Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mh04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6A43B38000093; Wed, 27 Jun 2012 02:40:45 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Sjluj-00009s-RR for rs_out_1@blacksheep.org; Wed, 27 Jun 2012 07:39:45 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Sjluj-00009j-4N for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2012 07:39:45 +0100 Received: from mail-we0-f171.google.com ([74.125.82.171]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1Sjluh-0002Ka-3t for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2012 07:39:44 +0100 Received: by wejx9 with SMTP id x9so994415wej.16 for ; Tue, 26 Jun 2012 23:39:42 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:references:from:content-type:x-mailer:in-reply-to :message-id:date:to:content-transfer-encoding:mime-version; bh=B1rFMCcb5pxQC1wM+wBAHb/s+9Mt/GfC8CR8JjAipbM=; b=E5U44+mUQ4V/6AIgXxaJqlnWnfmsSIOKEf+7POGJ2mirc/bgdhfcO5efxpf+WA3uU9 BWp8YhuiPIUBDgJlOyX3n/Wn7tNShe79i3ADqtmT6b6zSJgvp56bfaoJ8kPD/L2u8qxQ mKgSQDz4LhSdDioSuBO3j1qi6hZN2i0SGuxdNYE0Q6BkbnOjHXdS4PM5laVXHlfOC89g M70Ws+2ha7ADpgPruFd7OVPcjNdlch70In+tR+FtaLHuNp5DgOYx9at2Rqa83tnkzmD4 AQ1VDP6DwPBhg8ZPE2LrjBIL799Y9shtrUsZInkNDXKX0AR70GOOuABgXqvI6g+9iSlq XYnw== Received: by 10.216.220.89 with SMTP id n67mr780286wep.73.1340779181871; Tue, 26 Jun 2012 23:39:41 -0700 (PDT) Received: from [192.168.1.132] ([146.90.214.227]) by mx.google.com with ESMTPS id q6sm9432929wiy.0.2012.06.26.23.39.40 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 26 Jun 2012 23:39:41 -0700 (PDT) References: <002801cd536e$76b08400$0401a8c0@xphd97xgq27nyf> <172D1CB5F32F43A790DBC99A73F73D59@AGB> <1340728957.15592.YahooMailNeo@web171601.mail.ir2.yahoo.com> <1340745569.6806.YahooMailNeo@web29606.mail.ird.yahoo.com> From: Roger Lapthorn X-Mailer: iPod Mail (9B206) In-Reply-To: <1340745569.6806.YahooMailNeo@web29606.mail.ird.yahoo.com> Message-Id: <1A5C09CA-65A9-4F82-835D-0AEF6261F24F@gmail.com> Date: Wed, 27 Jun 2012 07:39:35 +0100 To: "rsgb_lf_group@blacksheep.org" Mime-Version: 1.0 (1.0) X-Spam-Score: 0.3 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. 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Content preview: If you mean for 500kHz permits, I believe OFCOM is only renewing existing NOVs. 472-479kHz will not need an NOV once allocated Jan 1st 2013 (maybe sooner?). 73s Roger G3XBM -- Via my 2.4GHz transceiver -- [...] Content analysis details: (0.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [74.125.82.171 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rogerlapthorn[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid 1.0 FREEMAIL_REPLY From and body contain different freemails X-Scan-Signature: fb42d311bf65eb51bbb8124890b4f977 Subject: Re: LF: A/G FREQS Content-Type: multipart/alternative; boundary=Apple-Mail-496F772C-8DDD-4E0A-8F2B-CDB6CC09AD53 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=0.5 required=5.0 tests=HTML_40_50,HTML_MESSAGE, TO_ADDRESS_EQ_REAL 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-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:443615680:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d021.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d60d84feaaaec2528 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --Apple-Mail-496F772C-8DDD-4E0A-8F2B-CDB6CC09AD53 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii If you mean for 500kHz permits, I believe OFCOM is only renewing existing NO= Vs. 472-479kHz will not need an NOV once allocated Jan 1st 2013 (maybe soone= r?). 73s Roger G3XBM -- Via my 2.4GHz transceiver -- On 26 Jun 2012, at 22:19, julie wrote: > Hi can any one give me some advice on how to fill out ofcoms nov, i am a b= it stuck. > David G6WGZ >=20 > From: Gary G4WGT > To: LF Group =20 > Sent: Tuesday, 26 June 2012, 18:51 > Subject: RE: LF: A/G FREQS >=20 > Hi All, > =20 > Pete M0FMT wrote :- > When I were a Jate we only had one xtal and a QQV02-6 on 432.00 amplitude m= odulated on the plate in the good old days. > =20 > That was my very first transmitter.....And don't forget...."Tuning high to= low for a reply". > =20 > That takes me back :-) > =20 > 73, > =20 > Gary - G4WGT. >=20 > =20 > Date: Tue, 26 Jun 2012 17:42:37 +0100 > From: m0fmt@yahoo.co.uk > To: rsgb_lf_group@blacksheep.org > Subject: Re: LF: A/G FREQS >=20 > Well Graham when I were a Jate we only had one xtal and a QQV02-6 on 432.0= 0 amplitude modulated on the plate in the good old days. After all its just t= he product of mixing two frequencies 432 with audio in a nonlinear device li= ke a Class C amp works from almost DC to light!. Nowerdays I guess you would= PWM the carrier on the PA gate/ base producing the same effect and using co= nsiderably less power over all. Class E an all. > 73 es GL Pete M0FMT IO91UX > From: Graham > To: rsgb_lf_group@blacksheep.org=20 > Sent: Tuesday, 26 June 2012, 17:09 > Subject: Re: LF: A/G FREQS >=20 > Steady on Mal ! this is getting technical !" > =20 > Your right , FM has a cut off point , where demodulation fails and = also a capture effect , where the stronger of 2 signals will acquire= and hold the demodulator ..always fun on 2 mtrs when a mobile su= ddenly takes the channel > =20 > Am has no cut off point , but gradual degradation until the recover= ed audio is no longer usable ......eg, mcw would readable much lowe= r than AM speech > =20 > I think much over 250/300 MHz its actually not possible to produce= AM , could be wrong , but there is a limit , may be by high lev= el modulation falls over , dont see why could not be via transvertin= g ....... > =20 > G.. > From: mal hamilton > Sent: Tuesday, June 26, 2012 8:36 AM > To: rsgb > Subject: LF: A/G FREQS >=20 > As stated Air/Ground vhf/uhf is AM and simplex working. I have also notic= ed a well modulated AM transmitter is more potent than a FM transmitter when= working at max range. On AM the RX bandwidth can be opened up to receive se= veral stations simultaneously then select the one of interest by closing dow= n the selectivity, the same applies on CW. On FM if you tried this the tran= smission would fall into a black hole, in other words the FM rx has to be ta= ilored to the exact bandwidth of the transmission (same deviation value) > g3kev > =20 >=20 >=20 >=20 >=20 --Apple-Mail-496F772C-8DDD-4E0A-8F2B-CDB6CC09AD53 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=utf-8
If you mean for 500kHz permits, I believe OFCOM is only renewing existing NOVs. 472-479kHz will not need an NOV once allocated Jan 1st 2013 (maybe sooner?).

