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

[Sam Morgan]

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