Hi Pete,
I've heard a few different reasons and stories. I know about the
parasitic
reason as Rich mentions. The larger load cap SB-220 was built in 1970
and the smaller spaced cap came from a later >1970 built kit. This
would not jive with the information as I now understand it. The larger
tune
cap amp also has some differences in the chassis holes provided to
route the rf. There is a special larger hole under the cap to route the
rf
out to the relay via a ~1/2" strap. The smaller load cap amp takes the
rf
out through the band switch hole.
skipp
:From: Pete Smith <n4zr@contesting.com>
>Comparing this capacitor to another 70's vintage SB-220 loading
>cap shows the latter has a larger plate spacing. Can one of
>you trivia people tell me the reason for the factory change..?
:Loading cap? I heard they changed the tuning cap in the latter part of
the
:production run to one with wider spacing, but had heard nil about the
load
:side.
:73, Pete Smith N4ZR
:n4zr@contesting.com
________________________________________________________________
YOU'RE PAYING TOO MUCH FOR THE INTERNET!
Juno now offers FREE Internet Access!
Try it today - there's no risk! For your FREE software, visit:
http://dl.www.juno.com/get/tagj.
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|