[ETO_Alpha] Alpha 78 on 17m and 12m?

Thu, 11 Jul 2002 11:07:03 -0400

Hi Duane
    The Alpha 78 works fine on 17, but not on 12 meters - the plate choke is
resonant there, and the broad band 10 meter plate tank circuit does not go
low enough.  It is a very difficult modification to get it on 12.
    By the way, does work on 30.
For more information try Dick Byrd, N4UQ.  Home page is:
http://pweb.jps.net/~n4uq/index.htm.  Someone did a very expensive one time
mod to get the 78 on 12.  Lots of time and an RFParts RFC plate choke.
    I can find that somewhere if you want to spend lots of time and energy
and some money.
    73        George        K8GG

----- Original Message -----
From: "Duane C." <[email protected]>
To: <[email protected]>
Sent: Thursday, July 11, 2002 10:32 AM
Subject: [ETO_Alpha] Alpha 78 on 17m and 12m?


> A club to which I belong has an Alpha 78 amp.  I have not operated the
station in a long time, and have never operated the amp.  However, a
question has arisen from a new member regarding whether the amp will or can
be made to work on 17m and 12m.   Does anyone know the answer to this?
>
>      73, Duane
>
> Duane Calvin, AC5AA
>
> Austin, Texas
>
>
>
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