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Subject: LF: VLF dj8wx on 8970.022Hz
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------8C6E77A0319340FCA00660E36DFB2A37
Content-Type: text/plain; charset=Windows-1252
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Hi all,=20

Im doing some measurements trying to find out how low (high?) the ERP of=
 my system is.=20

the test lead of the oscilloscope in use has a resistor of 10Mohm. The osc=
illoscope advise text says that I have to multiply the result by 10.=20

OK. I added two other 10Mohm=A0 in series multiplyed the result by 1000 an=
d got 40000Vpp=20

using the twentieth of max TX power. 40kV? Is that possible?=20

the current from the coile foot into the radials was 0.145A (3 A with max=
 power). =20

I cant measure the Tesla voltage when the =A0power is raised because the=
 oscilloscope or other =20

instruments indicate results without connected to the object under test.=
=20

the station is on the air in mode QRSS3600 on 8970.022Hz since today 1640U=
TC.=20

current into the radials: one Ampere.=20

who will try to calculate the ERP?=20

the aerial in use can be seen at =20

http://dj8wx-dl.de/hompage500kHz/TX%20equipment.htm=20

fourth pic on the site. The shown 23m long wire has been lengthened to 43m=
.=20

best regards=20

Uwe/dj8wx

------8C6E77A0319340FCA00660E36DFB2A37
Content-Type: text/html; charset=Windows-1252
Content-Transfer-Encoding: quoted-printable

<span style=3D"font-family: Arial; font-size: 13px;"><p>Hi all,</p>
<p>&nbsp;</p>
<p><span>Im doing some measurements trying to find out how low (high?) the=
 ERP of my system is.</span></p>
<p><span>&nbsp;</span></p>
<p><span>the test lead of the oscilloscope in use has a resistor of 10Mohm=
. The oscilloscope advise text says that I have to multiply the result by=
 10.</span></p>
<p><span>OK. I added two other 10Mohm&nbsp; in series multiplyed the resul=
t by 1000 and got 40000Vpp</span></p>
<p><span>using the twentieth of max TX power. 40kV? Is that possible?</spa=
n></p>
<p><span>the current from the coile foot into the radials was 0.145A (3 A=
 with max power). </span></p>
<p><span>I cant measure the Tesla voltage when the &nbsp;power is raised=
 because the oscilloscope or other </span></p>
<p><span>instruments indicate results without connected to the object unde=
r test.</span></p>
<p><span>&nbsp;</span></p>
<p><span>the station is on the air in mode QRSS3600 on 8970.022Hz since to=
day 1640UTC.</span></p>
<p><span>&nbsp;</span></p>
<p><span>current into the radials: one Ampere.</span></p>
<p><span>&nbsp;</span></p>
<p><span>who will try to calculate the ERP?</span></p>
<p><span>the aerial in use can be seen at </span></p>
<p><span>&nbsp;</span></p>
<p><span><a href=3D"http://dj8wx-dl.de/hompage500kHz/TX%20equipment.htm">h=
ttp://dj8wx-dl.de/hompage500kHz/TX%20equipment.htm</a></span></p>
<p><span>&nbsp;</span></p>
<p><span>fourth pic on the site. The shown 23m long wire has been lengthen=
ed to 43m.</span></p>
<p><span>&nbsp;</span></p>
<p><span>best regards</span></p>
<p><span>Uwe/dj8wx </span></p>
<p><span>&nbsp;</span></p>
<br /></span>

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