LA1PHA: RE: [Fwd: [Elecraft] My K2/100 wan't regulate down power on 40/80]

[Tom Arntzen]

----- Original Message -----=20
From: "Gary Surrency" <support at elecraft.com>
To: <tom.arntzen at monet.no>
Cc: "'CSinfo'" <csinfo at elecraft.com>
Sent: Monday, November 01, 2004 5:42 PM
Subject: LA1PHA: RE: [Fwd: [Elecraft] My K2/100 wan't regulate down =
power on 40/80]


Hi Tom,

First see if all of your BFO settings are close to these:

CAL FIL BFO settings:



FL1 FL2 FL3 FL4

LSB 4913.74 4913.85 4913.37 4913.23

USB 4916.43 4916.35 4915.72 4915.58

CW N 4913.60 4913.08 4913.01 4912.96

CW R 4914.79 4914.48 4914.46 4914.34
All settings is pretty close to mine

Each rig will be a little different when best aligned. But the settings
should be close to these. The RF output should be the same when you =
whistle
in both USB/LSB mode as it is in TUNE or CW. Make small adjustments to =
the
FL1=3DOP1 CAL FIL BFO settings until the transmitted SSB sounds best =
when
monitored on another rig using headphones to listen to the K2's SSB TX
signal. See the bottom of page 22 of the KSB2 manual for more about =
this.
This is how I did it also.

Ground the mic jack as shown at to prevent RF pickup and feedback:
http://www.elecraft.com/Apps/k2_microphone_jack_grounding.htm
I have to looked into this , but my antenna is far away and grounded.
I get good audioreports from 40-10. Sounds good on second RX also.
80 meter is good up to abt. 20watts and still clear up to 100watts , but =
I can hear something is getting into the audio.

No mods is done to the ksb2

The fan running when you whistle seems like RF is getting into the =
KPA100
control circuits. Make sure all of the paint was removed from the =
chassis
panels where the 2D fasteners attach, and from where the KPA100 PA =
shield
grounding clips make contact. The 2 solder lugs should also be installed
between the corner screw of the KPA100 PA shield and the top outside =
corner
screw of the SO-239 antenna connector.
All done and checked.
Problem persist with kpa100 laying beside K2 also.
I also discovered that K2 current in display is abt.3amps directly after =
bandchange and wan't settle down before I speak and adjust down at same =
time.
Then when I adjust to max again power out has settled at 110watts and K2 =
current is below 2.amps.
CW workes smothly as it should.
On CW I can sett power to 30watts and switch between 40 and 80 and power =
will stay att 30watts.
Doing the same in SSB will cause the rig to give full blow out until I =
adjust down and then up again while talking.
On 40 and 80 something is not right.
Barefoot 15 watts has always sounded good. So also on 100 watts , just =
bearly hearable changes on 80 as power go to 100watts.
160 on dummy work good on all modes.
I just can't see what would make the problem on ssb and not cw as the =
power control act on same line?
Any thoughts?
I kinda get a little on my edge when powermeter shows almost 200watts on =
a 100watt PA when transmitting into 1:1swr.
It then draws about 25 amps. ooops!

73 de Tom LA1PHA