[Johnson] JOHNSON KW MATCHBOX

[radio]

I know a ham who did this and used the internal antenna relay to switch in 
the extra capacitance, added an line cord, and just plugged it in...or used 
an inline switch to operate 160.
Paul, W9PJ
----- Original Message ----- 
From: <w4pnt at highspeedlink.net>
To: <boatanchors at listserv.tempe.gov>; <boatanchors at mailman.qth.net>; 
<johnson at mailman.qth.net>
Sent: Tuesday, December 05, 2006 8:44 AM
Subject: [Johnson] JOHNSON KW MATCHBOX


> Morning AM'rs
>
> The modification to a Johnson KW matchbox for 160m.......
>
> Seems a long time ago someone @ Johnson factory did an addendum on this
> but it never got in print. This I found in a manual I got from a friend &
> he drew out by hand what he had seen & done to his matchbox.
>
> The modif consists of two large RF caps (I used mica) of 400pf @ 3kv, 5 rf
> amps, one on one side if C-1 to ground & the other on other side to
> ground, switched in by a quality, beefy relay while on 80m position.
>
> Thats a all there is to it. I can tune 160m no problem just as if I were
> on any other band. Of coarse, I switched the relay via outboard switching
> so as not to drill a hole the nice panel.
>
> Hope this helps some of you.......
>
> Warm regards
> Dee
>
>
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>