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=-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 t2RBvGB2026473 for ; Fri, 27 Mar 2015 12:57:16 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YbSpJ-0007h2-N8 for rs_out_1@blacksheep.org; Fri, 27 Mar 2015 11:53:25 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YbSpI-0007gt-Rk for rsgb_lf_group@blacksheep.org; Fri, 27 Mar 2015 11:53:24 +0000 Received: from rgout01.bt.lon5.cpcloud.co.uk ([65.20.0.178]) by relay1.thorcom.net with esmtp (Exim 4.85) (envelope-from ) id 1YbSpG-0004Cg-FS for rsgb_lf_group@blacksheep.org; Fri, 27 Mar 2015 11:53:23 +0000 X-DKIM-Result: Domain=btopenworld.com Result=Signature OK X-OWM-Source-IP: 86.167.197.181(GB) X-OWM-Env-Sender: ganymede444@btinternet.com X-CTCH-RefID: str=0001.0A090205.551544B1.0032,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-Junkmail-Premium-Raw: score=29/50,refid=2.7.2:2015.3.24.102118:17:29.421,ip=86.167.197.181,rules=__HAS_FROM, __TO_MALFORMED_2, __TO_NO_NAME, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __HAS_MSGID, __SANE_MSGID, __MIME_VERSION, __CT, __CTYPE_MULTIPART_ALT, __CTYPE_HAS_BOUNDARY, __CTYPE_MULTIPART, __HAS_X_PRIORITY, __HAS_MSMAIL_PRI, __HAS_X_MAILER, __USER_AGENT_MS_GENERIC, __IN_REP_TO, __ANY_URI, LINK_TO_IMAGE, __FRAUD_BODY_WEBMAIL, __URI_NO_PATH, __HIGHBITS, __C230066_P5, __STOCK_PHRASE_7, __SUBJ_ALPHA_NEGATE, SUPERLONG_LINE, __HTML_FONT_BLUE, __HAS_HTML, HTML_NO_HTTP, BODY_SIZE_10000_PLUS, __MIME_HTML, __TAG_EXISTS_HTML, RDNS_GENERIC_POOLED, __URI_NS, SXL_IP_DYNAMIC[181.197.167.86.fur], HTML_50_70, RDNS_SUSP_GENERIC, RDNS_SUSP, __FRAUD_WEBMAIL X-CTCH-Spam: Unknown Received: from taurids (86.167.197.181) by rgout01.bt.lon5.cpcloud.co.uk (8.6.122.06) (authenticated as ganymede444) id 5508763C013D6554 for rsgb_lf_group@blacksheep.org; Fri, 27 Mar 2015 11:53:20 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btopenworld.com; s=btcpcloud; t=1427457202; bh=bh83cDCw8m1+NKGyJqCordDYxbzkEx/ctssn+cuGLp4=; h=From:To:Subject:Date:Message-ID:MIME-Version:X-Mailer:In-Reply-To; b=MHpnEgnTaQPxkMsLNOtMJavEkvNabxHnYxk9+lBO7MtZEaogi1yBjbBmn8qKWVib2ODfvWn5CSCZelsfJcPVJx1fa6WH4uMw8JwC/OZ3NUqoRXxBoxTWu6anhe0eKT2l2KOyF+mZwaKhzc8CIiQFOxzSeKhZvJ6q5GfL/FFJMNM= From: "Dave G3WCB." To: Date: Fri, 27 Mar 2015 11:53:20 -0000 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-Reply-To: <520562D5C7694FF69C20E595E00B793D@F6CNIToshiba> Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Scan-Signature: 5888f019f789bb7da964f45b5f85ee04 Subject: LF: RE: Re: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP... Content-Type: multipart/alternative; boundary="----=_NextPart_000_000E_01D06884.9EDDEB60" 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: 2791 This is a multi-part message in MIME format. ------=_NextPart_000_000E_01D06884.9EDDEB60 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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 from 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, Stefan in = QRP... 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 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 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.=20 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=20 Sent: Friday, March 27, 2015 10:29 AM To: rsgb_lf_group@blacksheep.org=20 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,=20 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:=20 Hi MF,=20 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 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 previous test. Iamge: = https://dl.dropboxusercontent.com/u/19882028/MF/17dBm%20RPI%20WSPR.jpg The beacon is running now on 475.685 kHz.=20 73, Stefan/DK7FC Am 18.03.2015 21:45, schrieb DK7FC:=20 Hi MF,=20 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.=20 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%20W= SPR%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=20 2015-03-18 20:32 DK7FC 0.475684 -21 0 JN49ik 0.01 = DH5RAE JN68qv 345 98 =20 2015-03-18 20:12 DK7FC 0.475685 -24 0 JN49ik 0.01 = F1AFJ JN06ht 667 247 =20 2015-03-18 20:06 DK7FC 0.475683 -27 0 JN49ik 0.01 = DL1DBC JO41bi 217 349 =20 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. -------------------------------------------------------------------------= ----- L'absence de virus dans ce courrier =C3=A9lectronique a = =C3=A9t=C3=A9 v=C3=A9rifi=C3=A9e par le logiciel antivirus Avast.=20 www.avast.com=20 =20 ------=_NextPart_000_000E_01D06884.9EDDEB60 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Hi,=20 Andy.
 
