X-GM-THRID: 1234367211889047480 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.35.22.8 with SMTP id z8cs185865pyi; Sat, 21 Apr 2007 12:38:27 -0700 (PDT) Received: by 10.67.98.9 with SMTP id a9mr3837341ugm.1177184306932; Sat, 21 Apr 2007 12:38:26 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id 59si8883435ugf.2007.04.21.12.38.24; Sat, 21 Apr 2007 12:38:26 -0700 (PDT) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1HfLKy-0002fa-FQ for rs_out_1@blacksheep.org; Sat, 21 Apr 2007 20:33:36 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1HfLKx-0002fR-R9 for rsgb_lf_group@blacksheep.org; Sat, 21 Apr 2007 20:33:35 +0100 Received: from imo-d04.mx.aol.com ([205.188.157.36]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1HfLKv-0003ti-77 for rsgb_lf_group@blacksheep.org; Sat, 21 Apr 2007 20:33:35 +0100 Received: from ColePe@aol.com by imo-d04.mx.aol.com (mail_out_v38_r8.1.) id l.d3d.69e3a79 (58550) for ; Sat, 21 Apr 2007 15:33:21 -0400 (EDT) From: ColePe@aol.com Message-ID: Date: Sat, 21 Apr 2007 15:33:21 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 9.0 SE for Windows sub 5022 X-Spam-Flag: NO X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,NO_REAL_NAME=0.55 Subject: LF: 500KHz reception. Content-Type: multipart/alternative; boundary="-----------------------------1177184001" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_MESSAGE,NO_REAL_NAME 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 Status: O X-Status: X-Keywords: X-UID: 2342 -------------------------------1177184001 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit >From Peter, G3JFS in Plymouth. Locator IO70WJ. Hi all, last night (Friday) I made my first primitive attempt at receiving on 500 KHz. With an untuned/unmatched random wire fed via about 50 ft of coax and an FT1000MP Mk-V I had excellent copy of GI4DPE from about 2300 to 2315 when I shut up shop for the night. S meter readings were meaningless but the signal painted a very clear trace on the spectran waterfall with occasional qsb into noise. There are problems to solve as I live less than a mile away from the local MW broadcast transmitting station. I don't know how much power is radiated, or how many transmitters are fed into the aerial but I know it puts out quite a few spurious signals and intermodulation products as well as overloading my receiver front end to generate more - I once measured 19 volts dc output from the detector of a crystal set (with a high impedance meter) connected to a 120 ft long end fed wire. Like comments I've seen on other rigs my FT1000MP has a big drop in gain when tuning above 500 KHz. The sensitivity is a bit on the low side but I am sure that a tuned aerial and low gain preselector will allow me to use the rig for more serious reception. Encouraged by my receiving test I have applied for an NOV and hope to join you the band before too long. 73, Peter -------------------------------1177184001 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

From Peter, G3JFS in Plymouth.

Locator IO70WJ.

Hi all,

last night (Friday) I made my first primitive attempt at receiving on 5= 00=20 KHz. With an untuned/unmatched random wire fed via about 50 ft of coax= and=20 an FT1000MP Mk-V I had excellent copy of GI4DPE from about 2300 to 2315= =20 when I shut up shop for the night. S meter readings were meaningless but the= =20 signal painted a very clear trace on the spectran waterfall with occasi= onal=20 qsb into noise.

There are problems to solve as I live less than a mile away from the lo= cal=20 MW broadcast transmitting station. I don't know how much power is=20 radiated, or how many transmitters are fed into the aerial but I know it put= s=20 out quite a few spurious signals and intermodulation products as well a= s=20 overloading my receiver front end to generate more - I once measured 19= =20 volts dc output from the detector of a crystal set (with a high=20 impedance meter) connected to a 120 ft long end fed wire.

Like comments I've seen on other rigs my FT1000MP has a=20= big=20 drop in gain when tuning above 500 KHz. The sensitivity is a bit on th= e=20 low side but I am sure that a tuned aerial and low gain preselector will all= ow=20 me to use the rig for more serious reception.

Encouraged by my receiving test I have applied for an NOV and hope to j= oin=20 you the band before too long.

73, Peter

-------------------------------1177184001--