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

[aa4lr at mac.com]

I figured out why it takes so much gain. Somewhere along the line, I switched sounds cards and I was outputting to the wrong channel. Amazing that I was able to get any transmit at all.

> On Jan 3, 2023, at 9:55 PM, Bill Coleman via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> 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
>>> 
>>> 
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home:http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help:http://mailman.qth.net/mmfaq.htm
>>> Post:mailto:Elecraft at mailman.qth.net
>>> 
>>> This list hosted by:http://www.qsl.net
>>> Please help support this email list:http://www.qsl.net/donate.html
>>> Message delivered tok6ll.dave at gmail.com  
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to aa4lr at arrl.net
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to aa4lr at mac.com

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
          -- Wilbur Wright, 1901



Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at mac.com
Quote: "Boot, you transistorized tormentor! Boot!"
           -- Archibald Asparagus, VeggieTales