Return-Path: Received: from mtain-de05.r1000.mx.aol.com (mtain-de05.r1000.mx.aol.com [172.29.64.205]) by air-df02.mail.aol.com (v128.1) with ESMTP id MAILINDF022-5ee74bbd1c853e5; Wed, 07 Apr 2010 20:00:05 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-de05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 4BE6A3800011A; Wed, 7 Apr 2010 20:00:03 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Nzf95-0000po-JD for rs_out_1@blacksheep.org; Thu, 08 Apr 2010 00:58:55 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Nzf94-0000pf-Ho for rsgb_lf_group@blacksheep.org; Thu, 08 Apr 2010 00:58:54 +0100 Received: from web28108.mail.ukl.yahoo.com ([217.146.182.128]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1Nzf94-0007kv-7S for rsgb_lf_group@blacksheep.org; Thu, 08 Apr 2010 00:58:54 +0100 Received: (qmail 12490 invoked by uid 60001); 7 Apr 2010 23:58:48 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1270684728; bh=WN74t2MOUkWGRaHz/U7FTA9NvgVZFTVSxvknssNLWLA=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=CpCg10bZvUV1Rx5XuCeO18mipF0ITTowDW8Ir+7QqzI8q31UenN1jTiaxLk6/mIPXMS2c1cDCrSxW+LybW6F+z74cswSamf5fNVAp5H7oDw6/lCw+zW7qRFEYS4Xhs/KM2EXW1nEidf8bMZqcYasgDFr7IFpYpVyExzYUn01/KI= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=4CG9XspD18QkzwFeYrZ93nPZcF1aMtnnyX8u6eTeX1tN/y40leohbW6+oLYMOjuzOAIgWJKhz2npCy8BXc7CDIGZHsaoOje6L8pGvy8qc+q74yatu9c7rDBYIX+4rpXE4XbsMKFYKO0X/w2o67xTc81Q8NgzegNqmaC48660Hmo=; Message-ID: <375926.10896.qm@web28108.mail.ukl.yahoo.com> X-YMail-OSG: PwS4m6QVM1lbJNf1omPYIyGPHcF5h_tSY7Joa6G1PMCmnEP UItd2AESSGiAr3p7kb49m.NUI1QPxbCR0NgE4Hq9q41t5GsEO41f1fSK2mQn 2NNA3uIFkrFKl3eIbV.hsQz.l1WOTv_JFxaJiZrcrvCDf_Mtf3g1lUVrT0LG SMZNLxUF5Ht8NKQlQs3T94vBALc55kkRS4oh.ZgGeRYnjiX8xvdIaOYhi1VZ Fq6QL9sLlYYZuakHi4EjpjwqKJmlJb.FzfYH6xGdt_au1wjZAOMcVIQCQltZ 3REgOddqtcl7.8ZDcbGFeeQ-- Received: from [86.147.176.209] by web28108.mail.ukl.yahoo.com via HTTP; Wed, 07 Apr 2010 16:58:48 PDT X-Mailer: YahooMailClassic/10.0.8 YahooMailWebService/0.8.100.260964 Date: Wed, 7 Apr 2010 16:58:48 -0700 (PDT) From: M0FMT To: rsgb_lf_group@blacksheep.org In-Reply-To: <000001cad6aa$750e8270$0202a8c0@laptopcore2> MIME-Version: 1.0 DomainKey-Status: good (testing) Subject: RE: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner Content-Type: multipart/alternative; boundary="0-1446832077-1270684728=:10896" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.4 required=5.0 tests=HTML_50_60, HTML_FONTCOLOR_UNKNOWN,HTML_MESSAGE,HTML_TAG_EXISTS_TBODY 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-AUTHENTICATION: mail_rly_antispam_dkim-m248.1 ; domain : yahoo.co.uk DKIM : pass x-aol-sid: 3039ac1d40cd4bbd1c830ead X-AOL-IP: 193.82.116.20 --0-1446832077-1270684728=:10896 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi again Eddie and group =C2=A0 Thanks for the follow up Eddie. To be honest I think your solution is more= in line with the way Chris XIZ is thinking (think he has gone to bed now)= if I can presume to know what he is looking for. It interests me=C2=A0I= must say. I would like to chat off list if that's OK may be tomorrow? And= I am sure Chris would like to as well. I don't have PIC programming tools at all and don't have any experience wr= iting PIC code either so=C2=A0I need help. The other point is that I have been under the misapprehension that WSPR ne= eded to be linearly amplified to prevent IM products in the output but may= be=C2=A0I am wrong?=C2=A0 Anyway thanks for responding. 