Re: K3 Loses RX Audio at BW of 2.8 kHz
Posted by
Rick Prather on
Feb 06, 2010; 7:59am
URL: http://elecraft.85.s1.nabble.com/K3-in-a-cw-pileup-needs-work-tp4523884p4524520.html
I have been noticing a similar anomaly since 3.76.
The only difference is it happens when I go to 2.9.
As I increase the width I see the filter switch at 2.8 (I have the 2.7 SSB filter and 6.0 AM filter) and then at 2.9 it goes dead until I advance it to 3.0 and from then on it continues as it should.
Also when it goes from dead to audio at 3.0 I get a nasty click.
Scott, maybe it's a Prather deal.
Rick Prather
K6LE
On 2/5/2010, at 10:45 , Scott Prather wrote:
> All: This evening when running FW 3.76 I'm seeing a problem with my K3 that
> I've never seen before.
>
> When the K3 is in the LSB, USB or AM mode, adjusting the bandwidth down to
> 2.8 kHz will result in total loss of audio, even though the S-meter
> continues to read incoming signal strength. I've tried an EE-Init and
> reloaded the configuration, but the problem remains. Thinking this might be
> related to 3.76, I went back to 3.30 and I have exactly the same problem. If
> I turn on the sub receiver and change its BW using BSET, it loses LSB, USB
> and AM audio at 2.8 kHz as well. To get audio to return, all I need to do is
> change the BW to 2.9 kHz or greater on either the main or the sub.
>
> Looking through the reflector postings, it looks like someone saw something
> similar to this in the DATA mode a few months back, and pressing the A/B key
> would clear it. However, in my case the only way I can restore audio is to
> change the BW to 2.9 kHz or greater. In the CW and DATA modes, the audio
> does not drop out at any bandwidth setting.
>
> Does anyone have a suggestion as to what might be going on?
>
> Tnx.
>
> Scott
> N7NB
>
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