Return-Path: Received: (qmail 15052 invoked from network); 22 Jan 2004 19:59:07 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by mailstore with SMTP; 22 Jan 2004 19:59:07 -0000 Received: (qmail 83414 invoked from network); 22 Jan 2004 19:59:07 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 22 Jan 2004 19:59:04 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1Ajkym-000LNz-Gy for dave@picks.force9.co.uk; Thu, 22 Jan 2004 19:59:04 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ajkyd-0007pd-RP for rs_out@blacksheep.org; Thu, 22 Jan 2004 19:58:55 +0000 Received: from [62.58.50.89] (helo=postbode02.zonnet.nl) by post.thorcom.com with esmtp (Exim 4.14) id 1Ajkyc-0007pJ-Lm for rsgb_lf_group@blacksheep.org; Thu, 22 Jan 2004 19:58:54 +0000 Received: (qmail 2317 invoked by uid 10); 22 Jan 2004 19:58:23 -0000 Received: (vexira-qq 02252-E75033C6 invoked from network) 22 Jan 2004 20:58:22 +0100 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.190.188]) (envelope-sender ) by postbode02.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 22 Jan 2004 19:58:22 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <002501c3e121$12a54fe0$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org References: <000c01c3e02e$600a21a0$01eafc3e@l8p8y6> <001501c3e058$ba617980$2102000a@ibm> Date: Thu, 22 Jan 2004 20:44:44 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Antivirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.23.0.2; VDF: 6.23.0.29; host: postbode02.zonnet.nl) Subject: LF: 136kHz project cancelled Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.7 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_30_40,HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Content-transfer-encoding: 8bit

Hello all,

Sorry to say but for the moment I decided to stop my building

activeties for the 136kHz transmitter.

Right from the start I faced only problems in getting things

working, and I just do not have the time to spend days on

testing, trying doing things over and over and in another way etc.

To give you some examples from problems I ran into:

No suitable X-tals to build VXO 's or something with an divider, so I decided

to build an VFO on 1.37MHz followed by an 4017 to divide by 10.

VFO worked perfect but the 10-diveder just wouldn't work!!!!

I spend hours and hours to get it running, tried several different IC's

(I expected speed problems etc) all with no result.........

1.37MHz in ......NOTHING out................

It was a sinple circuit : pin 8,13,15 to ground, VCC on 16, 1.37MHz on pin 14,

and output at pin 12...... so stupid simple, that it really is amazing that things are

not working.

Well, I decided to try my luck with an 4060 IC..........modified the VFO, now around 2192kHz,

divided by 16 to get 137kHz.

Well, that does work ,so, so......and with a large amount of harmonics....2,3,4,5, etc times 137kHz

and all very strong well into the 5MHz range..........

I think I need a lot of filtering to get rid of this.................

So, with things already in this stadium getting so unfortunate, I think it's better to stop

before I start loosing components like FET's or what ever, because I can't imagine that

that will work without problems either..........

Once again, sorry to say, but can't efford myself to continue this way.

I do know that this is the real experimental stuff, and I have done a lot in the past,

but for now not so enthiousiastic about this project anymore.

Maybe later I'll pick things up again.

Meanwhile I will try to keep informed about the 136kHz scene here in the list; maybe doing some

listening...........

73 for now!

Dick (an unfortunate 136-TX builder..........)