Return-Path: Received: (qmail 10443 invoked from network); 9 Oct 2001 11:01:57 -0000 Received: from unknown (HELO warrior-inbound.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 9 Oct 2001 11:01:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 26123 invoked from network); 9 Oct 2001 10:59:43 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Oct 2001 10:59:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15quVj-0003P3-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 09 Oct 2001 11:53:19 +0100 Received: from imo-d04.mx.aol.com ([205.188.157.36]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15quVh-0003Oy-00 for rsgb_lf_group@blacksheep.org; Tue, 09 Oct 2001 11:53:18 +0100 Received: from G0MRF@aol.com by imo-d04.mx.aol.com (mail_out_v31_r1.7.) id l.11c.5a02dde (3877) for ; Tue, 9 Oct 2001 06:52:01 -0400 (EDT) From: G0MRF@aol.com Message-ID: <11c.5a02dde.28f430d0@aol.com> Date: Tue, 9 Oct 2001 06:52:00 EDT Subject: Re: LF: Power Supply To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows UK sub 10505 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit In a message dated 10/8/01 5:22:14 PM GMT Daylight Time, peter.jackson17@ntlworld.com writes:


Hi, I am thinking of buying a new PSU, has anyone any experience with Switch
Mode PSU's. Is there any sproggies on 137Kz? The PSU I am particularly
interested in is the Diamond GZV-2500, any advice welcome. Still just a SWL
on VLF but that could change soon, 73 Pete G3KNU





Hello Pete.

I have the Kenwood SMPSU and that one seems OK on 136 and 73k.
Two other commercial lab supplies, one from 'Farnell' and another from Scandinavia, both have very high levels on 136k.
Maybe the latest amateur supplies work above 136k or possibly make use of quasi resonant topologies that would suppress RFI to some extent.

Anyway.....The Kenwood's OK.

David  G0MRF