I could I suppose build a tone osilator to run between the radio and the 
antenna, that wouldn't be too hard, take apart an old vswr meter and 
drop an osilator and speaker in in place of the guts of the vswr meter.

Shaun
web sites:
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On 20/03/2008 12:27 AM, the old scribe known as Howard Kaufman was able 
to impart this pearl of wisdom:
> I'd trust the attenuated rx more than the marked knobs.  Something like rain 
> might change the tuning, and your marks wouldn't be accureate.  I don't know 
> why you are trying to read the internal meter, rather than the watt meter 
> outside the radio.  If you do it that way, you have a system that you can 
> use to tune any radio, not just one. 
> 
> 
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