73 es GL petefmt --- On Thu, 8/4/10, g3zjo wrote: From: g3zjo Subject: RE: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner To: rsgb_lf_group@blacksheep.org Date: Thursday, 8 April, 2010, 0:31 Hi Pete =C2=A0 That=E2=80=99s right my info is coded on the chip and not written to be ea= sily (externally) recoded, hence, since I can=E2=80=99t represent 0.0002W= using WSPR I am lazy and I stick with my arbitrary 0.05W. SM6LKM and others have produced WSPR code for a PIC that can have the data= changed via a serial port. Regarding producing programmed PICs, providing= the user data coded in is no problem, however, I write my code for the pa= rticular Xtal used for the timing for each project so each is unique. The SM6LKM / (G4JNT ) method uses GPS / MSF external timing and so makes= the code transportable to other projects, however for me that is one step= further away from KISS. =C2=A0 73 Eddie G3ZJO =C2=A0 -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@black= sheep.org] On Behalf Of M0FMT Sent: 08 April 2010 00:04 To: rsgb_lf_group@blacksheep.org Subject: RE: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner =C2=A0 Hi Eddie I have mentioned your method of using the 74HC84 chip with two xtals in an= earlier Mail. I think I understand that way of generating the WSPR signal= but the "magic" is in the PIC program. Have you ever considered offering= programed PIC because I would like to try your method. I am guessing the= PIC just carries your call, loc and power and is not alterable with out= reprogramming the chip? Have you written your rig up anywhere? I saw the 6m experiment article but= as far as I could see it was a means of eliminating the PC and soundcard= the output being a 1500c/s tone 4 FSK phase shited. Anyway a very interesting practical solution. 73 es GL petefmt --- On Wed, 7/4/10, g3zjo wrote: From: g3zjo Subject: RE: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner To: rsgb_lf_group@blacksheep.org Date: Wednesday, 7 April, 2010, 23:33 Hi Chris =C2=A0 Just a bit more for you to mull over.=20 =C2=A0 I don=E2=80=99t think anyone has mentioned the MP3 approach where a 2min= WSPR data stream is recorded at audio and used to modulate the TX with su= itable start stop timing. =C2=A0 Then there is my audio WSPR system which I call the XORgan, this generates= WSPR at audio at a very stable base frequency derived from the difference= between 2 identical xtals, one pulled 1,500Hz the other modulated, using= an XOR chip. =C2=A0 Then there is Gene Marcus follow on of that idea with the tones generated= directly by an audio oscillator, its frequency being varied by WSPR code. Both of these methods need the WSPR to be coded in a PIC. =C2=A0 As I understand your application, with VCO facility there is no need for= the audio mixing you mention, just use the PIC to modulate the VCO.=20 My WSPR on 503.810kHz uses this method, no GPS clocking just some accurate= timing in the programming which has been running now for 2 years, recentl= y I have had to attack the capacitance values due to Xtal ageing, it had= gone outside the range of the trimmer. The timing thus needed correction= within 24 hours, today, now I have done the mod, I did a reset after 4 da= ys whether it needed it or not. =C2=A0 73 =C2=A0 Eddie G3ZJO =C2=A0 -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@black= sheep.org] On Behalf Of Chris Osborn Sent: 07 April 2010 22:41 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner =C2=A0 Many thanks for all the contributions and suggestions. I have been reading them and trying to understand but I am no 'boffin'. Basically I have a 'decent' PC and appear to be receiving WSPR ok. My rig is home built with a DC receiver and a simple CW type TX with VCO= facility. I am not at home with PIC's or programming and was hoping someone would co= me up with an analogue solution. I know I need to do more 'reading up' but was trying the lazy-man's approa= ch. My initial thoughts were that the PC is giving out a 1500 Hz tone + / - 5= Hz. This is used to generate USB signals from an SSB TX (?) I was hoping to mix these tones with a stable frequency of 1400 Hz (say)= ending up with 100 Hz + / - 5 Hz - thence to an F-V converter - gain / level adjuste= d and thence to the TX VCO input. Ready and awaiting the brickbats. 73 Chris G3XIZ =C2=A0 From: M0FMT To: rsgb_lf_group@blacksheep.org Sent: Wed, 7 April, 2010 21:41:02 Subject: RE: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner Hi Group=C2=A0 =C2=A0 I think we have been here before but this is my contribution:- =C2=A0 Do the whole thing with software WSPR - VAC - SDR software - Hardware Tayl= oe detector in reverse using a Multiplex chip. This may not be the simplest technique taking the Applications involved i.