[Amps] Last question on Amp Supply LK-500 no tune

[Jim Thomson]

Date: Sun, 18 Feb 2018 09:19:58 -0500
From: Ham H <kghams at gmail.com>
To: amps at contesting.com
Subject: [Amps] Last question on Amp Supply LK-500 no tune

<I now have the amp working perfectly with one exception. 160 meters has no
output. When I looked at the schematic they had a fixed loading capacitor
for 160 that says it was factory selected.

Well the pin on the bandswitch where that cap would go has no connection.
All bandswitch wiring is origianal and still has green paint on all
connections and the pin where this cap should go has never had solder.
Looks like it was never installed in the factory.

Does anyone have any idea what ball park value that cap is?  I know other
bands have air var caps that go to 500 pF .

Thanks

Gary K4MT

##  They depict a  1400 pf  at  5 kv  FIXED loading cap for  160m   on their parts
list on page 43... called  C69.    That same value cap is used on all 3 x versions of their
no tune amp.  They dont depict any variable cap in parallel with C69..... like is  done
on all other bands. 

##  Typ  the load cap on any 160 amp tunes very broad.  But still,  what part of the band do
you want to use it on ?     Even on a run of the mill 160m ant,   you also have to contend with some swr
vs a dummy load. 

Jim  VE7RF