[Elecraft] Birdy on 28020 with K2?

[Vic Rosenthal]

Tom Hammond wrote:

> For what it may be worth, if you have an older KPA100 (not sure what 
> 'vintage' actually qualified it as 'older' though, mine's as old as the 
> come... an FT unit from before they hit the streets), but there is a mod 
> (available from me, and I think somewhere on the Elecraft web site) to 
> help eliminate, or at lease significantly reduce spurs from the KPA100 
> HV oscillator. Once a couple components. I have the illustrations for 
> the mod, but NOT spare parts.

Hi Tom (and others),

I also have this birdie.  Mine is especially strong on 18.068 or so.  I drove 
Jack Brindle nuts by claiming it was generated by the KRC2...actually, it is 
being RADIATED by the serial cable which in my case goes to the KRC2 and my 
computer.  But it definitely goes away when I turn off the KPA100.

I have installed the recent Elecraft KPA100 mod that delays the SWR power 
rollback to 2:1, and also includes a new 18.432 MHz crystal to replace the 16 
MHz one.  I thought this was done to reduce birdies, but apparently it doesn't 
reduce these.

Tom, I would be interested in your mod to reduce KPA birdies.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco