On Thu, 2006-12-07 at 03:26 -0500, Craig Roberts wrote:
> Ken Brown wrote: "Can you turn the TX power output down....?"
>
> Yes -- and doing so will raise the threshold of circuit breaker tripping
> as the power output -- and current draw -- is decreased.
>
> The problem is frequency sensitive, however. The higher the frequency,
> the more readily the breaker trips. The rig acts normally on 3.5, 7 and
> 10 MHz bands, but the problem appears on the bands above and is
> progressive and directly proportional to the frequency. In other words,
> if I lower the power output so that the breaker doesn't trip on 20
> meters, it'll still trip on 15, etc. In fact, it's very frequency
> sensitive. I can set the output so that the breaker stays engaged up to
> -- say -- 29.5 MHz, but it'll still trip at 29.7.
>
> Thanks and 73,
>
> Craig
> W3CRR
>
Makes me wonder if some RF is leaking out the power wires of the
transceiver trip the electronic circuit breaker. A symptom of using
rolled paper capacitors where disc ceramics with short leads are needed
to be used for RF bypassing.
--
73, Jerry, K0CQ,
All content copyright Dr. Gerald N. Johnson, electrical engineer
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