Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mg01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 9AEE53800010D; Tue, 10 Jul 2012 13:17:55 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Soe3g-0003eJ-Gu for rs_out_1@blacksheep.org; Tue, 10 Jul 2012 18:17:08 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Soe3f-0003eA-Lj for rsgb_lf_group@blacksheep.org; Tue, 10 Jul 2012 18:17:07 +0100 Received: from nm13.bullet.mail.ird.yahoo.com ([77.238.189.66]) by relay1.thorcom.net with smtp (Exim 4.77) (envelope-from ) id 1Soe3d-0007SB-Dc for rsgb_lf_group@blacksheep.org; Tue, 10 Jul 2012 18:17:06 +0100 Received: from [77.238.189.50] by nm13.bullet.mail.ird.yahoo.com with NNFMP; 10 Jul 2012 17:17:04 -0000 Received: from [212.82.108.254] by tm3.bullet.mail.ird.yahoo.com with NNFMP; 10 Jul 2012 17:17:04 -0000 Received: from [127.0.0.1] by omp1019.mail.ird.yahoo.com with NNFMP; 10 Jul 2012 17:17:04 -0000 X-DKIM-Result: Domain=yahoo.co.uk Result=Good and Known Domain X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 486269.83817.bm@omp1019.mail.ird.yahoo.com Received: (qmail 77962 invoked by uid 60001); 10 Jul 2012 17:17:04 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1341940624; bh=SRljlPkK8yb9pfkGJLNI3Ix0Jd2qXHZkOMQ19rQWTQg=; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=YMLugDVQz3v6c2p4ykEeophc7G4f6J6nxfVPlsTZZGE6xLSpe/L1kBKlePyCa81fMVrqAy5apfVKLj1oUXBMphDQcbt/IRNMLvZHbE1svYFTl1X5XSnfeaw+u+2vr9NO6O17FGnYg7WH1mZhDKNDtdAxxJjXM3+5yXTQ7i47TWU= 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=qf4a5mZV3yRgOs0bGYMX4nyTSdXhKchehVzsLWEHqxUmkN6qWFuG0AqKxuzJMqLSurtR26TqDM4+ztbcbl+e/tGvUztNHAbBMjxe+dLylFSxd20vPwGL+Wn6XXh1h0rMSRSbgm7ZsWvugc0COtoV06UCr9evCqKsztfsolCRfYc=; X-YMail-OSG: WqNMNoMVM1m56huuEC82Gry7nPyilHsjz88u73fkgwLrjff nnENqMfI_3HMDik_PIpVsSuGHcTnJepXpMEbvQZ3t3iwMDV7leXBNOwh7ZjS w4gUnVNxDGFQmq78SNnxu4joxM2d2.CElkJDCPA81TiF_usd5TKKrY1ZU.ZT XCEx41HiLsW61kyZpjyNsEMc3U4VSBV4Su3kyfvuL7Nwnk07pesDo2LsSoF0 MhX.v9zQLU.NiRAP6p0wPGVgx7c5QrQP4iblD9bQhn47v4YqwSz4zx5hWwIW 4TqeNhNoYqndya5zu.MHwdbTf0qMgGcW6unA0MP8teDwT1JBUZDl5v24xMzD bvM1DpvH3nfBLqR_eziDdUT2h47eWqBylOjhgX2oqqJBX8K7D5EJ_o3lF7Jl 8S0P9.xXbcUT8CjU0dc436CsS6IOPCIE- Received: from [86.164.168.35] by web171606.mail.ir2.yahoo.com via HTTP; Tue, 10 Jul 2012 18:17:03 BST X-Mailer: YahooMailWebService/0.8.120.356233 References: <4FFA2783.9080906@kpnmail.nl> <1341854812.85253.YahooMailNeo@web171604.mail.ir2.yahoo.com> <1341915060.76392.YahooMailNeo@web171605.mail.ir2.yahoo.com> <1341923384.41558.YahooMailNeo@web171602.mail.ir2.yahoo.com> <4FFC2C4E.5090306@iup.uni-heidelberg.de> <4FFC3518.1030405@xs4all.nl> Message-ID: <1341940623.77325.YahooMailNeo@web171606.mail.ir2.yahoo.com> Date: Tue, 10 Jul 2012 18:17:03 +0100 (BST) From: M0FMT To: "rsgb_lf_group@blacksheep.org" In-Reply-To: MIME-Version: 1.0 X-Spam-Score: 0.0 (/) 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: Hi again Graham "....... Narrow IF filters are not desirable and reduce the performance of the demodulator , better simply use SSB filter" Yes I found that out in use. I was using my both CW filters and the IF shift to crunch down to 200Hz results much inferior to just running the wide SSB filter 2.4kHz! [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [77.238.189.66 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 0.0 FSL_FREEMAIL_2 FSL_FREEMAIL_2 0.0 FSL_FREEMAIL_1 FSL_FREEMAIL_1 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 622b0ca3461797caf37867321c193763 Subject: Re: LF: OPERA Question Content-Type: multipart/alternative; boundary="1386533404-1295055915-1341940623=:77325" 