Return-Path: X-Spam-DCC: paranoid 1170; 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=-1.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,HTML_40_50,HTML_MESSAGE 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 t2R9b7Px026206 for ; Fri, 27 Mar 2015 10:37:07 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YbQZn-0007Hb-26 for rs_out_1@blacksheep.org; Fri, 27 Mar 2015 09:29:15 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YbQZm-0007HS-CZ for rsgb_lf_group@blacksheep.org; Fri, 27 Mar 2015 09:29:14 +0000 Received: from rhcavuit02.kulnet.kuleuven.be ([134.58.240.130] helo=cavuit02.kulnet.kuleuven.be) by relay1.thorcom.net with esmtp (Exim 4.85) (envelope-from ) id 1YbQZk-0003gW-C1 for rsgb_lf_group@blacksheep.org; Fri, 27 Mar 2015 09:29:13 +0000 X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-KULeuven-Scanned: Found to be clean X-KULeuven-ID: 1F8AE1282F7.A5235 X-KULeuven-Information: Katholieke Universiteit Leuven Received: from icts-p-smtps-2.cc.kuleuven.be (icts-p-smtps-2e.kulnet.kuleuven.be [134.58.240.34]) by cavuit02.kulnet.kuleuven.be (Postfix) with ESMTP id 1F8AE1282F7 for ; Fri, 27 Mar 2015 10:29:05 +0100 (CET) Received: from ICTS-S-HUB2.luna.kuleuven.be (icts-s-hub2.luna.kuleuven.be [10.112.9.16]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by icts-p-smtps-2.cc.kuleuven.be (Postfix) with ESMTPS id 1D9DC200B0 for ; Fri, 27 Mar 2015 10:29:02 +0100 (CET) Received: from ICTS-S-MBX1.luna.kuleuven.be ([fe80::edaf:341f:90e:f70e]) by ICTS-S-HUB2.luna.kuleuven.be ([fe80::8559:ca7c:e195:e15d%26]) with mapi id 14.03.0224.002; Fri, 27 Mar 2015 10:29:01 +0100 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Thread-Topic: LF: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP... Thread-Index: AQHQaBOXQsZq8/61LEW3P9az8JxDKp0wDKFNgAAENWA= Date: Fri, 27 Mar 2015 09:29:00 +0000 Message-ID: <7E7DFBB4D102A04DB5ADC88D66628A4A234F1A25@ICTS-S-MBX1.luna.kuleuven.be> References: <4698D0522AFD45F896A41F2D16A2D831@AGB> <19EEF7A6DD30462FA6ACC0F015DC9F52@AGB> <5509E3D5.90900@gmail.com> <55102D0C.8040405@gmail.com>,<55148587.3090101@gmail.com> In-Reply-To: <55148587.3090101@gmail.com> Accept-Language: nl-BE, en-GB, en-US Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mimectl: Produced By Microsoft Exchange V14.3.123.2 x-originating-ip: [10.112.13.13] MIME-Version: 1.0 X-HELO-Warning: Remote host 134.58.240.130 (rhcavuit02.kulnet.kuleuven.be) used invalid HELO/EHLO cavuit02.kulnet.kuleuven.be - verification failed X-Scan-Signature: d2a449809c9c1ff1983612d049372878 Subject: RE: LF: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP... Content-Type: multipart/alternative; boundary="_000_7E7DFBB4D102A04DB5ADC88D66628A4A234F1A25ICTSSMBX1lunaku_" 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: 2788 --_000_7E7DFBB4D102A04DB5ADC88D66628A4A234F1A25ICTSSMBX1lunaku_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Stefan, solid signal here, best decode was at -8dB! 73, Rik ON7YD - OR7T ________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org= ] namens DK7FC [73dk7fc@googlemail.com] Verzonden: donderdag 26 maart 2015 23:17 Aan: rsgb_lf_group@blacksheep.org Onderwerp: Re: LF: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP... Hi MF, I'm now running the 7667 at 13.8V supply voltage. The MOSFET driver is easi= ly keyed by the Raspi, directly with its rectangular output. I measured 0.5= W TX power at 50 Ohm. This is what i'm running tonite on 630m. Not a real PA, just the Raspi and this IC in a DIL-8 case. Fascinating!... 73, Stefan Am 23.03.2015 16:11, schrieb DK7FC: Hi MF, I've added a simple ICL7667CPA MOSFET-driver to the GPIO of the Raspberry. = It's power supply is 5V coming from the GPIO itselfe. This leads to a 5V re= ctangular signal with lower output impedance. I've coupled the output match= ing circuit so that the output power is now 50 mW / 17 dBm, i.e. 7 dB more = power then in my previous test. Iamge: https://dl.dropboxusercontent.com/u/19882028/MF/17dBm%20RPI%20WSPR.= jpg The beacon is running now on 475.685 kHz. 73, Stefan/DK7FC Am 18.03.2015 21:45, schrieb DK7FC: Hi MF, Today i've got i 3rd Raspberry Pi. I quickly installed the WSPR softaware a= nd 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 re= ctangular 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 ho= w 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 a= t 5 V. --_000_7E7DFBB4D102A04DB5ADC88D66628A4A234F1A25ICTSSMBX1lunaku_ Content-Type: text/html; charset="iso-8859-1" Content-ID: <79E7725CEDEF904DAB0A4278B320D9C0@luna.kuleuven.be> Content-Transfer-Encoding: quoted-printable

Hi Stefan,

 

solid signal here= , best decode was at= -8dB!

 

73, Rik ON7YD - OR7T<= /a>

 

Van: owner-rsgb_lf_group@blacksheep.org [o= wner-rsgb_lf_group@blacksheep.org] namens DK7FC [73dk7fc@googlemail.com] Verzonden: donderdag 26 maart 2015 23:17
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: TXing WSPR on 630m on a Raspberry Pi, Stefan in Q= RP...

Hi MF,

I'm now running the 7667 at 13.8V supply voltage. The MOSFET driver is easi= ly keyed by the Raspi, directly with its rectangular output. I measured 0.5 W TX power at 50 Ohm. This is what i'm running tonite on = 630m.
Not a real PA, just the Raspi and this IC in a DIL-8 case. Fascinating!...<= br>
73, Stefan


Am 23.03.2015 16:11, schrieb DK7FC:
Hi MF,

I've added a simple ICL7667CPA MOSFET-driver to the GPIO of the Raspberry. = It's power supply is 5V coming from the GPIO itselfe. This leads to a 5V re= ctangular signal with lower output impedance. I've coupled the output match= ing circuit so that the output power is now 50 mW / 17 dBm, i.e. 7 dB more power then in my previous test.
Iamge:  https://dl.dropboxusercontent.com/u/19882028/MF/17dBm%20RPI%20WSPR.jpg<= br>
The beacon is running now on 475.685 kHz.

73, Stefan/DK7FC


Am 18.03.2015 21:45, schrieb DK7FC:
Hi MF,

Today i've got i 3rd Raspberry Pi. I quickly installed the WSPR softaware a= nd 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 re= ctangular 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%20WSP= R%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 ho= w 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 a= t 5 V.
--_000_7E7DFBB4D102A04DB5ADC88D66628A4A234F1A25ICTSSMBX1lunaku_--