= e. writing the software. but it already exists so it is just a matter of= integrating them to make a system. The Tayloe detector exists as a kit by= Softrock. You do need however to=C2=A0amplify linearly from the detector= output up to final o/p power level.=20 =C2=A0 I use the reverse for WSPR RX on MF and LF. And have played with the TX si= de on 30m at about 1Watt O/P. =C2=A0 I can demonstrate this method if you are interested Chris, assuming=C2=A0w= atching paint drying (srri=C2=A0I mean WSPR) is the new attraction...hee.= =C2=A0 =C2=A0 73 es GL petefmt t@yahoo.co.uk> wrote: From: M0FMT Subject: RE: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner To: rsgb_lf_group@blacksheep.org Date: Wednesday, 7 April, 2010, 20:55 Please see below reply from Joe Taylor on this very subject September last= year, This is the guy who actually wrote this application (you might say= from the Horse Mouth)=C2=A0and he said :- =C2=A0 On Mon, 7/9/09, Joe Taylor wrote: From: Joe Taylor Subject: Re: WSPR To: "M0FMT" Date: Monday, 7 September, 2009, 1:47 PM Hi Peter, > Does your Software have a data output that gives a hi lo i.e 0,1 on the= serial port other than the PTT Hi Lo? No. > If the software doesn't have this facility why not? Because there is no standard, nor even anything remotely approaching one,= that would permit hard-keying an oscillator to produce continuous-phase= 4-FSK with offset 1.465 Hz between tones. The WSPR program, as distributed, is essentially a sound card mode. With that said, it should be noted that a number of people have built spec= ial-purpose WSPR transmitters that implement the necessary 4-tone FSK capa= bility in hardware.=C2=A0 Their keying is typically controlled from a=C2= =A0 microprocessor, with the encoded message (sequence of tones) stored in= ROM. =C2=A0=C2=A0=C2=A0 -- 73, Joe, K1JT 73 es GL petefmt --- On Wed, 7/4/10, Rik Strobbe wrote: From: Rik Strobbe Subject: RE: LF: WSPR without an SSB TRX ? To: "rsgb_lf_group@blacksheep.org" Date: Wednesday, 7 April, 2010, 14:23 hello Chris, Jim, group, an alternative to a transverted would be a divider, let's say from 5MHz (f= rom a HF tranceiver) to 500kHz. That would limit the hardware to some resistors an a single CMOS or TTL IC= . I have written a small apllication that generates the appropriate WSPR aud= io signal based on the input frequency, output frequency and divider ratio= . It worked fine for some local tests, but due to lack of I did no real "DX= tests" so. But if anyone wants to try this route I will be happy to send the software= . 73, Rik=C2=A0 ON7YD - OR7T ________________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.or= g] namens James Moritz [james.moritz@btopenworld.com] Verzonden: woensdag 7 april 2010 15:09 Aan: rsgb_lf_group@blacksheep.org Onderwerp: Re: LF: WSPR without an SSB TRX ? Dear Chris, Andy, LF Group, What Andy suggests is fine for generating a WSPR signal, but receiving WSP= R via the PIC might be a bit more difficult... But also at http://www.g4jnt.com/LFUpconv.pdf is Andy's simple phasing up-converter, which could be used to convert a PC audio output to 500kHz= and be used in place of the VCO in your TX. Trawling through the Forum topics on the WSPRnet.org website (you might ha= ve to sign up to see all the material) will reveal many designs for homebrew= HF WSPR beacons that could mostly be adapted to 500k. Cheers, Jim Moritz 73 de M0BMU =C2=A0 =C2=A0 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.800 / Virus Database: 271.1.1/2796 - Release Date: 04/07/10= 07:32:00 =C2=A0 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.800 / Virus Database: 271.1.1/2796 - Release Date: 04/07/10= 07:32:00 =20 --0-1446832077-1270684728=:10896 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi again Eddie and group
 
