[Elecraft] KX-1 BC interference on 20m

[Stephen Prior]

Hi Geoff

Well, I left out perhaps the most important info in that I don't have the
problem on the same antenna with either the K2 or K3.  I have mentioned the
knock that the KX-1 received.  I have subsequently found that the knock has
broken the soldered joints holding both earth pins of the bnc socket-
looking at them I'm pretty sure they were dry joints anyway.  Having
resoldered them, most of the BC qrm has gone, but not all.  I have the same
effect both here in the UK and in Portugal and France, so it's not a nearby
fence in this case :-))

I'm sure that I did not experience the problem when I first had the radio
and I am wondering if there are further joints which have been disturbed- my
son caught the coax with his legs as he walked past my tent and the radio
flew off the table really very quickly!  I was pleased to find that it still
worked.

73 Stephen G4SJP


On 25/08/2008 19:21, "Geoffrey Mackenzie-Kennedy" <gm4esd at btinternet.com>
wrote:

> My thought is that the problem was caused by one or more of the natural
> spurious responses of the KX-1's receiver, not by some harmonic or spur
> generated by the BC transmitters themselves. BC transmitter harmonics might
> also be generated and heard if you had a "rusty bolt" problem caused by say
> a nearby fence, and the BC signals were strong enough.
> 
> 73,
> Geoff
> GM4ESD
> 
> 
> Stephen Prior wrote on Monday, August 25, 2008 at 2:07 PM
> 
>> As I have mentioned before, I really enjoyed using the KX-1 on holiday in
>> Europe this year but found that there were several broadcast stations
>> appearing across 20m from about 14.20MHz upwards.  I was using a roughly
>> 5/8
>> wave vertical antenna with counterpoise and the internal ATU.
>> 
>> Is this normal operation, or should I delve into the manual for alignment
>> procedures? I am at a disadvantage in that I did not build the unit.  The
>> radio suffered a pretty bad knock whilst camping and I am wondering if
>> something is adrift.
> 
> 
>