Envelope-to: dave@picks.force9.co.uk Delivery-date: Wed, 06 Jul 2005 11:19:25 +0100 Received: by ptb-mxcore15.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1Dq701-0000eV-5n for dave@picks.force9.co.uk; Wed, 06 Jul 2005 11:19:25 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore15.plus.net with esmtp (PlusNet MXCore v2.00) id 1Dq701-0000eN-2L for dave@picks.force9.co.uk; Wed, 06 Jul 2005 11:19:25 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Dq6zW-0007dh-0F for rs_out_1@blacksheep.org; Wed, 06 Jul 2005 11:18:54 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Dq6zV-0007dY-JN for rsgb_lf_group@blacksheep.org; Wed, 06 Jul 2005 11:18:53 +0100 Received: from mk-smarthost-8.mail.uk.tiscali.com ([212.74.114.47]) by relay1.thorcom.net with esmtp (Exim 4.51) id 1Dq72f-0006W5-58 for rsgb_lf_group@blacksheep.org; Wed, 06 Jul 2005 11:22:11 +0100 Received: from dsl-80-43-17-247.access.as9105.com ([80.43.17.247]:1654 helo=tcs01) by mk-smarthost-8.mail.uk.tiscali.com with smtp (Exim 4.30) id 1Dq6zN-000KwW-TY for rsgb_lf_group@blacksheep.org; Wed, 06 Jul 2005 10:18:45 +0000 From: "Gary - G4WGT" To: rsgb_lf_group@blacksheep.org Date: Wed, 6 Jul 2005 11:18:09 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: <000a01c5820a$ab7ff220$b55e7ad5@Main> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal Subject: LF: RE: G0MRF 300w Tx PA mods Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit 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-PN-SpamFiltered: by PlusNet MXCore (v2.00) Hi Alan, OK on the psu, should be no problem with reggies, the 24V is for the original twin Xtal VXO which only now use on the bench for testing, an external DDS VFO is used now & the 12V is constant anyway with no load changes. I'll have a look at the electronic fuse. I don't monitor the PA supply volts contiuously only check when calculating PA power but my digi voltmeter would not react quick enough to see a very short duration increase. I will keep you posted. Regards, Gary - G4WGT - IO83qp Web : http://myweb.tiscali.co.uk/wgtaylor -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Alan Melia Sent: 05 July 2005 21:40 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: RE: Re: RE: G0MRF 300w Tx PA mods Hi Gary Ah that won't give any trouble, just make sure you have enough "headroom" for the 3 legged reggies....4v should be enough but marginal if you have droop under load. You have nothing active in the main supply to take exception to strange loads. I think there is an electronic fuse on Dave G3YXM's site that might be useful.....I dont know whether you would sense a supply current increase before the failure. Alan