[Elecraft] K3 Sub Rx RF Gain issue and TX sticking

[dmb at lightstream.net]

You can easily check any of the four potentiometers (RF/AF gains) for
discontinuities via a utility available from the K3's CONFIG menu:

First, turn "TECH MD" ON

Then, find the "SW TEST" option, rotate the VFO-A knob until you see "Scn 
Adc" on the display.

Then, while observing the VFO-B area of the display, rotate your suspect
RF gain control and you'll see the individual steps, which should change
from 002 (fully CCW) through 240 (full CW). Turn it very slowly so that
you can see individual steps, looking for any discontinuities.

73, Dale
WA8SRA


> The RF Gain control on the Sub RX acts weird.  It will seem deaf until 3
> o'clock on the dial.   Once past 3, the gain jumps up and then is linear
> if you turn it down.   This pattern will repeat if you turn off the Sub
> Rx and turn it back on again.  The main RX Rf Gain control is smooth and
> linear all through the dial range.   I have done the RX calibration
> routine on both receivers.
>
> During Field Day, if I hit the Esc Key or the paddle to interrupt a CQ
> (N1MM+) , my external keyer (MKUSB) would stop keying but the rig would
> stay in transmit mode.  Tapping the XMT button would put the rig back to
> RX mode.
>
> Ideas?
>
> --
> Buck
> k4ia  K3 #101
> Honor Roll 333
> 8B DXCC
>
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