[Elecraft] K3 : Unstable output power in DATA A mode

[Keith Onishi]

Don, San,

Many thanks for your detailed advices.
I have set up as you advised. Output in DATA A mode became stable with occasional glitch.
I think I need to find the best setting for my system.

Thanks again for your excellent advices.

73 de JH3SIF, Keith

2014/01/31 6:27、Sam Morgan <k5oai.sam at gmail.com> のメール：

> then using the K3 in DATA A mode
> this often is caused by incorrect audio levels
> 
> the k3's audio level should show 4 bars with the 5th bar flickering
> I have run my K3 with the 5th bar solid and it still worked ok
> 
> the power out level is set by the K3's PWR knob
> 
> most other rigs have a different way of setting this up
> doing it 'their way' on a K3 results with the varying power levels you are seeing
> 
> On 1/30/2014 2:37 PM, Keith Onishi wrote:
>> Output power of my K3/100, SN 79xx, without KAT3 is very unstable in DATA A mode. The symptom is;
>> 
>> 1. With setting 100W output on 14MHz and 10MHz, I get 100W output for a couple of seconds, then suddenly the output goes down to 10W or so.
>> 2. On 7MHz and below, the output power never go up to 100W with setting 100W output.
>> 3. With setting around 20W output, actual output sometimes stay around 10W. Upon holding TUNE button a couple of seconds, the output goes up to desired level.
>> 
>> I guessed this might be caused by RF interfere. However, checking with dummy road gave the same results.
>> 
>> These happen only in DATA A mode (I have not tried in AFSK A mode).
>> I got stable 100W and a little up in FSK D and PSK D as well as CW. (I have not tried SSB yet.)
>> 
>> I manually made Transmitter Gain calibration without error since K3Utility calibration capability does not work with K3 with 60m disabled for Japan use.
>> 
>> Any thought on this problem?
>> 
>> 73 de JH3SIF, Keith
> 
> -- 
> GB & 73
> K5OAI
> Sam Morgan