[Elecraft] [K3]Sub problems cropping up

[Bill W4ZV]

Jim AB3CV wrote:
> 
> Tonight may have been the first time I checked 40m operation and I was
> surprised to find 40m nearly dead on the sub when the 250hz filter was
> engaged. As I raise and lower the RF gain (set to adjust both
> simultaneously) I find the sub in the right channel loses all band
> noise long before the main in the left ear.
> 

1.  To ensure that most RX settings are identical between Main and Sub,
double tap A>B which will send most Main settings to Sub.  

2.  You said you checked that you were on ANT1 but did you do this on 40m? 
The K3 remembers antenna assignments by band so it could be it is on AUX RF
on 40m.  Go into BSET, tap ANT and confirm that you are actually on MAIN for
40m.  While in BSET confirm that the PRE/ATT setting is the same as you have
on the Main RX.  It's possible to set these separately and it could be you
have ATT selected which would cause attenuation.  If your Main happened to
be on PRE and the Sub on ATT, it would be ~20 dB difference.  Tap BSET again
to exit.

73 & GL!

Bill


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