Rick Stealey wrote:
> how do I check out the unit to know if its
>
>>> still good?
>>>
>>>
>
> You take a power supply that puts out 800-1000 volts, put a very large
> resistor in series with a microampmeter, and attach it to the output coax
> connector (the antenna side). There is a gas tube inside from this point to
> ground.
None of mine have gas tubes. They have a solid state device.
> It is an open circuit until the breakdown voltage is reached. So as you
> crank up the voltage and watch the ampmeter suddenly it will go from zero
> current to a value limited by the resistor. A kw polyphasor will begin
> drawing current in the 600-800 volt range.
> If it is blown it will never draw any current.
>
Or it'll be a dead short.
The ones I've had fail did neither. The only indication was a high SWR.
Stick an antenna analyzer on it with a dummy load on the antenna side.
If the SWR is high it's bad.
It may actually require power to show it's bad. The two I had that were
bad, "heard" signals just fine, but when I'd transmit the SWR was about
5:1 when it was otherwise around 1.2:1
73
Roger (K8RI)
> I didn't look up the model number of your unit to see if it is a 2 kw or a
> low power unit. The high power one breaks down as I indicated above and the
> low power one probably in the 300 volt area (give or take a couple hundred
> volts !)
>
> Rick K2XT
>
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