|[AMRadio] GG 813 Linear in GE Ham News|
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
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
>>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
>>Thanks for any info,
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