[Elecraft] KPA100 40M Parasitic Circumvention

[Tom Hammond]

Several folks have written, asking for the docs on eliminating the 
40M parasitic in their KPA100.

First - This problem is NOT present in all KPA100s (as least as far 
as I can tell), however, it is present in some of the amps.

It will generally present itself as an instantaneous HI SWR 
indication, with an instantaneous reset of the K2 at the same time.

SO far, the circumvention has been to move RFC10 (the RFC back at the 
SO-239 in the KPA100) further inward.

A further description of (part of) the problem and the circumvention 
is now available at:

    http://www.n0ss.net/kpa100_40m_parasitic_circumvention.pdf

I hope this helps some users.

We now have some successful 'experience' reports from other users, 
about a dozen to date) which indicates that this small change seems 
to be effective.

73,

Tom Hammond    N0SS