Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mh06.r1000.mx.aol.com (Internet Inbound) with ESMTP id A174038000121; Tue, 26 Jun 2012 12:43:43 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SjYqf-0006T9-Mo for rs_out_1@blacksheep.org; Tue, 26 Jun 2012 17:42:41 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SjYqf-0006T0-4C for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2012 17:42:41 +0100 Received: from nm5.bullet.mail.ird.yahoo.com ([77.238.189.62]) by relay1.thorcom.net with smtp (Exim 4.77) (envelope-from ) id 1SjYqd-0008AO-4a for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2012 17:42:40 +0100 Received: from [77.238.189.50] by nm5.bullet.mail.ird.yahoo.com with NNFMP; 26 Jun 2012 16:42:38 -0000 Received: from [212.82.108.237] by tm3.bullet.mail.ird.yahoo.com with NNFMP; 26 Jun 2012 16:42:38 -0000 Received: from [127.0.0.1] by omp1002.mail.ird.yahoo.com with NNFMP; 26 Jun 2012 16:42:38 -0000 X-DKIM-Result: Domain=yahoo.co.uk Result=Good and Known Domain X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 277504.96194.bm@omp1002.mail.ird.yahoo.com Received: (qmail 17822 invoked by uid 60001); 26 Jun 2012 16:42:38 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1340728957; bh=Xrb/yb8qgU6et74Ah8W7LGRABXw8lflZizwTGNlhn7A=; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=wMnMkUHHi4Ahu6jz02aBI4ZvLENzbNtOEVIZqZbtUBedKoOovchPIX5y2Kbxd/EED81THR17WGy3Vg3FAKG4c60OuBATOxa+tV9M6FRQq/QJ7YNBh3uqHCVTuE7Y6CDZ6rxZ7pFfWfO9AFJbvihZ6mVD7m3V/vD5CuulIun9AAY= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=NoBfP0CNkEUeb2mjIQBVJJ24Ne8pTz5RXeB5IEzuBPqkvEsDsHLI6EE+w9RzYIzQq5IgBqnf7Gr8CPkVADQvdeoFNE007CgR0O27j04uDx5mQ3y0IPNm6JCTh407AiT/y1NcixFfT21jb5Syx7yqdSqZ8XW48h1YGuPvNq6rJ2Y=; X-YMail-OSG: MOPA04AVM1mjyknV9_cwptZOh2HokNRigFPMtxna0u.J5.O nKaS1y.Z2cdMix_6NKSS0kNCz9YnQPPQ_gqBOE2LD2a5oSXgZpKIUVbbb3hf ujpSgof3Gc21EnIr7DIqdvxJmPzs5TgFlwaUzVDKI53FWBUIfdW6lkx1HzWI E2AAz6TYVD4sYU6cIwxBH9n6VZ0KHQ_To9dWIi1i4R8tgmP2ohM6A4qyciEY f_CK3wyKO8OQ_vlPOlpY8vPBF3uHfntV7qsCPDaZEXLPxRrfTpBEvnHll0Uq Yxas8ttySniq6yWXocjA3XpOdhouZuT15yD5fXak9q8UhDRDU55T7DOmBUQW AVY4WlRyS1i05QQSK42ttpTsh1rJYMq853E_hi7Bq.EKRB4jdXSBpLFTkXwn .kSm2U1yPSCmMLUaxgsNuBmxT7GjAKMMWXmIhSaDVaZoNesj.44Ii2w-- Received: from [86.164.61.75] by web171601.mail.ir2.yahoo.com via HTTP; Tue, 26 Jun 2012 17:42:37 BST X-Mailer: YahooMailWebService/0.8.118.349524 References: <002801cd536e$76b08400$0401a8c0@xphd97xgq27nyf> <172D1CB5F32F43A790DBC99A73F73D59@AGB> Message-ID: <1340728957.15592.YahooMailNeo@web171601.mail.ir2.yahoo.com> Date: Tue, 26 Jun 2012 17:42:37 +0100 (BST) From: M0FMT To: "rsgb_lf_group@blacksheep.org" In-Reply-To: <172D1CB5F32F43A790DBC99A73F73D59@AGB> MIME-Version: 1.0 X-Spam-Score: 1.0 (+) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 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. [...] Content analysis details: (1.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [77.238.189.62 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (m0fmt[at]yahoo.co.uk) 0.0 HTML_MESSAGE BODY: HTML included in message 1.0 FSL_FREEMAIL_1 FSL_FREEMAIL_1 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 3d0ae5b4ae8b74dc4bf5c1dbe3fef430 Subject: Re: LF: A/G FREQS Content-Type: multipart/alternative; boundary="-1613889061-1785466553-1340728957=:15592" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,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: 0:2:443198592:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d268.2 ; domain : yahoo.co.uk DKIM : fail x-aol-sid: 3039ac1d60da4fe9e6be5e45 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ---1613889061-1785466553-1340728957=:15592 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Well Graham when I were a Jate we only had one xtal and a QQV02-6 on 432.00= amplitude modulated on the plate=A0in the good old days. After all its jus= t the product of mixing two frequencies 432 with=A0audio in a nonlinear dev= ice like a Class C amp works from almost DC to light!. Nowerdays I guess yo= u would PWM the carrier on the PA gate/ base producing the same effect and = using considerably less power over all. Class E an all.=0A=0A73 es GL Pete = M0FMT IO91UX=0A=0A=0A________________________________=0A From: Graham =0ATo: rsgb_lf_group@blacksheep.org =0ASent: Tuesday, 2= 6 June 2012, 17:09=0ASubject: Re: LF: A/G FREQS=0A =0A=0A =0ASteady on Ma= l !=A0=A0 this=A0 is getting=A0 technical=A0 =0A!" =0A=0AYour=A0 right=A0 ,= FM has a=A0 cut off=A0 point=A0 , =0Awhere=A0 demodulation fails=A0 and=A0= also=A0 a=A0 capture=A0 =0Aeffect , where the=A0 stronger of=A0 2 signals= =A0 will=A0 =0Aacquire=A0 and=A0 hold the=A0 demodulator ..always=A0=A0 =0A= fun=A0 on 2=A0 mtrs=A0=A0 when a=A0 mobile=A0 suddenly=A0 =0Atakes=A0 the= =A0 channel =0A=0AAm=A0 has no=A0 cut off=A0 point , but=A0 gradual=A0 =0A= degradation=A0 until the=A0 recovered=A0 audio=A0 is no=A0 longer =0Ausable= =A0 ......eg, =A0mcw=A0 would=A0 readable=A0 much=A0 =0Alower=A0 than=A0 AM= speech =0A=0AI think=A0 much over=A0 250/300 MHz=A0=A0 its=A0 =0Aactually= =A0 not=A0 possible to=A0 produce=A0 AM=A0 , could =0Abe=A0 wrong=A0 , but= =A0 there is a=A0 limit=A0 , may=A0=A0 =0Abe=A0 by=A0 high=A0 level=A0 modu= lation falls over , dont=A0 =0Asee=A0 why=A0 could=A0 not=A0 be=A0 via=A0 t= ransverting=A0 =0A....... =0A=0AG..=0A =0AFrom: mal hamilton =0ASent: Tue= sday, June 26, 2012 8:36 AM =0ATo: rsgb =0ASubject: LF: A/G FREQS =0A =0AA= s stated Air/Ground vhf/uhf is AM and =0Asimplex=A0working. =A0I have also = noticed a well modulated AM transmitter =0Ais more potent than a FM transmi= tter when working at max range. On AM the RX =0Abandwidth can be opened up = to receive several stations simultaneously then =0Aselect the one of intere= st by closing down the selectivity, the same applies on =0ACW. =A0On FM if = you tried this the=A0transmission would fall into a black =0Ahole, in other= words the=A0FM rx has to be tailored to the =0Aexact=A0bandwidth of the tr= ansmission (same deviation value) =0Ag3kev ---1613889061-1785466553-1340728957=:15592 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Well Graham when I were a= Jate we only had one xtal and a QQV02-6 on 432.00 amplitude modulated on t= he plate in the good old days. After all its just the product of mixin= g 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 car= rier 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 IO91= UX
<= div style=3D"margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204,= 204); height: 0px; line-height: 0; font-size: 0px;" class=3D"hr" contentEditable=3D"false" readonly=3D"true">
From: Graham <g8fzk@g8fzk.fsnet.co.uk>
= To: rsgb_lf_group@blacksh= eep.org
Sent: Tuesday= , 26 June 2012, 17:09
Subject: Re: LF: A/G FREQS

