[AMPS] explain this one

[Tom Rauch]

> If the tank is resonated with too-light loading, the 'loaded' Q of the
> circuit will be much higher and so will the voltage.  This can happen due
> to an inexperienced operator or antenna switching mistake, etc.  I think
> the bandswitch doesn't have a great enough margin of safety.

You are correct Vic.

The voltage will soar to whatever value necessary to until 
something absorbs the power.

It is virtually impossible to build a tank that will withstand voltages 
with no load at full drive.

One of the demonstrations I used to do was with a MRF-150 FET 
running at 12 volts, driving a tank with a loaded Q of ten. When the 
the load is removed the tank voltage goes to over 100 volts on 
peaks.

   


73, Tom W8JI
w8ji@contesting.com

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