[AMRadio] GG 813 Linear in GE Ham News


Jim Wilhite w5jo at brightok.net
Wed Sep 28 13:53:03 EDT 2005


Barker & Williamson (B&W) built a Ground Grid Amplifier out 
of two 813s if you are interested.  The manual is on BAMA. 
It is the LPA 1

73  Jim
W5JO


Rev. Don Sanders wrote:
> I would like a copy of the article. I have an amp in process-gathering parts
> now-was thinking of 4 572B's but 813 is good tube.
> 
> Healthfully yours,
>                           DON W4BWS
> ----- Original Message ----- 
> From: <doxemf at aol.com>
> To: <amradio at mailman.qth.net>
> Sent: Wednesday, September 28, 2005 12:25 AM
> Subject: [AMRadio] GG 813 Linear in GE Ham News
> 
> 
> 
>>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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