You should see about 350-500 milliwatts going to the pa deck and the
bias/control line must be connected properly to the station frame. Many
times I see these stations for sale at hamfests with the jumper wire
allowing the pa to run only full-tilt-boogey, which is why they crash
and burn so often - the control circuit is there to help cut back or
turn off the power when the swr gets bad from someone stepping on your
feedline or the antenna falling away entirely from wind or
who-knows-what. If I remember correctly the bias line is blue 18AWG
wire, sample there in parallel to ground and switch to some 75 ohm
feedline to the dummy load - the voltage has to change or the pa will
burn up at the site. It is really helpful if you have manuals but as you
may notice I do more with sample and trial then draw the schematic and
continue troubleshooting along the path of suspicion, slow but very
informative.
David wrote:
>
> I have a problem. I have a micor base/repeater and over the weekend I tuned
> it up to my frequency and was testing out and I am not getting any power out
> the exciter is producing some power as I can hear the radio a hundred feet
> away with it going into a dummy load. the watt meter tested okay on another
> radio. the pa is getting power and I have tried adjusting the power control
> to no avail. I don't think the triple low level amp is working. but I am not
> sure how to fix it.
--
73...Clark Beckman N8PZD
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