[ETO_Alpha] 12 meter modifications

[eto_alpha@mailman.qth.net]

HI Tom,
I have two 76PA's and would love to get the info to allow 12M operation (and 
keep 160M also).   IF convenient, would you please send along the info.
Thanks and 73

Joe


In a message dated 1/29/2002 9:36:20 PM, n0ss@earthlink.net writes:

<< Hi George:

This is Tom, Dewey's friend in MO.

>Does anyone have a reasonable12 meter modification for an alpha 76P/C or 78?
>It would seem that an RF Plate Choke change could get the resonance off 24
>Mhz.  Has anyone tried that or gone another route without going to Alpha for
>$400++?

RF Parts sells a replacement RF choke which DOES allow operation at full 
power on 12M.

I even have prepared a complete set of installation documentation which 
I'll send to you if you decide to go that way.

NOTE that, with the new choke, you will NOT be able to use the amp on 30M, 
where we're limited to 200W anyway). I tried using my 76PA on 30M (driven 
by my Elecraft K2, to get up to 200W out) and FRIED the choke about 15-20 
turns up from the bottom.

Other than this, the choke has worked great for me on all OTHER bands. 
Though I've not tried it on 160M (no antenna).

If you'd like to see the DOCs, just ask. >>