[amsat-bb] Re: Winter Project

wrb wrb at bristor-assoc.com
Thu Jan 7 08:28:38 PST 2010

I would try to locate old QSTs or Amateur Radio Handbooks that contained 
such circuits. Tubes such as 6146, 829, etc. were good candidates. Also 
the 4x/4CX150 would give up to 100+ out with just a few watts in. Newer 
handbooks or magazines still provide you with he necessary theory to 
build one from scratch. Building a tube amp is quite simple, just need 
to have 300 - 1000 volts dc supply based on tube and power out. Also, 
usually a 6.3vc transformer for filaments. Nothing wrong with tube amps. 
I have an old Johnson 6n2 unit that runs about 150 watts. Neat old rig. 
Find an old rig as I mentioned above and go online to the various manual 
websites and obtain the manual for an old rig. You can use that as your 

Reid, W4UPD

Douglas Anoman wrote:
> I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
> Thank You
> Douglas Anoman
> Amsat #37043

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