[Elecraft] K3 Question

[Vic K2VCO]

Julian G4ILO wrote:
> I'd order the second receiver in an instant if that option became a reality.

On 8/24/07, Brett gazdzinski <brett.gazdzinski at verizonbusiness.com> wrote:
 > > Maybe even a noise nuller type setup where you have a noise antenna
 > > that picks up local noise and eliminates it.

If you order KXV-3 transverter interface with the K3, you get antenna 
in/out jacks. This is very handy for connecting such things as bandpass 
filters or noise cancellers. It allows you to insert something in the 
receiver antenna path.

I have an MFJ noise canceller which is designed to work with a 
transceiver. It has a slow, clunky bypass relay which takes it out of 
the circuit when you transmit. Unfortunately, this relay only works (and 
poorly, at that) with semi-QSK. I stopped bothering with it as a result.

However, with the MFJ connected between the antenna in/out jacks, the K3 
takes care of the t/r switching.

The MFJ seems to work well with just its little whip for a noise antenna 
(it has a connector for a bigger antenna if you wish). Although it does 
not help with stuff like distant thunderstorms, it is effective for 
locally generated noises, like ethernet birdies, plasma TV noise, 
aquarium thermostats, power line noise, etc.

You need to diddle with the controls to null a noise. It doesn't always 
work, but sometimes it is a lifesaver.
-- 
73,
Vic, K2VCO
Fresno CA
K3 ("James") s/n 0007
http://www.qsl.net/k2vco