Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mc03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 2754338000094; Fri, 6 Jul 2012 07:04:52 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Sn6KK-0005bB-QP for rs_out_1@blacksheep.org; Fri, 06 Jul 2012 12:03:56 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Sn6KK-0005b2-1J for rsgb_lf_group@blacksheep.org; Fri, 06 Jul 2012 12:03:56 +0100 Received: from smtpout2.wanadoo.co.uk ([80.12.242.42] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1Sn6KH-00039c-ON for rsgb_lf_group@blacksheep.org; Fri, 06 Jul 2012 12:03:54 +0100 Received: from AGB ([2.26.17.43]) by mwinf5d17 with ME id Wz3r1j0060vl5qy03z3rv4; Fri, 06 Jul 2012 13:03:52 +0200 Message-ID: <506F5913C8204ACF94C32C7997FF1F01@AGB> From: "Graham" To: References: <7E7DFBB4D102A04DB5ADC88D66628A4A0FAB99CC@ICTS-S-MBX5.luna.kuleuven.be> <1SmrFA-199XcW0@fwd21.t-online.de>, <4FF5EB68.9040507@iup.uni-heidelberg.de> <003401cd5b53$29fea5a0$0401a8c0@xphd97xgq27nyf> In-Reply-To: <003401cd5b53$29fea5a0$0401a8c0@xphd97xgq27nyf> Date: Fri, 6 Jul 2012 12:03:51 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 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: Each to his own, but we would be giving questionable technical advice, if building a LC vfo was put foreword as the preferred path to 500 , Racal's barlow-wadley patent expired round 1970 and was replaced with the digital - phase locked design in the ra1771/2 , with 10 Hz stepping, round the same time ... [...] 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 [80.12.242.42 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: da503d40de1d15ba476c143c8a26a457 Subject: Re: Aw: Re: LF: RE: Analog oscillators Content-Type: multipart/alternative; boundary="----=_NextPart_000_004C_01CD5B6F.684210B0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_30_40,HTML_MESSAGE, HTML_TAG_EXISTS_TBODY,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-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:509549952:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d604b4ff6c6546c90 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_004C_01CD5B6F.684210B0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Each to his own, but we would be giving questionable technical = advice, if building a LC vfo was put foreword as the preferred = path to 500 , Racal's barlow-wadley patent expired round 1970 and = was replaced with the digital - phase locked design in the ra1771/2 = , with 10 Hz stepping, round the same time ... Non of this is relevant now, with the DDS , plenty of good = ex-equipment 5 MHz standards about , that gives a 10:1 clock = over head , all that's needed is a 500 band pass filter and = output amp , If a CW tx is all that's needed , later use the DDS = as the conversion oscillator in a down converter .. OP QSO mode , good question , the phantom of the Opera works in = mysterious ways .. its missing at the moment from the latest = version , keep the old version for later in the year !=20 73 -G.. From: mal hamilton=20 Sent: Friday, July 06, 2012 9:41 AM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: Aw: Re: LF: RE: Analog oscillators Graham Getting One's Oscillator started seems to be the problem at present. = Perhaps a transverter is the answer. What has happened to Opera QSO mode. I do not get any replies, others = seem to favour Beacon mode. G3KEV ----- Original Message -----=20 From: Graham=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, July 05, 2012 9:27 PM Subject: Re: Aw: Re: LF: RE: Analog oscillators I would say the most useful thing to make would be a linear = transmit HF > 500 convertor .. then all modes are possible , = this is not 137 , ultra stable long qrss will not work , due to = the short qsb and varying skip distance, this can be observed in = qso or beacon mode , propagation will fail before the call is = sent ! G..=20 From: Hans-Albrecht Haffa=20 Sent: Thursday, July 05, 2012 9:16 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Aw: Re: LF: RE: Analog oscillators Dear Stefan, building stable oscillators was a topic in the eighties, and it = depeded all on getting stable components. Later developing OMs reported, = that the oscillator for the qrp-TRX was the most difficult and time = consuming part in development. My recomendation: Buy aready built up = DDS-oscillator, available at Funkamateur.de (herre with IQ-sigs) or = ELV-Elektronik. It is stable, shows little noise on LF/MF. Must just = be built into a enclosure. It is a time saving solution. But: DFCW is = not possible, and a keyed frequency divider must be added; I divide by = factor ten with CMOS-ICs. More details on request.=20 55, Hans-Albrecht, DK 8 ND Gesendet: Donnerstag, 05. Juli 2012 um 21:30 Uhr Von: "Stefan Sch=C3=A4fer" An: rsgb_lf_group@blacksheep.org Betreff: Re: LF: RE: Analog oscillators=20 Hello Ha-Jo, Can you pull one of the xtals to cover the whole band? 73, Stefan Am 05.07.2012 20:57, schrieb hajo.brandt.dj1zb@t-online.de: > Dear all, > > the only parts I have bought so far for MF (still beeing engaged in > other developments) are two crystals: 6,5536 MHz and 7,0200 MHz, to = be > mixed with each other. The mixer is another bipolar transistor, and = its > emitter current is being keyed. A final source follower after the > low-pass filter will deliver the output to 50 ohms. > > The same solution I have also used on LF. > > 73 Ha-Jo, DJ1ZB > >=20 > =20 Ihr WEB.DE Postfach immer dabei: die kostenlose WEB.DE Mail App = f=C3=BCr iPhone und Android. =20 https://produkte.web.de/freemail_mobile_startseite/=20 ------=_NextPart_000_004C_01CD5B6F.684210B0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Each to his  own, but we  would  be  = giving =20 questionable technical  advice, if  building  = a =20 LC  vfo  was put foreword  as the  preferred path = to =20 500 , Racal's  barlow-wadley  patent   expired = round =20 1970 and  was  replaced  with  the digital - phase=20 locked  design in the  ra1771/2 , with  = 10 Hz =20 stepping, round  the  same time ...
 