Thank=20 you for the report. I'm running about 15W RF into a 5m high, 20m long = "Tee" with=20 two top wires. My antenna current is about 0,8A.
 
After=20 Easter I will be QSY-ing to IO80 locator, and I hope to be running WSPR = from=20 there on 630m. The antenna situation in IO80 is not so good, so I will = have to=20 experiment with some "Stealth" antennas for MF!
 
73,=20 Dave G3WCB IO91RM > IO80DI
 
-----Original Message-----
From:=20 owner-rsgb_lf_group@blacksheep.org=20 [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of = Guy=C3=A9=20 Andr=C3=A9
Sent: 27 March 2015 10:26
To: RSGB LF=20 Group
Subject: LF: Re: TXing WSPR on 630m on a Raspberry Pi, = Stefan=20 in QRP...

Hello Stefan.
 
Ok about your interesting test with 0.5 TX Power. Sorry, I cannot = copy=20 you on day time, due to high carrier QRM just on your transmitting = QRG. On the=20 way now, the G3WCB signal is good around 0 dB S/N, at about the same = distance=20 as you.
 
I am now transmitting 2 or 3 times to see the difference in ON7YD = and=20 OR7T reports.
 
You know that I am always transmitting QRP on MF. Maximum power = is 3=20 Watts output TX. Now I have exactly the same power as your : 0.5 Watt. = On=20 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=20 meters vertical tube without top hat capacitance. The effeciency is = around =E2=80=93=20 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=20 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
Subject: RE: LF: TXing WSPR on 630m on a Raspberry Pi, = Stefan in=20 QRP...
 

Hi Stefan,

 

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

 

73, Rik ON7YD - OR7T

 

Van: owner-rsgb_lf_group@blacksheep.org=20 [owner-rsgb_lf_group@blacksheep.org] namens DK7FC=20 [73dk7fc@googlemail.com]
Verzonden: donderdag 26 maart 2015=20 23:17
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: = Re: LF:=20 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=20 MOSFET driver is easily keyed by the Raspi, directly with its = rectangular=20 output. I measured 0.5 W TX power at 50 Ohm. This is = what i'm=20 running tonite on 630m.
Not a real PA, just the Raspi and this IC = in a=20 DIL-8 case. Fascinating!...

73, Stefan


Am 23.03.2015 = 16:11,=20 schrieb DK7FC:=20
Hi MF,

I've added a simple = ICL7667CPA=20 MOSFET-driver to the GPIO of the Raspberry. It's power supply is 5V = coming=20 from the GPIO itselfe. This leads to a 5V rectangular signal with = lower=20 output impedance. I've coupled the output matching circuit so that = the=20 output power is now 50 mW / 17 dBm, i.e. 7 dB more power then in my = previous=20 test.
Iamge:  https://dl.dropboxusercontent.com/u/19882028/MF/17dBm%20R= PI%20WSPR.jpg

The=20 beacon is running now on 475.685 kHz.

73, = Stefan/DK7FC


Am=20 18.03.2015 21:45, schrieb DK7FC:=20
Hi MF,

Today i've got i 3rd = Raspberry Pi.=20 I quickly installed the WSPR softaware and since a few minutes i = am=20 transmitting WSPR-2 on 630m, my usual frequency 475.685 kHz. =

I'm=20 directly using the GPIO output pin, without an amp stage behind! = The=20 rectangular 3.3V output voltage is passing a cap and an isolation=20 transformer (FT50-77) as well as a simple pi-filter, because it is = a=20 Raspberry pi! ;-)

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

I=20 measured an output power of about 10 mW at 50 Ohm. It is now = connected to=20 my MF antenna and transmits in a 100% duty cycle. I still have to = learn=20 how to reduce it but this will not take long.

With 10 mW TX = power i=20 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=20 good ears to get a decode from me? :-) It is a challenge! = :-)

73,=20 Stefan/DK7FC

PS: The signal is so weak that my RX antenna = frontend=20 is not overloaded, so at that power level i can transmit and = receive to=20 the same time :-)
PPS: A small amp stage will follow soon, i = intend to=20 use an BS170 running at 5=20 V.


3D"Avast L'absence=20 de virus dans ce courrier =C3=A9lectronique a =C3=A9t=C3=A9 = v=C3=A9rifi=C3=A9e par le logiciel=20 antivirus Avast.
www.avast.com=20


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