[Elecraft] [K3] Odd transmit power output behavior on TX DATA

[aa4lr at mac.com]

Well, I’ve half-way figured it out. 

I increased the LINE gain to the point where I can get 4-5 ALC bars, and now I get plenty of power right away.

Still trying to figure out why it takes so much gain, but I’ll puzzle that out given time.

Thanks everyone.

> On Dec 30, 2022, at 1:24 PM, David Hachadorian <k6ll.dave at gmail.com> wrote:
> 
> It could be a momentary high SWR when starting a transmission because of some slow switching somewhere in line. In K3 Config, try increasing the value of Tx Dly.  I have to set mine at 14 because of a slow amp.
> 
> Dave Hachadorian, K6LL
> Yuma, AZ
> 
> 
> On 12/30/2022 8:34 AM, Bill Coleman via Elecraft wrote:
>> I own two K3/100 radios. One is SN70xx, another SN87xx. On one of them, I observe an odd behavior with transmit power output.
>> 
>> Even though I have an antenna matched to nearly 1:1 VSWR using the internal tuner, any time I change bands, or adjust the power level, SN70XX does not put out full power right away. Instead, it starts about 40-50 watts, and then slowly creeps up to 100 watts. This takes about 4-6 15 second FT8 transmissions.
>> 
>> It doesn’t appear to behave this way on CW or SSB. Only on TX DATA modes.
>> 
>> My other radio doesn’t exhibit this behavior.
>> 
>> The two radios have different internal options, but many of the configuration parameters are the same.
>> 
>> Any suggestions?
>> 
>> Bill Coleman, AA4LR, PP-ASEL        Mail:aa4lr at mac.com
>> Quote: "We invented personal computing."
>>           -- Bill Gates @ TechNet / MSDN 2003
>> 
>> 
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