Delivered-To: daveyxm@virginmedia.com Received: by 10.50.237.98 with SMTP id vb2csp8656igc; Sun, 23 Feb 2014 11:01:38 -0800 (PST) X-Received: by 10.194.89.33 with SMTP id bl1mr15655699wjb.64.1393182098313; Sun, 23 Feb 2014 11:01:38 -0800 (PST) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id nd19si3724437wic.31.2014.02.23.11.01.37 for ; Sun, 23 Feb 2014 11:01:38 -0800 (PST) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1WHe88-00028A-2I for rs_out_1@blacksheep.org; Sun, 23 Feb 2014 18:50:24 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1WHe87-000281-HO for rsgb_lf_group@blacksheep.org; Sun, 23 Feb 2014 18:50:23 +0000 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1WHe85-0001wa-Fx for rsgb_lf_group@blacksheep.org; Sun, 23 Feb 2014 18:50:22 +0000 Received: from crusoe.iup.uni-heidelberg.de (crusoe.iup.uni-heidelberg.de [129.206.22.248]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id s1NIoJkj022132 for ; Sun, 23 Feb 2014 19:50:20 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by crusoe.iup.uni-heidelberg.de (Postfix) with ESMTP id C8DC1E0DBF for ; Sun, 23 Feb 2014 19:50:19 +0100 (CET) Message-ID: <530A42EB.3070609@iup.uni-heidelberg.de> Date: Sun, 23 Feb 2014 19:50:19 +0100 From: schaefer User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <530A3920.9020308@iup.uni-heidelberg.de> <08C9605D129D408EA502F9E9CECE649A@F6CNI> In-Reply-To: <08C9605D129D408EA502F9E9CECE649A@F6CNI> X-Spam-Score: -1.2 (-) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hello Andy, MF, Here is an image of what i have so far: https://dl.dropboxusercontent.com/u/19882028/MF/20140223_193945.jpg I'm just playing arround, without having a schematic or calculations. But now i'm starting to add some elements to improve the efficiency. [...] Content analysis details: (-1.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [129.206.100.212 listed in list.dnswl.org] -0.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_REMOTE_IMAGE Message contains an external image X-Scan-Signature: 0c28add2673aaa1c8f62f1695e18ff8b Subject: Re: LF: WSPR MF QRPPPPP by DK7FC ?? Content-Type: multipart/alternative; boundary="------------030207060106010200000003" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,HTML_MESSAGE, HTML_TAG_EXISTS_TBODY autolearn=no version=2.63 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 This is a multi-part message in MIME format. --------------030207060106010200000003 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay.uni-heidelberg.de id s1NIoJkj022132 Hello Andy, MF, Here is an image of what i have so far:=20 https://dl.dropboxusercontent.com/u/19882028/MF/20140223_193945.jpg I'm just playing arround, without having a schematic or calculations.=20 But now i'm starting to add some elements to improve the efficiency. Maybe tomorrow i will transmit with a LEMON. Maybe some JT9 or WSQ QSO=20 can be made with that ;-) 73, Stefan Am 23.02.2014 19:25, schrieb Andr=E9 Guy=E9: > Ok Stefan, > here hard to copy you because your TX frequency is not clear at this=20 > moment. > Please, what is the current intensity at the base of the antenna ? > Andy. > *From:* schaefer > *Sent:* Sunday, February 23, 2014 7:08 PM > *To:* rsgb_lf_group@blacksheep.org > *Subject:* LF: WSPR MF QRPPPPP by DK7FC ?? > Hello all, > > You all know me as a QRP station :-) But today i want to run even less=20 > power! > > While running in the sunny afternoon i got the idea to build a very=20 > small and weak PA. After some playing arround it came to me that it=20 > will be a class-E PA. The power supply should be a lemon battery, i.e.=20 > a homemade galvanic element, maybe 2 in series! > > The desired RF power is arround 20...40 mW, at 2 V DC. And i'm using a=20 > BS170=20 > =20 > MOSFET for that PA. The biggest part will be the BNC jack :-) > > So far i'm testing with an empty 9V battery and a 100 Ohm resistor in=20 > series. I measured 2V and 35mA. But the PA is not yet aligned for=20 > class E mode. Probably the efficiency is less than 50% in the moment. > > Anyway several stations seem to copy me :-) > > More reporting stations are apprechiated, if you like to test your=20 > sensitive RX :-) > > 73, Stefan/DK7FC > > PS: Later, i want to try to rectify some RF coming from AFN to my=20 > antenna. It this is fed to a 10F gold cap and WSPR-2 in 33% ratio is=20 > sent, maybe i can run that PA from the energy of AFN :-) > > > > -----------------------------------------------------------------------= - > =09 > > Ce courrier =E9lectronique ne contient aucun virus ou logiciel=20 > malveillant parce que la protection Antivirus avast!=20 > est active. > > --------------030207060106010200000003 Content-Type: text/html; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay.uni-heidelberg.de id s1NIoJkj022132 Hello Andy, MF,

Here is an image of what i have so far: https://dl.dropboxusercontent.com/= u/19882028/MF/20140223_193945.jpg
I'm just playing arround, without having a schematic or calculations. But now i'm starting to add some elements to improve the efficiency.

Maybe tomorrow i will transmit with a LEMON. Maybe some JT9 or WSQ QSO can be made with that ;-)

73, Stefan



Am 23.02.2014 19:25, schrieb Andr=E9 Guy=E9:
Ok Stefan,
=A0
here hard to copy you because your TX frequency is not clear at this moment.
=A0
Please, what is the current intensity at the base of the antenna ?
=A0
Andy.
=A0
From: schaefer
Sent: Sunday, February 23, 2014 7:08 PM
Subject: LF: WSPR MF QRPPPPP by DK7FC ??
=A0
Hello all,

You all know me as a QRP station :-) But today i want to run even less power!

While running in the sunny afternoon i got the idea to build a very small and weak PA. After some playing arround it came to me that it will be a class-E PA. The power supply should be a lemon battery, i.e. a homemade galvanic element, maybe 2 in series!

The desired RF power is arround 20...40 mW, at 2 V DC. And i'm using a BS170 MOSFET for that PA. The biggest part will be the BNC jack :-)

So far i'm testing with an empty 9V battery and a 100 Ohm resistor in series. I measured 2V and 35mA. But the PA is not yet aligned for class E mode. Probably the efficiency is less than 50% in the moment.

Anyway several stations seem to copy me :-)

More reporting stations are apprechiated, if you like to test your sensitive RX :-)

73, Stefan/DK7FC

PS: Later, i want to try to rectify some RF coming from AFN to my antenna. It this is fed to a 10F gold cap and WSPR-2 in 33% ratio is sent, maybe i can run that PA from the energy of AFN :-)



<= a moz-do-not-send=3D"true" href=3D"http://www.avast.com/">

Ce courrier =E9lectronique ne contient aucun virus ou logiciel malveillant parce que la protection Antivirus avast! est active.


--------------030207060106010200000003--