73s
Roger G3XBM

-- Via my 2.4GHz transceiver --

On 26 Jun 2012, at 22:19, julie <julieblinx@yahoo.com> wrote:

Hi can any one give me some advice on how to fill out ofcoms nov, i am a bit stuck.
David G6WGZ

From: Gary G4WGT <g4wgt@tiscali.co.uk>
To: LF Group <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, 26 June 2012, 18:51
Subject: RE: LF: A/G FREQS

Hi All,
 
Pete M0FMT wrote :-
When I were a Jate we only had one xtal and a QQV02-6 on 432.00 amplitude modulated on the plate in the good old days.
 
That was my very first transmitter.....And don't forget...."Tuning high to low for a reply".
 
That takes me back  :-)
 
73,
 
Gary - G4WGT.

 
Date: Tue, 26 Jun 2012 17:42:37 +0100
From: m0fmt@yahoo.co.uk
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: A/G FREQS

Well Graham when I were a Jate we only had one xtal and a QQV02-6 on 432.00 amplitude modulated on the plate in the good old days. After all its just the product of mixing two frequencies 432 with audio in a nonlinear device like a Class C amp works from almost DC to light!. Nowerdays I guess you would PWM the carrier on the PA gate/ base producing the same effect and using considerably less power over all. Class E an all.
73 es GL Pete M0FMT IO91UX
From: Graham <g8fzk@g8fzk.fsnet.co.uk>
To: rsgb_lf_group@blacksheep.org
Sent: Tuesday, 26 June 2012, 17:09
Subject: Re: LF: A/G FREQS

Steady on Mal !   this  is getting  technical  !"
 
Your  right  , FM has a  cut off  point  , where  demodulation fails  and  also  a  capture  effect , where the  stronger of  2 signals  will  acquire  and  hold the  demodulator ..always   fun  on 2  mtrs   when a  mobile  suddenly  takes  the  channel
 
Am  has no  cut off  point , but  gradual  degradation  until the  recovered  audio  is no  longer usable  ......eg,  mcw  would  readable  much  lower  than  AM speech
 
I think  much over  250/300 MHz   its  actually  not  possible to  produce  AM  , could be  wrong  , but  there is a  limit  , may   be  by  high  level  modulation falls over , dont  see  why  could  not  be  via  transverting  .......
 
G..
Sent: Tuesday, June 26, 2012 8:36 AM
To: rsgb
Subject: LF: A/G FREQS

As stated Air/Ground vhf/uhf is AM and simplex working.  I have also noticed a well modulated AM transmitter is more potent than a FM transmitter when working at max range. On AM the RX bandwidth can be opened up to receive several stations simultaneously then select the one of interest by closing down the selectivity, the same applies on CW.  On FM if you tried this the transmission would fall into a black hole, in other words the FM rx has to be tailored to the exact bandwidth of the transmission (same deviation value)
g3kev
 




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