Return-Path: X-Spam-DCC: paranoid 1102; 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=0.0 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_HOTMAIL_RCVD,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 t2NGd0nI009185 for ; Mon, 23 Mar 2015 17:39:00 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ya5KL-0000l3-F8 for rs_out_1@blacksheep.org; Mon, 23 Mar 2015 16:35:45 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Ya5KL-0000ku-3R for rsgb_lf_group@blacksheep.org; Mon, 23 Mar 2015 16:35:45 +0000 Received: from blu004-omc1s5.hotmail.com ([65.55.116.16]) by relay1.thorcom.net with esmtps (TLSv1.2:AES256-SHA256:256) (Exim 4.85) (envelope-from ) id 1Ya5KI-00080a-Qv for rsgb_lf_group@blacksheep.org; Mon, 23 Mar 2015 16:35:43 +0000 Received: from BLU177-W45 ([65.55.116.9]) by BLU004-OMC1S5.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.22751); Mon, 23 Mar 2015 09:35:40 -0700 X-TMN: [ABLX84/cwsydTk+TO/OxctNruhcjgbCB] X-Originating-Email: [hellozerohellozero@hotmail.com] Message-ID: From: Laurence KL7 L To: "rsgb_lf_group@blacksheep.org" Date: Mon, 23 Mar 2015 08:35:39 -0800 Importance: Normal In-Reply-To: <55102D0C.8040405@gmail.com> References: <4698D0522AFD45F896A41F2D16A2D831@AGB>,,<19EEF7A6DD30462FA6ACC0F015DC9F52@AGB>,<5509E3D5.90900@gmail.com>,<55102D0C.8040405@gmail.com> MIME-Version: 1.0 X-OriginalArrivalTime: 23 Mar 2015 16:35:40.0454 (UTC) FILETIME=[66451C60:01D06587] X-Scan-Signature: c3a0d80882a29f438f57a981c7a65fcd Content-Type: multipart/alternative; boundary="_c971b81c-0778-4215-b4dd-72ef8759c786_" Subject: RE: LF: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRPPPP... 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: 2770 --_c971b81c-0778-4215-b4dd-72ef8759c786_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =0A= =0A= =0A= Nice Stefan - are the two back to back diodes just before the LPF to catch = noise spikes back towards the 7667 or another purpose? =20 Laurence KL7 LSnowless Alaska =20 From: 73dk7fc@googlemail.com Date: Mon=2C 23 Mar 2015 16:11:08 +0100 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: TXing WSPR on 630m on a Raspberry Pi=2C Stefan in QRPPPP..= . =0A= =0A= =0A= =0A= =0A= =0A= Hi MF=2C=20 =0A= =0A= I've added a simple ICL7667CPA MOSFET-driver to the GPIO of the=0A= Raspberry. It's power supply is 5V coming from the GPIO itselfe. This=0A= leads to a 5V rectangular signal with lower output impedance. I've=0A= coupled the output matching circuit so that the output power is now 50=0A= mW / 17 dBm=2C i.e. 7 dB more power then in my previous test. =0A= Iamge: =0A= https://dl.dropboxusercontent.com/u/19882028/MF/17dBm%20RPI%20WSPR.jpg =0A= =0A= The beacon is running now on 475.685 kHz.=20 =0A= =0A= 73=2C Stefan/DK7FC =0A= =0A= =0A= Am 18.03.2015 21:45=2C schrieb DK7FC:=0A= =0A= =0A= Hi MF=2C=20 =0A= =20 =0A= Today i've got i 3rd Raspberry Pi. I quickly installed the WSPR=0A= softaware and since a few minutes i am transmitting WSPR-2 on 630m=2C my=0A= usual frequency 475.685 kHz.=20 =0A= =20 =0A= I'm directly using the GPIO output pin=2C without an amp stage behind!=0A= The rectangular 3.3V output voltage is passing a cap and an isolation=0A= transformer (FT50-77) as well as a simple pi-filter=2C because it is a=0A= Raspberry pi! =3B-) =0A= =20 =0A= See:=0A= https://dl.dropboxusercontent.com/u/19882028/MF/Raspberry%20Pi%20B%2B%20W= SPR%20TX.jpg =0A= =20 =0A= I measured an output power of about 10 mW at 50 Ohm. It is now=0A= connected to my MF antenna and transmits in a 100% duty cycle. I still=0A= have to learn how to reduce it but this will not take long. =0A= =20 =0A= With 10 mW TX power i managed decodes by 3 stations now. =0A= 3 spots: =0A= =0A= =0A= =0A= Timestamp=0A= Call=0A= MHz=0A= SNR=0A= Drift=0A= Grid=0A= Pwr=0A= Reporter=0A= RGrid=0A= km=0A= az=0A= =0A= =0A= 2015-03-18 20:32 =0A= DK7FC =0A= 0.475684 =0A= -21 =0A= 0 =0A= JN49ik =0A= 0.01 =0A= DH5RAE =0A= JN68qv =0A= 345 =0A= 98 =0A= =0A= =0A= 2015-03-18 20:12 =0A= DK7FC =0A= 0.475685 =0A= -24 =0A= 0 =0A= JN49ik =0A= 0.01 =0A= F1AFJ =0A= JN06ht =0A= 667 =0A= 247 =0A= =0A= =0A= 2015-03-18 20:06 =0A= DK7FC =0A= 0.475683 =0A= -27 =0A= 0 =0A= JN49ik =0A= 0.01 =0A= DL1DBC =0A= JO41bi =0A= 217 =0A= 349 =0A= =0A= =0A= =0A= =20 =0A= =20 =0A= Does someone have good ears to get a decode from me? :-) It is a=0A= challenge! :-) =0A= =20 =0A= 73=2C Stefan/DK7FC =0A= =20 =0A= PS: The signal is so weak that my RX antenna frontend is not=0A= overloaded=2C so at that power level i can transmit and receive to the=0A= same time :-) =0A= PPS: A small amp stage will follow soon=2C i intend to use an BS170=0A= running at 5 V. =0A= =0A= = --_c971b81c-0778-4215-b4dd-72ef8759c786_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
=0A= =0A= =0A=
Nice Stefan - are the two back to back diodes just before = the LPF to catch noise spikes =3Bback towards the 7667 or another purpo= se?
