carl seyersdahl wrote:
>
> I am working on a well known amp (tunes 160-10mtrs) and the 80 mtr. portion
> of the coil (160 and 80 are a separate coil) was apparently overheated and
> "bent" a bit , altho it doesn't appear to be damaged. My question is why has
> this happened.? My guess is that maybe the amp was "overdriven" or
> "underloaded", and thus had too much circulating current.!!! Can anyone shed
> some light on this problem ?? The owner has said he uses a tuner , swr mtr.
> etc to load his antenna on 80 so it wouldn't seem to be a loading problem,
> but I'm just not too sure. !!!
Even if he used a tuner and the amp saw a 50 ohm resistive load, it's possible
that he didn't have it loaded heavily enough (he just misadjusted the loading
capacitor). Maybe he used the amp at full power on RTTY or AM?
Vic K2VCO
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