Thanks for the follow up Eddie. To be honest I think your solution is= more in line with the way Chris XIZ is thinking (think he has gone to bed= now) if I can presume to know what he is looking for. It interests me&nbs= p;I must say. I would like to chat off list if that's OK may be tomorrow?= And I am sure Chris would like to as well.
I don't have PIC programming tools at all and don't have any experien= ce writing PIC code either so I need help.
The other point is that I have been under the misapprehension that WS= PR needed to be linearly amplified to prevent IM products in the output bu= t may be I am wrong? 
Anyway thanks for responding.

73 es GL petefmt

--- On Thu, 8/4/10, g3zjo= <g3zjo@npton.plus.com> wrote:

From: g3zjo <g3zjo@npton.plus.com>
Su= bject: RE: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner
To: rs= gb_lf_group@blacksheep.org
Date: Thursday, 8 April, 2010, 0:31

Hi Pete

 =

That=E2=80=99s right= my info is coded on the chip and not written to be easily (externally) re= coded, hence, since I can=E2=80=99t represent 0.0002W using WSPR I am lazy= and I stick with my arbitrary 0.05W.

SM6LKM and others ha= ve produced WSPR code for a PIC that can have the data changed via a seria= l port. Regarding producing programmed PICs, providing the user data coded= in is no problem, however, I write my code for the particular Xtal used= for the timing for each project so each is unique.

The SM6LKM / (G4JNT= ) method uses GPS / MSF external timing and so makes the code transportab= le to other projects, however for me that is one step further away from KI= SS.

 =

73

Eddie G3ZJO

 =

----= -Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@black= sheep.org] On Behalf Of M0= FMT
Sent: 08 April 2010= 00:04
To: rsgb_lf_grou= p@blacksheep.org
Subject: RE: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner=

 

Hi Eddie

I have mentioned your method of using the 74HC84 chip= with two xtals in an earlier Mail. I think I understand that way of gener= ating the WSPR signal but the "magic" is in the PIC program. Have you ever= considered offering programed PIC because I would like to try your method= . I am guessing the PIC just carries your call, loc and power and is not= alterable with out reprogramming the chip?

Have you written your rig up anywhere? I saw the 6m= experiment article but as far as I could see it was a means of eliminatin= g the PC and soundcard the output being a 1500c/s tone 4 FSK phase shited.=

Anyway a very interesting practical solution.

= 73 es GL petefmt

--- On Wed,= 7/4/10, g3zjo <g3zjo@npton.plus.= com> wrote:


From: g3zjo <g3zjo= @npton.plus.com>
Subject: RE: LF: WSPR without an SSB TRX ? FRM Joe= Taylor NPwinner
To: rsgb_lf_group@blacksheep.org
Date: Wednesday,= 7 April, 2010, 23:33

Hi Chris

 =

Just a bit more for= you to mull over.

 =

I don=E2=80=99t thin= k anyone has mentioned the MP3 approach where a 2min WSPR data stream is= recorded at audio and used to modulate the TX with suitable start stop ti= ming.

 =

Then there is my aud= io WSPR system which I call the XORgan, this generates WSPR at audio at a= very stable base frequency derived from the difference between 2 identica= l xtals, one pulled 1,500Hz the other modulated, using an XOR chip.=

 =

Then there is Gene= Marcus follow on of that idea with the tones generated directly by an aud= io oscillator, its frequency being varied by WSPR code.

Both of these method= s need the WSPR to be coded in a PIC.

 =

As I understand your= application, with VCO facility there is no need for the audio mixing you= mention, just use the PIC to modulate the VCO.

My WSPR on 503.810kH= z uses this method, no GPS clocking just some accurate timing in the progr= amming which has been running now for 2 years, recently I have had to atta= ck the capacitance values due to Xtal ageing, it had gone outside the rang= e of the trimmer. The timing thus needed correction within 24 hours, today= , now I have done the mod, I did a reset after 4 days whether it needed it= or not.

 =

73

 =

Eddie G3ZJO

 =

----= -Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@black= sheep.org] On Behalf Of Ch= ris Osborn
Sent: 07 Apr= il 2010 22:41
To: rsgb_= lf_group@blacksheep.org
Subject: Re: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner=

 

Many thanks for all the con= tributions and suggestions.
I have been reading them and trying to unde= rstand but I am no 'boffin'.

Basically I have a 'decent' PC and app= ear to be receiving WSPR ok.
My rig is home built with a DC rece= iver and a simple CW type TX with VCO facility.

I am not at home wi= th PIC's or programming and was hoping someone would come
up with an an= alogue solution.
I know I need to do more 'reading up' but was trying= the lazy-man's approach.

My initial thoughts were that the PC is= giving out a 1500 Hz tone + / - 5 Hz.
This is used to generate USB sig= nals from an SSB TX (?)
I was hoping to mix these tones with a stable= frequency of 1400 Hz (say) ending up
with 100 Hz + / - 5 Hz - thence= to an F-V converter - gain / level adjusted and thence
to the TX VCO= input.

Ready and awaiting the brickbats.

73 Chris G3XIZ

 

<= /DIV>

<= FONT size=3D2 face=3DTahoma>From: M0FMT <m0fmt@= yahoo.co.uk>
To: rsg= b_lf_group@blacksheep.org
Sent: Wed, 7 April, 2010 21:41:02
Subject: RE: LF: WSPR without an SSB TRX ? FRM Joe Taylor NP= winner

Hi Group 

 

I think we have been here before but this= is my contribution:-

 

Do the whole thing with software WSPR - VAC= - SDR software - Hardware Tayloe detector in reverse using a Multiplex ch= ip.

