Return-Path: Received: (qmail 40641 invoked from network); 23 Feb 2005 18:35:40 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore01.plus.net with SMTP; 23 Feb 2005 18:35:40 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1D41N7-000Hoe-KH for dave@picks.force9.co.uk; Wed, 23 Feb 2005 18:36:33 +0000 Received: from [192.168.67.3] (helo=ptb-mxcore03.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1D41N5-000Hnz-4W for dave@picks.force9.co.uk; Wed, 23 Feb 2005 18:36:27 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1D41Nd-0006j8-Ng for dave@picks.force9.co.uk; Wed, 23 Feb 2005 18:37:01 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1D41Jg-0005gw-Ut for rs_out_1@blacksheep.org; Wed, 23 Feb 2005 18:32:56 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1D41Je-0005gg-I9 for rsgb_lf_group@blacksheep.org; Wed, 23 Feb 2005 18:32:54 +0000 Received: from fh1022.dia.cp.net ([64.97.168.32] helo=n064.sc1.cp.net) by relay.thorcom.net with esmtp (Exim 4.43) id 1D41Jc-0006tc-1l for rsgb_lf_group@blacksheep.org; Wed, 23 Feb 2005 18:32:54 +0000 Received: from l8p8y6 (62.252.228.218) by n064.sc1.cp.net (7.0.038) id 420C3C5100185359 for rsgb_lf_group@blacksheep.org; Wed, 23 Feb 2005 18:32:48 +0000 Message-ID: <000001c51988$787c8400$dae4fc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org Date: Wed, 23 Feb 2005 00:29:16 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 X-SPF-Result: relay.thorcom.net: 64.97.168.32 is neither permitted nor denied by domain of virgin.net X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=failed,HTML_40_50=0.086,HTML_MESSAGE=0.001 Subject: LF: 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=0.9 required=5.0 tests=DATE_IN_PAST_12_24,HTML_20_30, 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

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