Return-Path: Received: from rly-de09.mx.aol.com (rly-de09.mail.aol.com [172.19.170.145]) by air-de01.mail.aol.com (v123.4) with ESMTP id MAILINDE014-5024a09a57335b; Tue, 12 May 2009 12:36:32 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-de09.mx.aol.com (v123.4) with ESMTP id MAILRELAYINDE097-5024a09a57335b; Tue, 12 May 2009 12:36:04 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1M3uwi-0004H5-SS for rs_out_1@blacksheep.org; Tue, 12 May 2009 17:35:12 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1M3uwi-0004Gw-62 for rsgb_lf_group@blacksheep.org; Tue, 12 May 2009 17:35:12 +0100 Received: from smtp5.freeserve.com ([193.252.22.159]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1M3uwg-0005kO-Ij for rsgb_lf_group@blacksheep.org; Tue, 12 May 2009 17:35:12 +0100 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3401.me.freeserve.com (SMTP Server) with ESMTP id 3FFDF1C00084 for ; Tue, 12 May 2009 18:35:05 +0200 (CEST) Received: from AGB (unknown [91.109.12.252]) by mwinf3401.me.freeserve.com (SMTP Server) with SMTP id BD9B81C00081 for ; Tue, 12 May 2009 18:35:04 +0200 (CEST) X-ME-UUID: 20090512163504779.BD9B81C00081@mwinf3401.me.freeserve.com Message-ID: <9FBF89E8DE1A49B7813B9076162C83EE@AGB> From: "Graham" To: References: <406BFF543DA74618A3CA53F315277917@radiorummet> <20090512071115.2CE9B31E702@smtps01.kuleuven.be> In-Reply-To: <20090512071115.2CE9B31E702@smtps01.kuleuven.be> Date: Tue, 12 May 2009 17:34:42 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8064.206 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8064.206 X-Spam-Score: 0.5 (/) X-Spam-Report: autolearn=disabled,HTML_FONT_BIG=0.256,HTML_MESSAGE=0.001,MAILTO_TO_SPAM_ADDR=0.276 Subject: Re: LF: RE: SSB-Beacon Content-Type: multipart/alternative; boundary="----=_NextPart_000_0096_01C9D327.EEEF1140" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.8 required=5.0 tests=HTML_20_30,HTML_FONTCOLOR_BLUE, HTML_FONT_BIG,HTML_MESSAGE,MAILTO_TO_SPAM_ADDR,MISSING_OUTLOOK_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 X-AOL-IP: 193.82.116.20 ------=_NextPart_000_0096_01C9D327.EEEF1140 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Rik, Ok on the fade patters, yes noticed that in the early days , 100 hz made a= big change in signal , one of the reasons for using 25 or 85 hz shift o= n rtty=20 If Gus has something like 'soundforge' could alter the spectrum of the mo= dulation to make up for the losses lh/hf ,=20 to flatten out the pa , that may need some feed back or something similar=20= to reduce changes in phase , easer to beep not speak hihi G ..=20 From: Rik Strobbe=20 Sent: Tuesday, May 12, 2009 8:11 AM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: RE: SSB-Beacon Gus, Dave, Graham, I guess even the Q of the antenna can attenuate the low and/or high tones. In theory with a SSB bandwidth of 2.7kHz and a operating frequency of 505kHz= a Q =3D 180 would cause a 3 dB attenuation at the ends. But from my experience results could even be worse: Although the Q of my ant= enna is only 50 I notice a significant power reduction if I tune the antenna= mid-band (502.5kHz) and QSY to one of the band edges without re-tuning. I a= ssume that the PA is rather "allergic" to a even rather small reactive part=20= of the load. In addition the fading on 500 can indeed be very frequency-selective. During= Graham's 3 mode test I could notice different QSB patterns between the 3 si= gnals (that were only some 100 Hz apart). 73, Rik ON7YD - OR7T At 00:40 12/05/2009, you wrote: I agree ! What is the valve of inductor ? =20 Gus ----- Original Message -----=20 From: Graham=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Tuesday, May 12, 2009 12:33 AM Subject: Re: LF: RE: SSB-Beacon Gus/Dave=20 Might be the Q and BW of the rf path causing a little rounding of the au= dio spectrum , need to boost the lf and hf ..or attenuate the mid range ?=20 G .=20 From: Dave G3WCB=20 Sent: Monday, May 11, 2009 11:08 PM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: RE: SSB-Beacon Gus, Your SSB is about readability 4, signal strength 5 in QSB, with lots of=20= static crashes. It sounds like you might need a bit of audio processing/comp= ression to boost your "talk power". My RX is an ICOM IC-PCR1000 with a tuned pre-amp, and my antenna is my u= sual 500/137kHz "tee", 20m long and 5 metres high. I have saved a couple of *.wav files - do you want me to send them to yo= u? 73, Dave G3WCB IO91RM, nr Windsor, S.E. England -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [ mailto:owner-rsgb_lf_group@= blacksheep.org]On Behalf Of Gus Sent: 11 May 2009 22:18 To: rsgb_lf_group@blacksheep.org Subject: LF: SSB-Beacon Dear LF group, I test a SSB beacon this evening on 505,5 kHz USB. Power is abt 1W ERP and there is also a CW id include.... Reports are wellcome. 73 de Gus SM6BHZ ---------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 8.5.287 / Virus Database: 270.12.24/2107 - Release Date: 05/10/= 09 07:02:00 ----------------------------------------------------------------------------= ---- No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 8.5.287 / Virus Database: 270.12.24/2107 - Release Date: 05/10/09 0= 7:02:00 ------=_NextPart_000_0096_01C9D327.EEEF1140 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Rik,
 