Non  of this is  relevant now, with the  DDS , = plenty=20 of  good   ex-equipment   5  MHz  =20 standards  about , that  gives a  10:1  clock =20 over  head , all  that's needed is a  500  = band =20 pass  filter   and  output  amp , If  = a =20 CW  tx is  all that's  needed , later  use the  = DDS  as the  conversion  oscillator  in a  = down =20 converter ..
 
OP QSO mode  , good  question , the  = phantom of=20 the  Opera works in mysterious   ways  = .. its =20 missing  at the  moment  from the  latest version , = keep=20 the  old  version  for  later  in the  = year !=20
 
73 -G..

From: mal hamilton
Sent: Friday, July 06, 2012 9:41 AM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: Aw: Re: LF: RE: Analog = oscillators

Graham
Getting One's Oscillator started seems to be the = problem=20 at present. Perhaps a transverter is the answer.
What has happened to Opera QSO mode. I do not = get any=20 replies, others seem to favour Beacon mode.
G3KEV
 
----- Original Message -----
From:=20 Graham
Sent: Thursday, July 05, 2012 = 9:27=20 PM
Subject: Re: Aw: Re: LF: RE: = Analog=20 oscillators

I would  say  the most useful thing  to  = make =20 would  be a linear  transmit   HF > = 500  =20 convertor .. then  all  modes are  possible ,  = this =20 is not  137 , ultra stable  long qrss  will  = not =20 work , due to the  short  qsb  and  = varying  =20 skip  distance, this can be observed  in qso  or = beacon =20 mode , propagation  will  fail before the  call  = is =20 sent !
 
G.. 

Sent: Thursday, July 05, 2012 9:16 PM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Aw: Re: LF: RE: Analog = oscillators


Dear Stefan,
building stable oscillators was a topic in the eighties, and it = depeded=20 all on getting stable components. Later developing OMs reported, that = the=20 oscillator for the qrp-TRX was the most difficult and time consuming = part in=20 development. My recomendation: Buy aready built up DDS-oscillator, = available=20 at Funkamateur.de  (herre with IQ-sigs) or ELV-Elektronik.  = It is=20 stable, shows  little noise on LF/MF. Must just be built into a=20 enclosure.  It is a time saving solution. But: DFCW is not = possible, and=20 a keyed frequency divider  must be added; I divide by factor ten = with=20 CMOS-ICs.  More details on request.
55, Hans-Albrecht, DK 8 ND


Gesendet: Donnerstag, = 05. Juli=20 2012 um 21:30 Uhr
Von: "Stefan Sch=C3=A4fer"=20 = <Stefan.Schaefer@iup.uni-heidelberg.de>
An: rsgb_lf_= group@blacksheep.org
Betreff: Re:=20 LF: RE: Analog oscillators
Hello Ha-Jo,

Can you pull one of = the xtals=20 to cover the whole band?

73, Stefan

Am 05.07.2012 20:57, = schrieb=20 hajo.brandt.dj1zb@t-online.de:
> Dear all,
>
> the = only=20 parts I have bought so far for MF (still beeing engaged in
> = other=20 developments) are two crystals: 6,5536 MHz and 7,0200 MHz, to = be
> mixed=20 with each other. The mixer is another bipolar transistor, and = its
>=20 emitter current is being keyed. A final source follower after = the
>=20 low-pass filter will deliver the output to 50 ohms.
>
> = The same=20 solution I have also used on LF.
>
> 73 Ha-Jo,=20 DJ1ZB
>
>
>



  

Ihr=20 WEB.DE Postfach immer dabei: die kostenlose WEB.DE Mail App = f=C3=BCr iPhone=20 und Android.   
https://p= rodukte.web.de/freemail_mobile_startseite/ ------=_NextPart_000_004C_01CD5B6F.684210B0--