[Elecraft] K3 MCU 4.17 (APF beta) kills SSB output?

Wayne Burdick n6kr at elecraft.com
Thu Nov 4 19:43:01 EDT 2010


Please retry TX gain calibration on affected bands. This is the usual  
cure for a difference between CW and SSB power output.

Wayne
N6KR

----
http://www.elecraft.com

On Nov 4, 2010, at 4:30 PM, Nate Bargmann <n0nb at n0nb.us> wrote:

> * On 2010 04 Nov 18:23 -0500, Dave, W8OV wrote:
>> I had no loss of SSB power output after the 4.17 Beta install.  The  
>> APF
>> works wonderfully, with only a hint of ringing to my ears.  Really  
>> nice
>> addition to the K3.
>
> At least some of you aren't seeing this.  :-)
>
> James Rogers suggested turning the Mic gain to 0 and then back up  
> and he
> was getting good output.  After I did that, I could only get about 25
> Watts peak on both meters.  I switched to CW mode, transmitted a short
> carrier which showed 100 Watts on both meters (power control set to
> 100).  Switching back to SSB both meters showed about 70 Watts.  I  
> have
> since bumped TXG VCE up to the max, 3.0 dB and am getting about 90  
> Watts
> peak on each meter (I say fourrrrr in a normal voice to get the K3's
> meter to stabilize for a bit).  I had previously had TXG VCE set to  
> 1.0
> dB.
>
> I'm not sure that rolling back to the last stable firmware would solve
> this or be fraught with other issues.  Generally, roll-backs don't  
> work
> all that well in other devices.
>
> 73, de Nate >>
>
> -- 
>
> "The optimist proclaims that we live in the best of all
> possible worlds.  The pessimist fears this is true."
>
> Ham radio, Linux, bikes, and more: http://n0nb.us/index.html
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