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_20_30,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: 0:2:446883456:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d271.2 ; domain : yahoo.co.uk DKIM : fail x-aol-sid: 3039ac1d60c94ffc63c215c2 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --1386533404-1295055915-1341940623=:77325 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hi again Graham=0A=A0=0A"....... Narrow IF filters are not desirable = and reduce the performance of the demodulator , better simply use S= SB filter.........." =0A=A0=0AYes I found that out in use. I was using my = both CW filters and the IF shift to crunch down to 200Hz results much infer= ior to just running the wide SSB filter 2.4kHz!=0A=0A73 es GL Pete M0FMT IO= 91UX=0A=0A=0A>________________________________=0A> From: Graham =0A>To: rsgb_lf_group@blacksheep.org =0A>Sent: Tuesday, 10 Ju= ly 2012, 16:56=0A>Subject: Re: LF: OPERA Question=0A> =0A>Yes=A0 , with= =A0 one correction=A0 , ( for=A0 audio=A0 drive)=0A>=0A>The=A0 carrier pla= cement=A0 routine, when=A0 Tx is=A0 selected=A0 , scans=A0 the Rx audio=A0= band and selects=A0 the=A0 lowest s/n=A0 spot=A0 frequency in that=A0 rang= e=0A>=0A>So=A0 if you=A0 are=A0 using=A0 a=A0 transverter=A0 (or on freque= ncy=A0 exciter=A0 )=A0 then the TX frequency=A0 is=A0 decided by the=A0 aud= io=A0 drive=A0 frequency=A0 inside the limits=A0 (red-lines)=A0 for=A0 tha= t=A0 mode/speed=0A>=0A>If=A0 using=A0 manual=A0 frequency selection, then= =A0 a Tx=A0 frequency=A0 must=A0 be selected, that=A0 will=A0 produce a=A0 = carrier/hetrodyne=A0 that=A0 falls=A0 inside the audio pass=A0 band=A0 (red= -lines)=A0 defined=A0 by convention as=A0 'dial=A0 set=A0 usb frequency'=0A= >=0A>Changing=A0 the=A0 speed=A0 also=A0 requires a=A0 change=A0 of=A0 freq= uency=A0 to=A0 place the carrier=A0 inside the=A0 correct=A0 filter , autom= ated=A0 if=A0 using=A0 audio-drive.=0A>=0A>Narrow=A0 IF filters=A0 are=A0 = not=A0 desirable=A0 and=A0 reduce the=A0 performance of the=A0 demodulator= =A0 , better=A0 simply=A0 use=A0 SSB=A0 filter=0A>=0A>NB :=A0 The=A0 pass= =A0 band=A0 edges=A0 are=A0 quite=A0 sharp=A0 , so=A0 ensure=A0 you=A0 are = 'inside' and=A0 not=A0 'on the=A0 line'=A0 or=A0 you=A0 may=A0 fail=A0 to= =A0 decode=A0 ....... also=A0 tx / rx=A0 frequency=A0 alignment=A0 may= =A0 place you=A0 out=A0 side ....=A0 i=0A>=0A>Keying=A0 , recommended=A0 th= at=A0 the=A0 TX be=A0 held in 'tx'=A0 , to=A0 prevent=A0 tx/rx change over= =A0 times=A0 from=A0 altering=A0 the=A0 keying=A0 times .... not=A0 100%=A0= a problem , but=A0 to=A0 enable=A0 decodes the=A0 lower levels=A0 , time += /-=A0 and frequency=A0 +/-=A0 need=A0 to=A0 be as=A0 close to the=A0 genera= ted values=A0 as possible=0A>=0A>=0A>GL ..73 -G..=0A>=0A>=0A>-------------= -------------------------------------=0A>From: "Albert" =0A>Sent: Tuesday, July 10, 2012 2:58 PM=0A>To: =0A>Subject: Re: LF:=A0 OPERA=A0 Question=0A>=0A>> Stefan,=0A>> =0A>> D= ownload the Opera program. In the waterfall you will see two red lines, put= the cursor on the lines and read the frequency (upper left window of the w= aterfall display)=A0 Op4 differs from Op8 etc a frequency within this band = is the input of the USB TX so 477kHz + (a frequency between the red lines).= When using CAT control Opera will choose a not occupied freq. in the appro= priate pass band.=0A>> =0A>> 73, Albert=0A>> =0A>> =0A>=0A>=0A>=0A> --1386533404-1295055915-1341940623=:77325 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Hi again Graham
 
