Rich,
Yes, that is abnormal.
Either your power supply is sagging or there is too much voltage drop in
the power cable.
To figure out which it is, measure the power supply voltage at its
terminals during transmit. If it is staying "right up there" as it
should, then the problem is in the cable. Check that the power supply
terminals are tight, check that the fuseholders have good contact with
the fuses (change the fuse(s) because they can develop a higher than
normal resistance. Make certain that the APP connector on the K3 end of
the cable has its contacts fully inserted - the tip of the connector
blade should be latched over the spring finger below it. If you can see
both the spring finger and the tip of the contact blade when you look
from the front, the contact blade is not fully inserted.
73,
Don W3FPR
On 10/26/2015 11:48 AM, Rich wrote:
Folks,
I am not sure if I have some sort of issues or not. My K3 shows
13.7VDC on RX. When I TX that reading drops to 10.9VDC. Is that a
normal drop? I do not believe this is a K3 issue, but I was wondering
if others see that much drop before I dig into my 12VDC supply system.
Thanks
Rich
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