Return-Path: Received: from rly-md08.mx.aol.com (rly-md08.mail.aol.com [172.20.29.146]) by air-md03.mail.aol.com (v121.4) with ESMTP id MAILINMD033-91d47c89a203ad; Fri, 29 Feb 2008 18:50:08 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-md08.mx.aol.com (v121.4) with ESMTP id MAILRELAYINMD085-91d47c89a203ad; Fri, 29 Feb 2008 18:49:55 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1JVEyO-0006ua-Te for rs_out_1@blacksheep.org; Fri, 29 Feb 2008 23:49:04 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1JVEyO-0006uR-HM for rsgb_lf_group@blacksheep.org; Fri, 29 Feb 2008 23:49:04 +0000 Received: from smarthost3.mail.uk.easynet.net ([212.135.6.13]) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1JVEyL-0007rp-Iz for rsgb_lf_group@blacksheep.org; Fri, 29 Feb 2008 23:49:04 +0000 Received: from bb-87-82-5-233.ukonline.co.uk ([87.82.5.233] helo=[192.168.0.3]) by smarthost3.mail.uk.easynet.net with esmtp (Exim 4.10) id 1JVEyG-000Cen-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Feb 2008 23:48:56 +0000 Message-ID: <47C89AA8.70805@ukonline.co.uk> Date: Fri, 29 Feb 2008 23:52:08 +0000 From: Peter Dodd User-Agent: Thunderbird 2.0.0.12 (Windows/20080213) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <000001c87a63$13267ea0$8700a8c0@rtv5f9d8dfdf44> <47C753BC.3060006@ukonline.co.uk> <004901c87abb$636f7120$0301a8c0@g3kev> <47C82E82.20200@ukonline.co.uk> <000901c87b17$0b094400$0201a8c0@ken> In-Reply-To: <000901c87b17$0b094400$0201a8c0@ken> X-Spam-Score: -0.2 (/) X-Spam-Report: autolearn=disabled,AWL=-0.152 Subject: Re: LF: RE: G3LDO 500kHz rig Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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-AOL-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_helo : n X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_822_from : n X-Mailer: Unknown (No Version) Ken M0KHW wrote > How many watts is the PL519 running?, I have some 807s I was thinking of > using, but they like 750 volts on the anode. > The PL509/519 is very rugged and will give far more power than an 807 at relatively low HT voltages. I run my PL519 at around 80watts output although it is capable of a bit more without exceeding the anode dissipation. The only downside is that the PL509/519 requires 40v for the heaters but I had a suitable transformer in one of my many junk boxes. In 1998 LX1PD used a transmitter on 136kHz that used 16 PL36s in parallel. The PL36 was also a TV line TB valve. regards Peter, G3LDO