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From: Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Thread-Topic: WSPR MF QRPPPPP by DK7FC ??
Thread-Index: AQHPMMKYufJ/mS6MPE2uD3VA5WrnvJrDKL0G
Date: Sun, 23 Feb 2014 18:33:14 +0000
Message-ID: <7E7DFBB4D102A04DB5ADC88D66628A4A0FCEA020@ICTS-S-MBX1.luna.kuleuven.be>
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Subject: LF: RE: WSPR MF QRPPPPP by DK7FC ??
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Hi Stefan,


'stealing' RF-energy can be a crime!

At the time I passed my ham exam (38 years ago) we had to know that.

Not sure that law still exists in Belgium, but maybe you should check Germa=
n laws before you end up in jail ;-)


73, Rik  ON7YD


________________________________
Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org=
] namens schaefer [schaefer@iup.uni-heidelberg.de]
Verzonden: zondag 23 februari 2014 19:08
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: 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<https://dl.dropboxusercontent.com/u/19882028/Datenbl%C3%A4tter/BS170.pdf>=
 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 :-)


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<p>Hi Stefan,</p>
<p>&nbsp;</p>
<p>'stealing' RF-energy can be a crime!</p>
<p>At the time I passed my ham exam (38 years ago) we had to know that.</p>
<p>Not sure that law still exists in Belgium, but maybe you should check Ge=
rman laws before you end up in jail ;-)</p>
<p>&nbsp;</p>
<p>73, Rik&nbsp; ON7YD</p>
<p>&nbsp;</p>
<div style=3D"FONT-SIZE: 16px; FONT-FAMILY: Times New Roman; COLOR: #000000=
">
<hr tabindex=3D"-1">
<div id=3D"divRpF228481" style=3D"DIRECTION: ltr"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>Van:</b> owner-rsgb_lf_group@blacksheep.org [o=
wner-rsgb_lf_group@blacksheep.org] namens schaefer [schaefer@iup.uni-heidel=
berg.de]<br>
<b>Verzonden:</b> zondag 23 februari 2014 19:08<br>
<b>Aan:</b> rsgb_lf_group@blacksheep.org<br>
<b>Onderwerp:</b> LF: WSPR MF QRPPPPP by DK7FC ??<br>
</font><br>
</div>
<div></div>
<div>Hello all, <br>
<br>
You all know me as a QRP station :-) But today i want to run even less powe=
r!<br>
<br>
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!<br>
<br>
The desired RF power is arround 20...40 mW, at 2 V DC. And i'm using a <a h=
ref=3D"https://dl.dropboxusercontent.com/u/19882028/Datenbl%C3%A4tter/BS170=
.pdf" target=3D"_blank">
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 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.
<br>
<br>
Anyway several stations seem to copy me :-)<br>
<br>
More reporting stations are apprechiated, if you like to test your sensitiv=
e 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 10F gold cap and WSPR-2 in 33% ratio is sent, maybe i c=
an run that PA from the energy of AFN :-)<br>
<br>
</div>
</div>
</div>
</body>
</html>

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