[Elecraft] KX3 BC Breakthrough

[Walter Underwood]

If the interference is from a single station, you can use a "wave trap". This is a series-tuned resonant circuit across the transmission line that "shorts out" that frequency.

Here is a good article about building one to get rid of a MW broadcast station.

http://www.w4btx.com/wave.html

wunder
K6WRU

On Aug 15, 2013, at 1:36 PM, Ron D'Eau Claire wrote:

> If turning the Preamp off fixes the problem, that would be my first choice
> as long as I can hear the noise level drop when I disconnect the antenna. 
> 
> If removing the antenna doesn't cause the noise level to drop, then the
> preamp is likely useful for hearing weaker signals. In a QSO I'd still turn
> the preamp off to see if it affects my ability to hear the other station. 
> 
> Putting too much gain at the antenna input compromises the performance of
> any receiver 
> 
> 73 Ron AC7AC
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Igor Sokolov
> Sent: Thursday, August 15, 2013 1:19 PM
> To: Paul Barlow; elecraft at mailman.qth.net
> Subject: Re: [Elecraft] KX3 BC Breakthrough
> 
> Paul,
> I have this direct AM detection on my KX3 every day mainly on 20-15-10 m
> bands/ I would not call it a problem because shifting IF 8 kHz solves it
> 100%. Although this disables dual RX but one seldom (if ever) needs it on
> this portable  QRP transceiver.
> Yet the radio is the best available choice for traveling and it has got very
> good receiver.
> 
> 73, Igor UA9CDC