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From: =?ISO-8859-15?B?QW5kcukgR3V56Q==?= <andre.guye1@aliceadsl.fr>
To: <rsgb_lf_group@blacksheep.org>
References: <530A3920.9020308@iup.uni-heidelberg.de>
In-Reply-To: <530A3920.9020308@iup.uni-heidelberg.de>
Date: Sun, 23 Feb 2014 19:25:53 +0100
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Subject: Re: LF: WSPR MF QRPPPPP by DK7FC ??
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Ok Stefan,

here hard to copy you because your TX frequency is not clear at this moment=
=2E

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 powe=
r!

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

The desired RF power is arround 20...40 mW, at 2 V DC. And i'm using a BS17=
0 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 serie=
s. 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 sensitiv=
e 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 c=
an run that PA from the energy of AFN :-)


---
Ce courrier =E9lectronique ne contient aucun virus ou logiciel malveillant =
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e></HEAD>
<BODY dir=3Dltr bgColor=3D#ffffff text=3D#000000>
<DIV dir=3Dltr>
<DIV style=3D"FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>Ok Stefan,</DIV>
<DIV>&nbsp;</DIV>
<DIV>here hard to copy you because your TX frequency is not clear at this 
moment.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Please, what is the current intensity at the base of the antenna ?</DI=
V>
<DIV>&nbsp;</DIV>
<DIV>Andy.</DIV>
<DIV 
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; F=
ONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV style=3D"FONT: 10pt tahoma">
<DIV>&nbsp;</DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A 
title=3Dschaefer@iup.uni-heidelberg.de 
href=3D"mailto:schaefer@iup.uni-heidelberg.de">schaefer</A> </DIV>
<DIV><B>Sent:</B> Sunday, February 23, 2014 7:08 PM</DIV>
<DIV><B>To:</B> <A title=3Drsgb_lf_group@blacksheep.org 
href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org</=
A> 
</DIV>
<DIV><B>Subject:</B> LF: WSPR MF QRPPPPP by DK7FC ??</DIV></DIV></DIV>
<DIV>&nbsp;</DIV></DIV>
<DIV 
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; F=
ONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>He=
llo 
all, <BR><BR>You all know me as a QRP station :-) But today i want to run e=
ven 
less power!<BR><BR>While running in the sunny afternoon i got the idea to b=
uild 
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 homemad=
e 
galvanic element, maybe 2 in series!<BR><BR>The desired RF power is arround=
 
20...40 mW, at 2 V DC. And i'm using a <A 
href=3D"https://dl.dropboxusercontent.com/u/19882028/Datenbl%C3%A4tter/BS17=
0.pdf">BS170</A> 
MOSFET for that PA. The biggest part will be the BNC jack :-)<BR><BR>So far=
 i'm 
testing with an empty 9V battery and a 100 Ohm resistor in series. I measur=
ed 2V 
and 35mA. But the PA is not yet aligned for class E mode. Probably the 
efficiency is less than 50% in the moment. <BR><BR>Anyway several stations =
seem 
to copy me :-)<BR><BR>More reporting stations are apprechiated, if you like=
 to 
test your sensitive RX :-)<BR><BR>73, Stefan/DK7FC<BR><BR>PS: Later, i want=
 to 
try to rectify some RF coming from AFN to my antenna. It this is fed to a 1=
0F 
gold cap and WSPR-2 in 33% ratio is sent, maybe i can run that PA from the =

energy of AFN :-)<BR><BR></DIV></DIV></DIV>
<br /><br />
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etica"; font-size:12pt;'>
				Ce courrier =E9lectronique ne contient aucun virus ou logiciel malveill=
ant parce que la protection <a href=3D"http://www.avast.com/">Antivirus ava=
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