>
>A reply to all who gave me the input on their upgrades, excellent
>information. I
>found
>the modification going to the 3CX800A7 tube fairly easy. Did have a
>problem coming
>up with chimneys for the new tubes.
>
>The amplifier works excellent, and does not require much drive to make
>1500 pep
>output. The unit is quiet and very stable.
>
>Thanks for all the information. The Alpha is a very fine amplifier, watch
>the grid
>current,
>load a bit heavy and really powerful.
>
Alpha uses no speedup circuit for the vacuum-relay. To avoid
hotswitching with modern radios, a speedup circuit is needed. See Fig.
7B on my Web site. The Alpha bias system switches to non-linear bias
during soft syllables. The electronic bias switch in Fig. 7B does not
have this problem.
later, Ed
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|