This may not be the simplest technique taki= ng the Applications involved i.e. writing the software. but it already exi= sts so it is just a matter of integrating them to make a system. The Taylo= e detector exists as a kit by Softrock. You do need however to amplif= y linearly from the detector output up to final o/p power level.

 

I use the reverse for WSPR RX on MF and LF.= And have played with the TX side on 30m at about 1Watt O/P.=

 

I can demonstrate this method if you are in= terested Chris, assuming watching paint drying (srri I mean WSPR= ) is the new attraction...hee. 

 

73 es GL petefmt



t@yahoo.co.uk><= /I> wrote:


From: M0F= MT <m0fmt@yahoo.co.uk>
Subject: RE: LF: WSPR without an SSB TRX= ? FRM Joe Taylor NPwinner
To: rsgb_lf_group@blacksheep.org
Date: We= dnesday, 7 April, 2010, 20:55

Please see below reply from Joe Taylor on this very= subject September last year, This is the guy who actually wrote this appl= ication (you might say from the Horse Mouth) and he said :-

 

On Mon, 7/9/09, Joe Taylor <joe@Princeton.EDU> wrote:

From: Joe= Taylor <joe@Princeton.EDU>
Subject: Re: WSPR
To: "M0FMT" <= m0fmt@yahoo.co.uk>
Date: Monday, 7 September, 2009, 1:47 PM

Hi Peter,

> Does your Software have a data= output that gives a hi lo i.e 0,1 on the serial port other than the PTT= Hi Lo?

No.

> If the software doesn't have this facility= why not?

Because there is no standard, nor even anything remotely= approaching one, that would permit hard-keying an oscillator to produce= continuous-phase 4-FSK with offset 1.465 Hz between tones.

The WSP= R program, as distributed, is essentially a sound card mode.

With= that said, it should be noted that a number of people have built special-= purpose WSPR transmitters that implement the necessary 4-tone FSK capabili= ty in hardware.  Their keying is typically controlled from a  mi= croprocessor, with the encoded message (sequence of tones) stored in ROM.<= BR>    -- 73, Joe, K1JT


73 es GL petefmt



--- On W= ed, 7/4/10, Rik Strobbe <Rik.Stro= bbe@fys.kuleuven.be> wrote:


From: Rik Strobbe <= ;Rik.Strobbe@fys.kuleuven.be>
Subject: RE: LF: WSPR without an SSB= TRX ?
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.= org>
Date: Wednesday, 7 April, 2010, 14:23

hello Chris, Jim, group,

an alternative to a= transverted would be a divider, let's say from 5MHz (from a HF tranceiver= ) to 500kHz.
That would limit the hardware to some resistors an a singl= e CMOS or TTL IC.
I have written a small apllication that generates the= appropriate WSPR audio signal based on the input frequency, output freque= ncy and divider ratio.
It worked fine for some local tests, but due to= lack of I did no real "DX tests" so.
But if anyone wants to try this= route I will be happy to send the software.

73, Rik  ON7YD -= OR7T

________________________________________
Van: owner-rsgb_lf_group@blacksheep.org= [owner-rsgb_lf_group@blacksheep.org] namens James Moritz [james.moritz@btop= enworld.com]
Verzonden: woensdag 7 april 2010 15:= 09
Aan: rsgb_lf_group@blacksheep.org=
Onderwerp: Re: LF: WSPR without an SSB TRX ?

Dear Chris= , Andy, LF Group,

What Andy suggests is fine for generating a WSPR= signal, but receiving WSPR
via the PIC might be a bit more difficult..= .

But also at http://www.g4jnt.com/LFUpconv.pdf is Andy's simp= le phasing
up-converter, which could be used to convert a PC audio outp= ut to 500kHz and
be used in place of the VCO in your TX.

Trawlin= g through the Forum topics on the WSPRnet.org website (you might have
t= o sign up to see all the material) will reveal many designs for homebrew= HF
WSPR beacons that could mostly be adapted to 500k.

Cheers,= Jim Moritz
73 de M0BMU

 

 

No virus found in this incoming message.
Che= cked by AVG - www.avg.com
Version: 9.0.800 / Virus Database: 271.1.1/27= 96 - Release Date: 04/07/10 07:32:00

 

No virus found in this incoming messa= ge.
Checked by AVG - www.avg.com
Version: 9.0.800 / Virus Database:= 271.1.1/2796 - Release Date: 04/07/10 07:32:00<= /DIV>


=20 --0-1446832077-1270684728=:10896--