[Elecraft] [K3] K3 3.04 Power Output After Tune

[Bill Coleman]

Augie Hansen wrote:
> Dave G4AON wrote:
>   
>> I assume by "after I tune" you mean pressing the XMIT/TUNE button to
>> create a CW carrier at some level between 20 Watts and 100 Watts. I've
>> tried various combinations of power and both the actual measured output
>> and the indicated output on the K3 are both fine. No problem here at all.
>>     
>
> My K3 has a KAT3 installed. When operating split on 40 meters it is 
> necessary to tune one of my TX antennas. Following the successful tune 
> operation (1:1 match) an attempt to call results in very low (<2 watts) 
> output power. Neither talking nor whistling causes the power to return 
> to 100 watts. I have to swap VFOs, switch to CW and key the rig to get 
> the power back to the requested value. Then, of course, return to LSB 
> mode, swap VFOs back so that I'm transmitting on the correct frequency.
>
> Based on Jim's description I believe he is having the same problem.
>
> Gus Hansen
> KB0YH
>
>
>   
I see a power cutback after KAT3 tune also - not as dramatic as Gus 
describes.    Not using SPLIT. 

Using the 2TONE test signal on SSB yields ~100W, tune the KAT3 and 2TONE 
test again yields ~65W.  Change to CW, tap the key, back to SSB and I 
get ~100W.   All this into a dummy load & on any band.

Other observations:
If you tune the KAT3 then bypass the KAT3 it still only outputs ~65W.  I 
also tried various settings of TUN PWR (10, 2, & NOR), all acted the same.

Works OK on FW2.82,  'fails' on FW3.03 and FW3.04

73, Bill  N2BC