Return-Path: X-Spam-DCC: paranoid 1356; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,RATWARE_GECKO_BUILD autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id t2IKqME4018025 for ; Wed, 18 Mar 2015 21:52:22 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YYKq4-0003Ku-0l for rs_out_1@blacksheep.org; Wed, 18 Mar 2015 20:45:16 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YYKq3-0003Kl-BE for rsgb_lf_group@blacksheep.org; Wed, 18 Mar 2015 20:45:15 +0000 Received: from mail-wi0-f176.google.com ([209.85.212.176]) by relay1.thorcom.net with esmtps (TLSv1.2:AES128-GCM-SHA256:128) (Exim 4.85) (envelope-from <73dk7fc@googlemail.com>) id 1YYKq1-0007cg-Ga for rsgb_lf_group@blacksheep.org; Wed, 18 Mar 2015 20:45:14 +0000 Received: by wifj2 with SMTP id j2so50425991wif.1 for ; Wed, 18 Mar 2015 13:45:12 -0700 (PDT) X-DKIM-Result: Domain=googlemail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20120113; h=from:message-id:date:user-agent:mime-version:to:subject:references :in-reply-to:content-type; bh=IKdScFVysfKBNj6CCSdstJqPuENWI0IxCCNNwCiXkJQ=; b=wiB95jOnl/aMHilOyTeEWChgatgQvKrBNwgOOV12U1R5Di36FhlllCYQX7iG2qE8KB sf/ldCU9/XJlcSt1I54MU4iBtyOWRZnRCTnsGHsHn5on7imx7gr1wWgWHScdCf02DqQg EZLGbMKSpy2YI/e6nu4R+Q8oC2niN0dd7xshdfmarH/il1UEtmn7Q1M8rFUEt0nzNkEZ ddtsTQUV/Zy7NLpr0W12qNs+ZytfLB9bFBF9gnxZ9MaC1lSl+jg56gBKmhjMVdoqokYm 0DkRMhqfneXRH/6it0QCPTXnqzs3rcwgFeFt7vX4LMXO3tNOg/aFNkioQYoRGl08Ie0L evDQ== X-Received: by 10.180.206.98 with SMTP id ln2mr10158954wic.94.1426711512128; Wed, 18 Mar 2015 13:45:12 -0700 (PDT) Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de. [129.206.22.206]) by mx.google.com with ESMTPSA id 17sm25976863wjt.45.2015.03.18.13.45.10 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 18 Mar 2015 13:45:11 -0700 (PDT) From: DK7FC <73dk7fc@googlemail.com> X-Google-Original-From: DK7FC <73dk7fc@gmail.com> Message-ID: <5509E3D5.90900@gmail.com> Date: Wed, 18 Mar 2015 21:45:09 +0100 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4698D0522AFD45F896A41F2D16A2D831@AGB> <19EEF7A6DD30462FA6ACC0F015DC9F52@AGB> In-Reply-To: <19EEF7A6DD30462FA6ACC0F015DC9F52@AGB> X-Scan-Signature: f1284eec928b6c66f973fc41cf683e42 Subject: LF: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRPPPP... Content-Type: multipart/alternative; boundary="------------000905040607030105060106" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 2708 This is a multi-part message in MIME format. --------------000905040607030105060106 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi MF, Today i've got i 3rd Raspberry Pi. I quickly installed the WSPR softaware and since a few minutes i am transmitting WSPR-2 on 630m, my usual frequency 475.685 kHz. I'm directly using the GPIO output pin, without an amp stage behind! The rectangular 3.3V output voltage is passing a cap and an isolation transformer (FT50-77) as well as a simple pi-filter, because it is a Raspberry pi! ;-) See: https://dl.dropboxusercontent.com/u/19882028/MF/Raspberry%20Pi%20B%2B%20WSPR%20TX.jpg I measured an output power of about 10 mW at 50 Ohm. It is now connected to my MF antenna and transmits in a 100% duty cycle. I still have to learn how to reduce it but this will not take long. With 10 mW TX power i managed decodes by 3 stations now. 3 spots: Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az 2015-03-18 20:32 DK7FC 0.475684 -21 0 JN49ik 0.01 DH5RAE JN68qv 345 98 2015-03-18 20:12 DK7FC 0.475685 -24 0 JN49ik 0.01 F1AFJ JN06ht 667 247 2015-03-18 20:06 DK7FC 0.475683 -27 0 JN49ik 0.01 DL1DBC JO41bi 217 349 Does someone have good ears to get a decode from me? :-) It is a challenge! :-) 73, Stefan/DK7FC PS: The signal is so weak that my RX antenna frontend is not overloaded, so at that power level i can transmit and receive to the same time :-) PPS: A small amp stage will follow soon, i intend to use an BS170 running at 5 V. --------------000905040607030105060106 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi MF,

Today i've got i 3rd Raspberry Pi. I quickly installed the WSPR softaware and since a few minutes i am transmitting WSPR-2 on 630m, my usual frequency 475.685 kHz.

I'm directly using the GPIO output pin, without an amp stage behind! The rectangular 3.3V output voltage is passing a cap and an isolation transformer (FT50-77) as well as a simple pi-filter, because it is a Raspberry pi! ;-)

See: https://dl.dropboxusercontent.com/u/19882028/MF/Raspberry%20Pi%20B%2B%20WSPR%20TX.jpg

I measured an output power of about 10 mW at 50 Ohm. It is now connected to my MF antenna and transmits in a 100% duty cycle. I still have to learn how to reduce it but this will not take long.

With 10 mW TX power i managed decodes by 3 stations now.

3 spots:

Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az
 2015-03-18 20:32   DK7FC   0.475684   -21   0   JN49ik   0.01   DH5RAE   JN68qv   345   98 
 2015-03-18 20:12   DK7FC   0.475685   -24   0   JN49ik   0.01   F1AFJ   JN06ht   667   247 
 2015-03-18 20:06   DK7FC   0.475683   -27   0   JN49ik   0.01   DL1DBC   JO41bi   217   349 


Does someone have good ears to get a decode from me? :-) It is a challenge! :-)

73, Stefan/DK7FC

PS: The signal is so weak that my RX antenna frontend is not overloaded, so at that power level i can transmit and receive to the same time :-)
PPS: A small amp stage will follow soon, i intend to use an BS170 running at 5 V.
--------------000905040607030105060106--