"....... Narrow IF filt= ers are not desirable and reduce the performance of the demodulator= , better simply use SSB filter.........."
 
Yes I found that out in use. I was using my both= CW filters and the IF shift to crunch down to 200Hz results much inferior = to just running the wide SSB filter 2.4kHz!

73 es GL P= ete M0FMT IO91UX
From: Gr= aham <g8fzk@g8fzk.fsnet.co.uk>
To: rsgb_lf_group@blacksheep.org
Sent: Tuesday, 10 July 2012, 16:56
Subject: Re: LF: OPERA Question

Yes  , with  one correction  , ( for&n= bsp; audio  drive)

The  carrier placement  routine,= when  Tx is  selected  , scans  the Rx audio  ban= d and selects  the  lowest s/n  spot  frequency in that=   range

So  if you  are  using  a  tra= nsverter =20 (or on frequency  exciter  )  then the TX frequency  i= s  decided by the  audio  drive  frequency  inside= the limits  (red-lines)  for  that  mode/speed
If  using  manual  frequency selection, then  a Tx&nbs= p; frequency  must  be selected, that  will  produce a&= nbsp; carrier/hetrodyne  that  falls  inside the audio pass&= nbsp; band  (red-lines)  defined  by convention as  'di= al  set  usb frequency'

Changing  the  speed&nbs= p; also  requires a  change  of  frequency  to&nbs= p; place the carrier  inside the  correct  filter , automate= d  if  using  audio-drive.

Narrow  IF filters&n= bsp; are  not  desirable  and  reduce the  perfor= mance of the  demodulator  , better  simply  use  SSB  filter

NB :  The  pass  band&nbs= p; edges  are  quite  sharp  , so  ensure  yo= u  are 'inside' and  not  'on the  line'  or = you  may  fail  to  decode  ....... also  t= x / rx  frequency  alignment  may  place you  ou= t  side ....  i

Keying  , recommended  that = ; the  TX be  held in 'tx'  , to  prevent  tx/rx = change over  times  from  altering  the  keying&nb= sp; times .... not  100%  a problem , but  to  enable&n= bsp; decodes the  lower levels  , time +/-  and frequency&nb= sp; +/-  need  to  be as  close to the  generated = values  as possible


GL ..73 -G..


--------------= ------------------------------------
From: "Albert" <w= estberg@xs4all.nl>
Sent: Tuesday, July 10, 2012 2:58 PM
To: &l= t;rsgb_lf_group@blacksheep.org>
Subject: Re:= LF:  OPERA  Question

> Stefan,
>
> Downlo= ad the Opera program. In the waterfall you will see two red lines, put the = cursor on the lines and read the frequency (upper left window of the waterf= all display)  Op4 differs from Op8 etc a frequency within this band is= the input of the USB TX so 477kHz + (a frequency between the red lines). W= hen using CAT control Opera will choose a not occupied freq. in the appropr= iate pass band.
>
> 73, Albert
>
>


--1386533404-1295055915-1341940623=:77325--