 =3B
Laurence KL7 L
Snowless Alaska
=  =3B
From: 73dk7fc@go= oglemail.com
Date: Mon=2C 23 Mar 2015 16:11:08 +0100
To: rsgb_lf_grou= p@blacksheep.org
Subject: Re: LF: TXing WSPR on 630m on a Raspberry Pi= =2C Stefan in QRPPPP...

=0A= =0A= =0A= =0A= =0A= =0A= Hi MF=2C
=0A=
=0A= I've added a simple ICL7667CPA MOSFET-driver to the GPIO of the=0A= Raspberry. It's power supply is 5V coming from the GPIO itselfe. This=0A= leads to a 5V rectangular signal with lower output impedance. I've=0A= coupled the output matching circuit so that the output power is now 50=0A= mW / 17 dBm=2C i.e. 7 dB more power then in my previous test.
=0A= Iamge: =3B=0A= https://dl.dropboxusercontent.com/u/19882028/MF/17dBm%20RPI%20= WSPR.jpg
=0A=
=0A= The beacon is running now on 475.685 kHz.
=0A=
=0A= 73=2C Stefan/DK7FC
=0A=
=0A=
=0A= Am 18.03.2015 21:45=2C schrieb DK7FC:=0A=
=0A= =0A= Hi MF=2C
=0A=
=0A= Today i've got i 3rd Raspberry Pi. I quickly installed the WSPR=0A= softaware and since a few minutes i am transmitting WSPR-2 on 630m=2C my=0A= usual frequency 475.685 kHz.
=0A=
=0A= I'm directly using the GPIO output pin=2C without an amp stage behind!=0A= The rectangular 3.3V output voltage is passing a cap and an isolation=0A= transformer (FT50-77) as well as a simple pi-filter=2C because it is a=0A= Raspberry pi! =3B-)
=0A=
=0A= See:=0A= https://dl.dropboxusercontent.com/u/19882028/= MF/Raspberry%20Pi%20B%2B%20WSPR%20TX.jpg
=0A=
=0A= I measured an output power of about 10 mW at 50 Ohm. It is now=0A= connected to my MF antenna and transmits in a 100% duty cycle. I still=0A= have to learn how to reduce it but this will not take long.
=0A=
=0A= With 10 mW TX power i managed decodes by 3 stations now.
=0A= 3 spots:
=0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A= =0A=
TimestampCallMHzSNRDriftGridPwrReporterRGridkmaz
 =3B2015-03-18 20:32 =3B =3BDK7FC =3B =3B0.475684 =3B =3B-21 =3B =3B0 =3B =3BJN49ik =3B =3B0.01 =3B =3BDH5RAE =3B =3BJN68qv =3B =3B345 =3B =3B98 =3B
 =3B2015-03-18 20:12 =3B =3BDK7FC =3B =3B0.475685 =3B =3B-24 =3B =3B0 =3B =3BJN49ik =3B =3B0.01 =3B =3BF1AFJ =3B =3BJN06ht =3B =3B667 =3B =3B247 =3B
 =3B2015-03-18 20:06 =3B =3BDK7FC =3B =3B0.475683 =3B =3B-27 =3B =3B0 =3B =3BJN49ik =3B =3B0.01 =3B =3BDL1DBC =3B =3BJO41bi =3B =3B217 =3B =3B349 =3B
=0A=
=0A=
=0A= Does someone have good ears to get a decode from me? :-) It is a=0A= challenge! :-)
=0A=
=0A= 73=2C Stefan/DK7FC
=0A=
=0A= PS: The signal is so weak that my RX antenna frontend is not=0A= overloaded=2C so at that power level i can transmit and receive to the=0A= same time :-)
=0A= PPS: A small amp stage will follow soon=2C i intend to use an BS170=0A= running at 5 V.
=0A=
=0A=
= --_c971b81c-0778-4215-b4dd-72ef8759c786_--