    N8VIL likes this.
  6. F8BDX

    F8BDX Ham Member QRZ Page

    TNX Roger, 73

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