The upgrade improves the overall stability of the design. Most KPA100s are
FB as is, but variations in how some KPA100s were built (particularly the
exact position of RFC10 at the antenna connector at the output) and
apparently some situations where normal parts tolerances added up all in one
"direction" caused a few amplifiers to exhibit instability on one or more
bands under various conditions.
It's a straightforward and easy upgrade to do. If you have any question at
all about your KPA100's performance, I recommend doing it.
It's good that you have the shield upgrade installed. That is important to
do as well.
Ron AC7AC
-----Original Message-----
From:
[hidden email]
[mailto:
[hidden email]] On Behalf Of John Tindle
Sent: Monday, January 01, 2007 5:14 AM
To:
[hidden email]
Subject: [Elecraft] Upgrade for KPA100
I have been hors de combat for a year or two, notice that there is now an
upgrade kit for KPA100, I have early KPA100 but have upgraded shield and I
think put a resistor across an rfc. Have a feeling that there is some
instability on 80 metres? What is the upgrade kit supposed to remedy or
correct please?? 73 John GW3JXN
_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help:
http://mailman.qth.net/subscribers.htmElecraft web page:
http://www.elecraft.com_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help:
http://mailman.qth.net/subscribers.htmElecraft web page:
http://www.elecraft.com
Locked
