LF: VLF dj8wx on 8970.022Hz

[uwe-jannsen@kabelmail.de]

Hi all,

 

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

 

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.

OK. I added two other 10Mohm  in series multiplyed the result by 1000 and got 40000Vpp

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

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

I cant measure the Tesla voltage when the  power is raised because the oscilloscope or other

instruments indicate results without connected to the object under test.

 

the station is on the air in mode QRSS3600 on 8970.022Hz since today 1640UTC.

 

current into the radials: one Ampere.

 

who will try to calculate the ERP?

the aerial in use can be seen at

 

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

 

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

 

best regards

Uwe/dj8wx