[Elecraft] K3 3.30 FW 80M split-strange behavior

[Ted Roycraft]

Joe,

If this helps isolate the problem ... I tried your scenario (and others) 
and I can't reproduce the problem. 

My configuration:
    -Sub receiver (but turned off)
    -Firmware:    uC: 3.44
                         d1: 2.38
                         d2: 2.38
                         fl: 1.04

73, Ted, W2ZK

Joe Planisky wrote:
> Confirmed, but with a few differences.  In my case, I found:
>
> 1. I don't have to actually be in SPLIT mode.
>
> 2. It doesn't seem to depend on the VFO-B frequency.
>
> 3. VOX on/off doesn't seem to matter, manually entering transmit with  
> the XMIT button seems to be the trigger.
>
> 4. It's frequency dependent.
>
> That is, if I tune VFO-A to 3.535 and tap the XMIT button to enter  
> transmit and then tap it again to enter receive, the receiver is  
> dead.  (By "dead", I mean I hear noise but at a very reduced level.)   
> If I tap my paddle, the receiver comes back immediately.  If I do the  
> same thing at 3.530 or 3.540, it doesn't happen (i.e. the receiver  
> always comes back fine.)
>
> Interestingly, I DON'T see this behavior at 3.515.
>
> 73
> --
> Joe KB8AP
>
> On Oct 19, 2009, at 5:03 AM, Mark C. Killmon wrote:
>
>   
>> Hello,
>>
>>
>>
>> Can anyone reproduce this one, or is it just me?
>>
>>
>>
>> 80M, A VFO on 3.515, no sub receiver (I don't have one), B VFO on  
>> 3.518.5.
>> Key the transmitter (PTT via a footswitch or front panel XMIT) and the
>> receiver comes back with vy. low sensitivity. Key it again, receiver  
>> is
>> fine. This effect is totally repeatable, toggling back and forth. No  
>> split,
>> no problem, so it's not the RF path and/or antenna.  If I use the  
>> XIT to
>> accomplish the split, I have the same problem.
>>
>>
>>
>> Here's the real kicker. When the split is less than 3 kHz or greater  
>> than 5
>> kHz, the K3 doesn't  behave this way.
>>
>>
>>
>> If I use VOX, no problem. The same configuration on 40M doesn't  
>> produce this
>> problem.
>>
>>
>>
>> This might be a "If it hurts when you move your arm like this, don't  
>> move
>> your arm like this" situation, but I generally use PTT via a  
>> footswitch and
>> this split is not unusual. I'll run VOX to get around it for now.
>>
>>
>>
>> V. 3.30 FW, 2.26 DSP
>>
>>
>>
>> 73, Mark
>>
>> K3  #2861
>>
>> www.k4so.com
>>
>> www.picasaweb.com/kfourso
>>
>> kfourso.googlepages.com
>>
>>
>>
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>
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