K3S Fault

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K3S Fault

holohaj
Just in the last few days my K3S (Serial No. 11048) has developed a fault whereby there is little or no power out on the 12m and 10m bands even into a dummy load. All other bands are fine. Any help would be appreciated.
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Re: K3S Fault

Mike K8CN
The lack of output power on both 10 and 12 meters suggests a problem in
either the lowpass filter (post-PA) or bandpass filter (pre-low power PA),
which in both instances is common to those two bands.  I would check relay
activations on the input and output sides of both the BPF and LPF 10/12
meter filter sections to be sure that those filters are being selected.

You should try to listen on 10 and 12 meters if you have an external signal
source (signal generator or another transmitter into a dummy load with a
length of wire for a RX antenna near the dummy load) for those bands - are
you able to hear a test signal?

And the most obvious suggestion, which I would check first: do you have the
proper antenna port selected on the front panel? (ANT 1 or ANT 2)  The
antenna port selection is band-specific.  Presumably, the proper antenna
port was selected for the dummy load test you ran?

73,
Mike, K8CN





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Re: K3S Fault

KeithWE6R
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In reply to this post by holohaj

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