[AMRadio] GG 813 Linear in GE Ham News

Gary Schafer garyschafer at comcast.net
Wed Sep 28 22:24:02 EDT 2005

A pair of 813s in GG are only good for 150 watts carrier out on AM.

Gary  K4FMX

doxemf at aol.com wrote:
> Hello All,
> The thread on final circuits has been great to follow especially with the mention of 813's.
> It is still a very cost effective tube and in good supply NOS since the audio crowd has yet to make much use of them.
>   I have a copy of GE Ham News from Nov-Dec 1959 that features a "Kilowatt Grounded-Grid Linear Amplifier" to quote the cover.
>   It uses a pair of 813s GG with a standard Pi Net output configuration 5 band switched 80 -10 mtrs.
> Looks real easy to build and with the exception of the B&W filament choke FC-15, I have most of the needed parts or 
> can find them. The construction article is well documented and pictured.
>   Is anyone is familiar with this amplifier or better yet knows of one being built? If 160 meters would be easy to extend to with more L & C where needed then it would work well for anyone with a good drive source.
> For those that do not have the Ham News Issue I can scan a copy and e-mail it.
> Thanks for any info,
> Bill  KB3DKS/1
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