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 t2RCAJUa026510 for ; Fri, 27 Mar 2015 13:10:20 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YbT2n-0007nx-Ix for rs_out_1@blacksheep.org; Fri, 27 Mar 2015 12:07:21 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YbT2n-0007no-3T for rsgb_lf_group@blacksheep.org; Fri, 27 Mar 2015 12:07:21 +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 1YbT2k-0004GQ-KR for rsgb_lf_group@blacksheep.org; Fri, 27 Mar 2015 12:07:19 +0000 Received: from F6CNIToshiba (unknown [83.153.241.20]) by smtp2-g21.free.fr (Postfix) with SMTP id F091A4B0246 for ; Fri, 27 Mar 2015 13:05:36 +0100 (CET) Message-ID: From: =?UTF-8?B?R3V5w6kgQW5kcsOp?= To: References: In-Reply-To: Date: Fri, 27 Mar 2015 13:07:17 +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: 80010ec899558c7eb633db282cbaa403 Subject: Re: LF: RE: Re: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP... Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01D0688E.F3CD7F00" 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: 2792 Ce message est composi et au format MIME. ------=_NextPart_000_000C_01D0688E.F3CD7F00 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable HI Dave. Your antenna is not very high but is doing nice ! Congrats. I hope to copy you soon from your IO80 location. Have a lot of fun on MF. 73 Andy. From: Dave G3WCB. Sent: Friday, March 27, 2015 12:53 PM To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Re: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP...= Hi, Andy. Thank you for the report. I'm running about 15W RF into a 5m high, 20m long= "Tee" with two top wires. My antenna current is about 0,8A. After Easter I will be QSY-ing to IO80 locator, and I hope to be running WS= PR from there on 630m. The antenna situation in IO80 is not so good, so I w= ill have to experiment with some "Stealth" antennas for MF! 73, Dave G3WCB IO91RM > IO80DI -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blac= ksheep.org]On Behalf Of Guy=C3=A9 Andr=C3=A9 Sent: 27 March 2015 10:26 To: RSGB LF Group Subject: LF: Re: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP... Hello Stefan. Ok about your interesting test with 0.5 TX Power. Sorry, I cannot copy yo= u on day time, due to high carrier QRM just on your transmitting QRG. On th= e way now, the G3WCB signal is good around 0 dB S/N, at about the same dist= ance as you. I am now transmitting 2 or 3 times to see the difference in ON7YD and OR7= T reports. You know that I am always transmitting QRP on MF. Maximum power is 3 Watt= s output TX. Now I have exactly the same power as your : 0.5 Watt. On night= this 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 watt P= AR, 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.o= rg] 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 ea= sily keyed by the Raspi, directly with its rectangular output. I measured 0= =2E5 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!..= =2E 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 Raspber= ry. 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%20W= SPR.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 softa= ware and since a few minutes i am transmitting WSPR-2 on 630m, my usual fre= quency 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 trans= former (FT50-77) as well as a simple pi-filter, because it is a Raspberry p= i! ;-) See: https://dl.dropboxusercontent.com/u/19882028/MF/Raspberry%20Pi%2= 0B%2B%20WSPR%20TX.jpg I measured an output power of about 10 mW at 50 Ohm. It is now connec= ted to my MF antenna and transmits in a 100% duty cycle. I still have to le= arn 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 chal= lenge! :-) 73, Stefan/DK7FC PS: The signal is so weak that my RX antenna frontend is not overload= ed, 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 run= ning 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. www.avast.com --- 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_000C_01D0688E.F3CD7F00 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
HI Dave.
 
Your antenna is not very high but is doing nice ! Congrats.
 
I hope to copy you soon from your IO80 location. Have a lot of fun on = MF.
 
73 Andy.
Hi, Andy.
 
Thank you for the report. I'm running about 15W RF into a 5m high, 20m long "Tee"= with two top wires. My antenna current is about 0,8A.
 
After Easter I will be QSY-ing to IO80 locator, and I hope to be running WSPR fro= m there on 630m. The antenna situation in IO80 is not so good, so I will have= to experiment with some "Stealth" antennas for MF!
 
73, Dave G3WCB IO91RM > IO80DI
 
-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Guy=C3=A9 = Andr=C3=A9
Sent: 27 March 2015 10:26
To: RSGB LF Group
Subject: LF: Re: TXing WSPR on 630m on a Raspberry Pi, St= efan in QRP...

Hello Stefan.
 
Ok about your interesting test with 0.5 TX Power. Sorry, I cannot co= py you on day time, due to high carrier QRM just on your transmitting QRG. O= n the way now, the G3WCB signal is good around 0 dB S/N, at about the same dist= ance as you.
 
I am now transmitting 2 or 3 times to see the difference in ON7YD an= d 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 this winter I was mostly using below 0.1 Watt.
 
My large winter antenna (Inv L) is dismounted and I am using a singl= e 25 meters vertical tube without top hat capacitance. The effeciency is aroun= d =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 w= att 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= MOSFET 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 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 com= ing from the GPIO itselfe. This leads to a 5V rectangular signal with lower= output impedance. I've coupled the output matching circuit so that the = output power is now 50 mW / 17 dBm, i.e. 7 dB more power then in my pre= vious test.
Iamge:  https://dl.dropboxusercontent.com/u/19882028/MF/17dBm%2= 0RPI%20WSPR.jpg

The beacon is running now on 475.685 kHz.

73, Stefan/DK7FC

<= BR>Am 18.03.2015 21:45, schrieb DK7FC:
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/Raspb= erry%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 lea= rn how to reduce it but this will not take long.

With 10 mW TX po= wer 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 some= one 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 fron= tend 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 inten= d to use an BS170 running at 5 V.


3D"Avast

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




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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