[Elecraft] K2/100 and ACOM-1000

[Mike Harris]

Hi Stefaan,

Same here.  It is a problem with overshoot of the requested output on SSB. 
CW is perfectly OK.  Not much you can do about it.  I've tried the mod to 
make the AGC more aggressive on the SSB board without much real effect. 
The problem is worse on 40M and progressively decreases as you go up in 
frequency and the overall TX gain drops.

The only solution I have is to turn the drive power way down on the very 
odd occasion I use SSB on 40M, mainly because I don't like to see the amp 
being thrashed.

I guess the overall problem is that the K2 was never really designed to 
cope with +25dB gain on top of the base QRP setup.  We are just pushing 
the thing too far.

Having said that, there must be a raft of items on the K2 wish list that 
could be addressed when the K3 frenzy dies down.  A revised SSB board 
possibly and some firmware upgrades.

Regards,

Mike VP8NO

| I just got an ACOM-1000 that i am using with my K2.
| When I am drivng it with 13...14W for approximately 300W output, I 
noticed
| that I got a power output reading in excess of 1kW during the start of 
my
| SSB transmission, just for a second or less. CW seems to be ok.
| Does anyone else noticed this? What can be done about it?
| I heard that some FT1000 had a transient, putting 200W into the 
amplifier at
| the start of the transmission, and the PA did not survive this.
| I do not want this to happen with my PA.
|
| 73
| Stefaan ON4FG / OP4T / TZ4T