=0A=0A =0A =0A<= style>=0A=0A
=0A
Steady on Mal !   this  is = getting  technical  =0A!"
=0A
 
=0A
Your&n= bsp; right  , FM has a  cut off  point  , =0Awhere = ; demodulation fails  and  also  a  capture  =0Aef= fect , where the  stronger of  2 signals  will  =0Aacqu= ire  and  hold the  demodulator ..always   =0Afun&= nbsp; on 2  mtrs   when a  mobile  suddenly  = =0Atakes  the  channel
=0A
 
=0A
Am = has no  cut off  point , but  gradual  =0Adegradation&= nbsp; until the  recovered  audio  is no  longer =0Ausa= ble  ......eg,  mcw  would  readable  much  = =0Alower  than  AM speech
=0A
 
=0A
I thi= nk  much over  250/300 MHz   its  =0Aactually = ; not  possible to  produce  AM  , could =0Abe  wr= ong  , but  there is a  limit  , may   =0Abe&= nbsp; by  high  level  modulation falls over , dont  = =0Asee  why  could  not  be  via  transvertin= g  =0A.......
=0A
 
=0A
G..
=0A
=0A
=0A=0A
S= ent: Tuesday, June 26, 2012 8:36 AM
=0A
To: rsgb
=0A
Subject: LF: A/G FREQS
=0A

=0A
As stated Air/Ground vhf= /uhf is AM and =0Asimplex working.  I have also noticed a well mo= dulated AM transmitter =0Ais more potent than a FM transmitter when working= at max range. On AM the RX =0Abandwidth can be opened up to receive severa= l stations simultaneously then =0Aselect the one of interest by closing dow= n the selectivity, the same applies on =0ACW.  On FM if you tried this= the transmission would fall into a black =0Ahole, in other words the&= nbsp;FM rx has to be tailored to the =0Aexact bandwidth of the transmi= ssion (same deviation value)
=0A
g3kev=
=0A
 
=0A


= ---1613889061-1785466553-1340728957=:15592--