[Elecraft] K3 Hi-power Transmit limiting

[n6ax at speakeasy.net]

Mine just started that behavior yesterday as well.....the oddest thing...any
ideas, guys?


John




On Sun Feb 12 13:38 , r_zerr  sent:

>I began having problems this morning when I went to check into the Elecraft
>Net. I had my output set at 100W, and I did not have any output. By turning
>it down to around 70 watts, I could transmit.
>
>I went through the transmit gain calibration on 20M and the Wattmeter
>calibration, with apparent changes in the Wattmeter reading (initially at
>31, now at 79...50W into Dummy load, Bird Wattmeter, 100W slug). The
>Transmitter gain changed only slightly, 16 to 17, but is more of a choice
>between high-side, or low side of the meter reading. 
>
>Checked and Bat Min setting is at 11.0V and the KXV3 setting is normal
>
>Other info in present condition: 20M >90W kicks off. 20.4A draw at 90W PA
>temp=33C Voltage @load=12.4V
>
>I checked the behavior on 17M with similar problems, kicks off above 96W
>setting, with 12.8V, 14.3A draw 
>15M kick of above 96W, with 12.6V @ 17.8A
>12M kicks off above 97W, with 12.8V @ 14.1a
>10M kicks off above 97W  with 12.9V @ 13.6A
>30m kicks off above 98W with  12.6V @ 16.5A
>similar results on 40m and 80m
>
>Before I go pulling the top off and checking connections, does anyone have
>any suggestions?
>
>
>-Ron, WT5RZ
>
>
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