Ok on the  fade patters, yes noticed t= hat in=20 the early  days , 100 hz made a big  change in signal , one of the= =20 reasons  for  using  25 or 85 hz shift on rtty
 
If Gus has something like 'soundforge' = ;=20 could  alter the spectrum of the  modulation to make up for the lo= sses=20 lh/hf ,
 
to flatten out  the pa , that may need= some=20 feed back or  something similar to  reduce changes in phase , ease= r to=20 beep not speak hihi
 
G ..

Sent: Tuesday, May 12, 2009 8:11 AM
Subject: Re: LF: RE: SSB-Beacon

Gus, Dave, Graham,

I guess even the Q of the antenna c= an=20 attenuate the low and/or high tones.
In theory with a SSB bandwidth of 2.= 7kHz=20 and a operating frequency of 505kHz a Q =3D 180 would cause a 3 dB attenuati= on at=20 the ends.
But from my experience results could even be worse: Although th= e Q=20 of my antenna is only 50 I notice a significant power reduction if I tune th= e=20 antenna mid-band (502.5kHz) and QSY to one of the band edges without re-tuni= ng.=20 I assume that the PA is rather "allergic" to a even rather small reactive pa= rt=20 of the load.
In addition the fading on 500 can indeed be very=20 frequency-selective. During Graham's 3 mode test I could notice different QS= B=20 patterns between the 3 signals (that were only some 100 Hz apart).

73= ,=20 Rik  ON7YD - OR7T

At 00:40 12/05/2009, you wrote:
I agre= e ! What=20 is the valve of inductor ?
 
= Gus
----- Original Message -----
From: Graham
To: rsgb_l= f_group@blacksheep.org=20
Sent: Tuesday, May 12, 2009 12:33 AM
Subject: Re: LF: RE: SSB-Beacon

Gus/Dave

 
Might be the Q and BW of the rf path causing a little= =20 rounding of the audio spectrum , need to  boost the lf and hf ..or=20 attenuate the mid range ?

 
G .

From: Dave G3WCB<= /A>=20
Sent: Monday, May 11, 2009 11:08 PM
To: rsgb_l= f_group@blacksheep.org=20
Subject: LF: RE: SSB-Beacon

Gus,

 
Your SSB is about readability 4, sign= al=20 strength 5 in QSB, with lots of static crashes. It sounds like you might= =20 need a bit of audio processing/compression to boost your "talk=20 power".

 
My RX is an ICOM IC-PCR1000 with a tu= ned=20 pre-amp, and my antenna is my usual 500/137kHz "tee", 20m long and 5 met= res=20 high.

 
I have saved a couple of *.wav files=20= - do you=20 want me to send them to you?

 
73, Dave G3WCB IO91RM, nr Windsor, S.= E.=20 England
-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [=20 mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Gus
Sent: 11 May 2009 22:18
To: rsgb_lf_group@blacksheep.org
Subject: LF: SSB-Beacon
Dear LF group,

 
I test a SSB beacon this evening on 505,5 kHz USB.
Power is abt 1W ERP and there is also a CW id include....
Reports are wellcome.

 
73 de Gus SM6BHZ


No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.287 / Virus Database: 270.12.24/2107 - Release Date:=20 05/10/09 07:02:00


No virus found in this incoming message.
Checked by AVG -=20 www.avg.com
Version: 8.5.287 / Virus Database: 270.12.24/2107 - Release=20 Date: 05/10/09 07:02:00
------=_NextPart_000_0096_01C9D327.EEEF1140--