[Elecraft] K3 Power Output

[hb9ari]

Hi Trev,

Since the beginning, i always get the same behavior
with my K3 #1212 (factory build). I work
essentially with JT65A mode; as this mode
is a single tone mode, i've set the modulation
level just before full ALC and power to 50W
(for DX only...). At the beginning of a
JT65A transmit sequence, the power start
at ~ 25W and go up to ~ 48W in 3 to 5 sec.
If  the PA temperature is at ~ 40 to 46°C,
the power variation is lower and power
output start at ~40W; i'm certainly
wrong, but i've always thought that this
was related to PA temp and, as i never get
an output power higher then selected,
this was not a problem in my case.

What is a problem for me is the transmit
audio response; i've tried to adjust XTAL filter
without success; TX EQU compensation
too. As my VFO working frequency
is always set to the JT65A "preferred"
frequency, it's the audio frequency who
defines the actual output spectrum;
for some audio values, i get well over 3dB
output power variations between some
JT65A instantaneous frequencies;  for example,
with a 45W max power, for somes frequencies,
level go under 20W;  i work  with this since more
then one year and i'm always hoping that
the AGC of my correspondent can handle
a "little" ~3dB RF input variation (the QSB
is generally higher...)

Sorry for this time and bandwidth consuming
message.

73 QRO de Rudolf, hb9ari

trev wrote:
> It's been a long time since I made a post to this group so hope someone can
> help.
> My K3/100 which has all the latest firmware installed behaves oddly. When
> the TX is keyed with
> the mic the power out only goes to approx 30watts although it is set to
> 100watts. Then it seems
> to slowly build when the mic is keyed a few times. Maybe I am missing
> something or have a parameter set wrong in a menu. 
> I would appreciate any thoughts or ideas. Thanks in advance.
> Trev GW4IMC 
>