To: rsgb_lf_group@blacksheep.org References: <000001c51988$787c8400$dae4fc3e@l8p8y6> Date: Wed, 23 Feb 2005 19:06:36 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-SPF-Result: relay.thorcom.net: 212.250.162.19 is neither permitted nor denied by domain of ukonline.co.uk X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=failed,HTML_50_60=0.095,HTML_MESSAGE=0.001 Subject: LF: Re: 807 tubes Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Filtered: by PlusNet SpamCORE (v3.00) Content-transfer-encoding: 8bit

but you are talking about power amplifiers. I have never seen such items in single rx RF stages. Not enough gain.

My line up as a VS2 in the darkest jungle was a string of 807 doublers /drivers to an 813 glowing in the dusk like a lighthouse attracting every variety of flying insect including flying stag beetles several inches long which made the mistake of flying near the tank coil.

I have no idea why the type-face has changed herein.

Bryan

----- Original Message -----

From: hamilton mal

To: rsgb_lf_group@blacksheep.org

Sent: Wednesday, February 23, 2005 12:29 AM

Subject: LF: 807 tubes

During the 1950 period and beyond the 807 tube was the norm for wideband/distribution amplifiers used on receiving stations. The 6V6, 6L6 and 807 were also used in a variety of other ancillary equipment. This was overkill in most cases but I suppose these tubes were plentiful and cheap at the time. The equipment was desgined and built around these tubes. One other tube popular at the time was the 813 for transmitters like the RCA ET4336 TX but to mention one.

The advantage of this trend was that tubes were interchangeable between equipment units.

There were also 12 v versions of the above tubes, again popular in mobile and aeronautical equipment like the Collins and Bendex transmitters.

73 de Mal/G3KEV