Topband: Antenna analysers in close proximity to BC station

[Εμμανουήλ Κερατζάκης]

Hi topBanders! 

I live in an area about 10km away from a BC station that transmits on frequency 981khz and whose power is 200Kw. Whenever I had tried to take measurements with a 160m antenna- with the latest equipment on the market- it was always impossible. The equipment was always becoming an FSM. The addition of filters given for this kind of projects did nothing. However, I did manage to solve the problem once and for all by building a simple circuit with materials found in almost every shack's junkbox.
The basic circuit was first introduced by W8CGD "Measurement of R+jx " in QST June 1965 and was gradually improved throughout time.
I will refer to relative articles like the ones by G3HCT in Radcom, June 1979, G3LDO "ARRL ANTENNA COMPENDIUM Vol 4, Vol 5" and lastly a wonderful project and its software by SV1BYO which was based on the method of Five-Meter Method and a Computer.
The whole set up consists of a power source (in my case, Elecraft K2- 1Watt), a digital Voltmeter and a laptop on the base of my antenna. You insert the measurements of the Voltmeter in the appropriate program boxes and you immediately get the results on the measurements of R and jx of the antenna without any interference by the BC station. 

73
Manolis, SV1AOZ