Hi, Some times in contests the K3 sub RX goes deaf on 40m with just a lot of
noise, but this only occurs when the A VFO makes a freq jump (grabing a
mult) from below to above (or close) to the VFO B freq I think?
Most often this happens at 7025 but also seen at 7035.
The P5 show signals and the main RX is OK but the SUB RX is just noise and
no sig.
Some times just a very slight nuge of the B VFO in the HF direction is
sufficent to restore sigs, but bring the B VFO down again and sub RX becomes
deaf with a lot of noise again.
When you tune across this edge 7025 or 7035 you can turn "ON" and "OFF" this
sub RX noise.
I have seen this very same effect at both M6T and when elsewhere on
different SN radios.
I can hear the shouts of B/Set already and antenna switching, but it's not
this as in all ocasions we either had an ext antenna or loop back with
filters etc. connected.
I know this radio is getting on a bit old but it's got a few years left
surley, hence any help re this would be much appreciated.
Could this be a calibration issue?
I doubt it as it is defetnaly related to the VFO(A) QSY issue.
Any sugestions from the expert here much appreciated, apart from buy a new
radio that is...!
73 Tony G2NF
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