[Elecraft] K3 - NO SSB RX

[Terry Posey]

I think you are not alone, Bruce.  I have experienced a similar SSB RX audio
loss on several occasions. And there seems to be no recovery other than a
RESTORE CONFIGURATION.  

In my case, I keep my K3 M1 memory loaded with VFO A 50.110 USB and VFO B
50.125 USB, and M2 memory loaded with VFO A 50.100 CW ALT and VFO B 50.110.5
CW ALT. My loss of SSB RX audio seems to occur if I am working CW with the
K3, then press the M1 memory and hurry-press the A/B button before the M1
memory change sequence is completed (the K3's frequency and mode changes
from memory is not instantaneous).  After the K3 settles down, the USB RX
audio is completely dead, but the CW, DATA, AM, FM modes audio still work.
I have also cycled through the bands, and the USB RX audio is dead on each
band.  The USB TX audio seems to work; however, I have not tested for that
extensively.  I have found no way to restore the USB RX audio other than to
RESTORE CONFIGURATION.  This problem would be most inconvenient if it occurs
during a contest or a DXpedition.  Do not leave home without your K3
Utility.

Something for Wayne to ponder over the weekend.

73, Terry K4RX

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Bruce Meier
Sent: Saturday, July 17, 2010 8:04 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] K3 - NO SSB RX


Now that this problem has occurred twice it is time to ask if I am alone.

One of my K3s lost all audio on SSB RX.  It still worked fine on CW.  TX was
fine on both modes.  However, if I increased the Width beyond 3.0kc SSB RX
audio came back.  When the Width was decreased below 3.0kc the audio was
again gone.  The problem was not band specific - it occurred on all bands.
This happened last week during the IARU and again about 10 minutes ago.
Last week it occurred while the K3 was powered up and being used.   This
week, when I it was powered on, it came up in this condition.

The fix appears to be a RESET.  (Push NORM - power up - EE INIT) Then I run
the RESTORE CONFIGURATION from the K3 utility program.    The K3 is then
back to normal. 

My concern here is two fold.  1. This should not be happening. 2. This issue
could be the beginning of a larger issue that won't be fixable with a RESET.

Has anyone else had this issue?

K3 # 1193
Firmware: 3.97
Filters: 2.7kc, 400hz, 250hz


73,
Bruce - N1LN