[Elecraft] Rx comparison test with the K2

Sun Jun 2 22:54:00 2002

Hi, Ron...

(Delayed reaction reply)

I carried the K2 out to my noisy car this evening and tried the NB.  You're
absolutely right... it does a very credible job on my ignition noise.  With
K2 preamp on, the ignition noise is +/-S8.  With the blanker, maybe S2.  I
found only a couple of very marginal signals (engine off) that I couldn't
copy with the engine on and blanker engaged.  I couldn't get to the cord but
suspect if I could have plugged in my ClearSpeech DSP, the rest of the noise
would have vanished.

It's really too bad it won't ALSO help with QRN and man-made hash.  Maybe we
need a two-section blanker like some of the rice boxes have.

Whew... does this mean I must build another K-2/100 to use in the car?

73... Ed, W5EJ
----- Original Message -----
From: "Ron D'Eau Claire" <[email protected]>
To: <[email protected]>
Sent: Monday, May 27, 2002 11:17 AM
Subject: Re: [Elecraft] Rx comparison test with the K2

> >  Frankly, I haven't been very impressed by
> > the K2's blanker either, but not sure I've had a chance to test it under
> > really noisy conditions.  When thunderbumpers were hovering 50 miles
away,
> > I've seen QRN levels 20db over S-9.  The FT-1000D's blanker would
usually
> > reduce it to S2 or 3.
> > Ed, W5EJ
>
> Quite right!
>
> The K2's noise blanker is designed to handle high-amplitude impulse noise
> such as auto ignition - pulses with a very fast rise-time. It doesn't do a
> thing to help with typical "atmospheric" QRN.
>
> Ron AC7AC
> K2 # 1289
>
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