[Elecraft] K2-100 Parasitic

[Vic K2VCO]

I remember this problem from the early days of the KPA100, although not 
necessarily in connection with the KAT100.  I believe there was a 
builder's alert issued about the RF choke location, but I was unable to 
find it on the Elecraft Web site.

If the KPA100 is old enough that it does not have the side grounding 
clips and reconfigured shield, there is a modification kit at 
<http://www.elecraft.com/order_form_parts.htm> called KPA100SHLDKT. 
This change was included in KPA100's shipped after June 2003, according 
to the parts list description.  The reconfigured shield has a smaller 
gap near the SO239 and the RF choke which I believe was intended to fix 
this problem.

Although I don't recall exactly, I think the suggestion in the original 
Builder's Alert was to mount the RF choke away from the hole in the 
shield and as close to the chassis as possible.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco