Wonderful summary - I like it! Great advice for first PA - almost makes me
want to start one myself! Hummm - I've got all those parts leftover from the
4-1000A rigs. Hummmm - still have the rack. Hummmm - vinyl overlay for the
panel would make it really nice looking. Hummmm - always wanted a glow jug
perking away. Nothing fancy - I have some small bottles around - a B&W tank
(since those are not selling for much, I saved the best one). Hummmmm. Just
what I need - another project! NOT! But still......
73
Bob Groh, WA2CKY
________________________________
From: Jim Thomson <Jim.thom@telus.net>
To: amps@contesting.com
Sent: Sat, January 30, 2010 9:24:03 AM
Subject: [Amps] Building an amp
carl is right
simple 813's.. and 4-400's in GG will work just fine.
One can always 'up- grade' to Chinese 3-500Z later on... [ or a
3CX-1200] That socket will handle 4-400A/B/C 3-400Z and 3-500Z
3CX-1200 etc.
Even a SINGLE 4-400A/B/C would be a good ticket. Then u don't have to
worry about tube balancing problems etc.
keep the voltage down, then no vac tune cap required. If u can find a vac
tune cap, great, use it.
They are easy to get going on the low bands... and with some minor tweaking,
upper bands too.
Anything from 2-4 kv will work. The builder can up grade any portion of
it.. at any time. .. like qsk, etc.
Sorta like a ... 'work in progress' / starter amp / building experience.
/ learning experience.. all at once.
My buddy did that with the green lee large meter punch's....... bought em on
ebay .. used em.. then resold em !
later....... Jim VE7RF
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