Jim Lux wrote:
> <monster snip>
>
>>>73 Tom
>>>
>>
>>I agree with Tom about reflected power not being dissipated in the
>>transmitters final. For all practical purposes, it all gets returned to
>>the antenna and radiated except for the small amount of loss the
>>transmission line causes from the mismatch.
>
>
> For a tube amp, sure. And for a solid state amp with a tuner on the output.
> But not for a broadband SS amp, in general. While they're not 50 ohm
> resistive, they're also probably not too far away, so the mismatch at the TX
> output isn't going to be all that huge. If there's not a big mismatch, most
> of the reflected power winds up "inside" the TX, and gets dissipated (or fed
> back into the power supply, if you've got an amplifier that can do that).
>
There will be the same degree of mismatch at the antenna that caused the
reflection as there is at the transmitter.
73
Gary K4FMX
>
>>If a tuner was in line and matched the transmitter would never see any
>>reflected power. The tuner does not absorb the reflected power but
>>reflects it back to the antenna.
>
>
> exactly..
>
>
>
>
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