K3 Receive Sensitivity Consistency

[KD4NUE]

When I turned the K3 on this morning, I decided to listen to 60m, to get
away from the contesting.
 
As I went through the bands from the 2 meg frequency I had been monitoring,
when it got to the 5 MHz band it seemed to be a bit deaf.  
 
Volume was considerably lower, but signal on the P3 looked consistent with
the other bands.  
 
Going into the Menu and bringing the Receive EQ to +16 on all 8 frequencies
did not restore the volume level.
 
Using the Band switch, toggling back down to 75m brought similar results;
lower receive level.
 
However when going back to the original 2 Meg frequency and manually tuning
up with the VFO, the sensitivity and volume remained consistent all the way
up to the 5 Meg freq that I was trying to monitor initially.
 
After that, going through the spectrum using the Band Select switch yielded
consistent results.
 
When using the VFO, I was looking for a magic relay click, or some crossed
frequency threshold that triggered a return to sensitivity, but there was no
degradation as long as I was going up the band with the VFO.
 
Serial Number 5063; Anyone else seen this before?
 
David
KD4NUE
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David,

Check your PRE and ATT setting on 60m compared to your other bands. I
would guess that you have the ATT engaged on 60m and not on the other bands.

73, Dale
WA8SRA


On 10/28/2012 12:22 PM, David Little wrote:

> When I turned the K3 on this morning, I decided to listen to 60m, to get
> away from the contesting.
>  
> As I went through the bands from the 2 meg frequency I had been monitoring,
> when it got to the 5 MHz band it seemed to be a bit deaf.
>  
> Volume was considerably lower, but signal on the P3 looked consistent with
> the other bands.
>  
> Going into the Menu and bringing the Receive EQ to +16 on all 8 frequencies
> did not restore the volume level.
>  
> Using the Band switch, toggling back down to 75m brought similar results;
> lower receive level.
>  
> However when going back to the original 2 Meg frequency and manually tuning
> up with the VFO, the sensitivity and volume remained consistent all the way
> up to the 5 Meg freq that I was trying to monitor initially.
>  
> After that, going through the spectrum using the Band Select switch yielded
> consistent results.
>  
> When using the VFO, I was looking for a magic relay click, or some crossed
> frequency threshold that triggered a return to sensitivity, but there was no
> degradation as long as I was going up the band with the VFO.
>  
> Serial Number 5063; Anyone else seen this before?
>  
> David
> KD4NUE
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[KD4NUE]

Preamp, Attenuator, ATU, AGC were all checked before determining that the
audio on 60m was lacking.

The levels on the P3 were also checked to aid in determining the problem.  

RX EQ was all maxed out in able to overcome the inherit audio attenuation
when the EQ settings are moved off of +16.

My guess is that it seems to be firmware related, and for now, the problem
has been cleared out of the processors scratch pad memory, and may not show
up again.........

Thanks,

David
KD4NUE


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Dale Boresz
Sent: Sunday, October 28, 2012 2:11 PM
To: [hidden email]
Subject: Re: [Elecraft] K3 Receive Sensitivity Consistency


David,

Check your PRE and ATT setting on 60m compared to your other bands. I
would guess that you have the ATT engaged on 60m and not on the other bands.

73, Dale
WA8SRA



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