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

[Randy Downs]

I can turn up the power control and it will increase to where it should be, 
even though the power control is allready set to 120w. After a turn or two 
the power goes back to approx. 100w. I can tap tune again and it will drop 
to approx 30 w peak on ssb. Talk and turn the power adjust up, even though 
it says 120w brings the power back up. It's then OK until I tap tune again!
Randy
K8RDD
----- Original Message ----- 
From: "Nick Lekic" <ve3ey at rogers.com>
To: "Bill Coleman" <n2bc at stny.rr.com>
Cc: "K3support" <k3support at elecraft.com>; <elecraft at mailman.qth.net>
Sent: Saturday, March 28, 2009 10:19 AM
Subject: Re: [Elecraft] [K3] K3 3.04 Power Output After Tune


> Same problem here Bill
>
> Low power output (40watts - 60watts) after using the tuner.  CW produces
> full output.
>
> 73,  Nick
> ve3ey
>
>
> On 3/28/2009 10:03 AM, Bill Coleman wrote:
>> 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
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