[Elecraft] K3 receiver noise questionable test results

[Steve Ellington]

The isolation between ANT 1 and 2 isn't very good on mine either. If an 80m 
cw signal is S7 to S9, I can still copy him just fine (s3) when switching to 
the other ANT which has nothing connected. It might be 30db or so but you 
would expect much more.
Steve
N4LQ
N4LQ at carolina.rr.com
----- Original Message ----- 
From: "K2MK" <k2mk at comcast.net>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Friday, December 18, 2009 8:39 AM
Subject: [Elecraft] K3 receiver noise questionable test results


> I've hesitated to write because I don't have another rig to compare to my 
> K3
> and because I use a vertical antenna which is by its nature noisy. I 
> always
> have a high background noise level on all bands. I have NEVER experienced
> what some have described as a dead quiet band with signals popping out.
>
> My K3 is a year old with the latest firmware and all of the hardware mods. 
> I
> have not yet upgraded to a Rev C DSP board. I have tried various settings
> for RF gain and AGC THR and SLP. I believe that I am proficient in making
> these adjustments.
>
> One test that I have performed leaves me scratching my head as to its
> results. Maybe someone can enlighten me. I tune to a medium strength CW
> signal and press my ANT button to switch between ANT 1 and ANT 2. I have
> nothing connected to ANT 2. The signal disappears but the background noise
> level remains the same.
>
> 73,
> Mike K2MK
>
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