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List:       elecraft
Subject:    Re: [Elecraft] AGC behaviour
From:       "Enno, PF5X" <cw () dx ! nl>
Date:       2008-09-30 21:26:00
Message-ID: 1222809960369-1130062.post () n2 ! nabble ! com
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John asked me to post this additional useful info.

-- Enno

=============

I wanted to report back to you on the "noise" I was encountering with my K3. 
I was not aware of this but changing the RX EQ settings other than default
will cause excess "noise" when changing to the cw mode. When I cleared those
previous settings the "noise floor" of the receiver went down. Something you
may want to try at your end.

73
john-n4dsp




Enno, PF5X wrote:
> 
> Hi all,
> 
> My K3 #1263 was delivered in July with F/W MCU 2.18 DSP 1.84 and I was
> really enjoying the RX capabilities of the K3. Now that I have upgraded to
> 2.38/1.90 I believe the RX is more "restless" when listening to an "empty"
> space on the band. The S-meter is constantly on S5 with pre-amp ON and S3
> with pre-amp OFF on the lower bands (30/40m). I have compensated that a
> bit by lowering the AGC threshold (from 5 to 4 now).
> I liked the initial F/W wrt AGC behavior better (less fatiguing to listen
> to).
> 
> I have read in the F/W history file that changes to the AGC have been made
> from F/W 2.22 onwards. So I wonder if other people have the same
> experience.
> 
> I live in an urban area so it IS noisy out here. It is just the way the K3
> deals with that noisy background level.
> When switching to ANT2 (not connected to anything) the RX goes virtually
> silent.
> 
> -- Enno, PF5X
> 

-- 
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