[Elecraft] KX3 AM-breakthrough

[Bruce Beford]

Peter,

I have heard from some afflicted with this, that the situation can be helped
in a few ways. 

#1- reduce the overall system gain. Turn off unneeded preamps, turn on
attenuator.

#2. Often, the interfering signal has been identified as a SW BC station
_below_ the Amateur band in use. In these cases, a high pass filter may
help. The output LPF of the rig will not reduce the incoming, lower
frequency, interference. This would imply a switchable (or otherwise
tunable) HPF, provided by the user, and switched in as needed. Less than
ideal, but may be helpful in some situations.

#3. engage the 8KHz Rx shift.

Note that this does not affect all operators, in all situations. When it
does, however, it can be quite debilitating to RX. The 8 KHz shift does
seems to help in most cases, but should be used only when needed, as Wayne
has previously said.

73,
Bruce
N1RX

> This thread has moved way beyond my technical level.  As I understand, the
> problem arises in locations where there are very strong broadcast 
> stations, well outside the ham bands.  Presumably a bandpass filter 
> doesn't help -- is it that the mixing products are occurring in the 
> antenna?  Wouldn't the solution then be in the antenna, in the form of 
> directional nulls or stub filters?

>     Peter W0LLN