Return-Path: X-Spam-DCC: paranoid 1170; Body=1 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=-2.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,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 t2RAVD2p026314 for ; Fri, 27 Mar 2015 11:31:13 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YbRT4-0007Qq-Kp for rs_out_1@blacksheep.org; Fri, 27 Mar 2015 10:26:22 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YbRT4-0007Qh-6v for rsgb_lf_group@blacksheep.org; Fri, 27 Mar 2015 10:26:22 +0000 Received: from smtp2-g21.free.fr ([212.27.42.2]) by relay1.thorcom.net with esmtps (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.85) (envelope-from ) id 1YbRT1-0003tK-JJ for rsgb_lf_group@blacksheep.org; Fri, 27 Mar 2015 10:26:21 +0000 Received: from F6CNIToshiba (unknown [83.153.241.20]) by smtp2-g21.free.fr (Postfix) with SMTP id 8C2234B0143 for ; Fri, 27 Mar 2015 11:24:37 +0100 (CET) Message-ID: <520562D5C7694FF69C20E595E00B793D@F6CNIToshiba> From: =?utf-8?B?R3V5w6kgQW5kcsOp?= To: "RSGB LF Group" References: <4698D0522AFD45F896A41F2D16A2D831@AGB> <19EEF7A6DD30462FA6ACC0F015DC9F52@AGB> <5509E3D5.90900@gmail.com> <55102D0C.8040405@gmail.com>,<55148587.3090101@gmail.com> <7E7DFBB4D102A04DB5ADC88D66628A4A234F1A25@ICTS-S-MBX1.luna.kuleuven.be> In-Reply-To: <7E7DFBB4D102A04DB5ADC88D66628A4A234F1A25@ICTS-S-MBX1.luna.kuleuven.be> Date: Fri, 27 Mar 2015 11:26:17 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 16.4.3528.331 X-MimeOLE: Produced By Microsoft MimeOLE V16.4.3528.331 X-Antivirus: avast! (VPS 150327-0, 27/03/2015), Outbound message X-Antivirus-Status: Clean X-Scan-Signature: b2d5972cffc09bc55071138bfa4f6e53 Subject: LF: Re: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP... Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01D06880.D74832C0" 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: 2789 Ce message est composi et au format MIME. ------=_NextPart_000_0008_01D06880.D74832C0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hello Stefan. Ok about your interesting test with 0.5 TX Power. Sorry, I cannot copy you = on day time, due to high carrier QRM just on your transmitting QRG. On the = way now, the G3WCB signal is good around 0 dB S/N, at about the same distan= ce as you. I am now transmitting 2 or 3 times to see the difference in ON7YD and OR7T = reports. You know that I am always transmitting QRP on MF. Maximum power is 3 Watts = output TX. Now I have exactly the same power as your : 0.5 Watt. On night t= his winter I was mostly using below 0.1 Watt. My large winter antenna (Inv L) is dismounted and I am using a single 25 me= ters vertical tube without top hat capacitance. The effeciency is around = =E2=80=93 20 dB, so the PAR (apparent radiated power) is 5 milliwatt. If you want to have real QRPP test, you can test WSPR at 500 micro watt PAR= , and still have lucky reports up to 1500 km. Best 73. Andy F6CNI =E2=80=93 JN19QB From: Rik Strobbe Sent: Friday, March 27, 2015 10:29 AM To: rsgb_lf_group@blacksheep.org Subject: RE: LF: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP... 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= =2E It's power supply is 5V coming from the GPIO itselfe. This leads to a 5= V rectangular signal with lower output impedance. I've coupled the output m= atching circuit so that the output power is now 50 mW / 17 dBm, i.e. 7 dB m= ore power then in my previous test. Iamge: https://dl.dropboxusercontent.com/u/19882028/MF/17dBm%20RPI%20WSP= R.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 softawa= re and since a few minutes i am transmitting WSPR-2 on 630m, my usual frequ= ency 475.685 kHz. I'm directly using the GPIO output pin, without an amp stage behind! Th= e rectangular 3.3V output voltage is passing a cap and an isolation transfo= rmer (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 connecte= d to my MF antenna and transmits in a 100% duty cycle. I still have to lear= n 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 J= N06ht 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 challe= nge! :-) 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 runni= ng at 5 V. --- L'absence de virus dans ce courrier =C3=A9lectronique a =C3=A9t=C3=A9 v=C3= =A9rifi=C3=A9e par le logiciel antivirus Avast. http://www.avast.com ------=_NextPart_000_0008_01D06880.D74832C0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Hello Stefan.
 
Ok about your interesting test with 0.5 TX Power. Sorry, I cannot copy= you on day time, due to high carrier QRM just on your transmitting QRG. On the = way now, the G3WCB signal is good around 0 dB S/N, at about the same distance a= s you.
 
I am now transmitting 2 or 3 times to see the difference in ON7YD and = OR7T reports.
 
You know that I am always transmitting QRP on MF. Maximum power is 3 W= atts output TX. Now I have exactly the same power as your : 0.5 Watt. On night t= his winter I was mostly using below 0.1 Watt.
 
My large winter antenna (Inv L) is dismounted and I am using a single = 25 meters vertical tube without top hat capacitance. The effeciency is around = =E2=80=93 20 dB, so the PAR (apparent radiated power) is 5 milliwatt.
 
If you want to have real QRPP test, you can test WSPR at 500 micro wat= t PAR, and still have lucky reports up to 1500 km.
 
Best 73. Andy F6CNI =E2=80=93 JN19QB
 

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 M= OSFET driver is easily 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 t= onite 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 D= K7FC:
Hi MF,

I've added a simple ICL7667CPA MOSFET-driver to the GPIO of the Raspberry. It's power supply is 5V comin= g from the GPIO itselfe. This leads to a 5V rectangular signal with lower o= utput impedance. I've coupled the output matching circuit so that the output po= wer 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%20R= PI%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 P= i. 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/Raspber= ry%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 man= aged 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 someon= e 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 fronte= nd is not overloaded, so at that power level i can transmit and receive to th= e same time :-)
PPS: A small amp stage will follow soon, i intend to u= se an BS170 running at 5 V.


3D"Avast

L'absence de virus dans ce courrier =C3=A9lectronique a =C3=A9t=C3=A9 v= =C3=A9rifi=C3=A9e par le logiciel antivirus Avast.
www.avast.com


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