[TowerTalk] Baluns for RX antennas

[Craig Smith]

I'm using an AIM 4170.  Accuracy not the best at high impedances.  As a rule-of-thumb, I'm comfortable with it to give meaningful measurements up to about 2 Kohms and useful relative results up to 5 Kohms.

73  Craig  AC0DS


> The SRF of these chokes is about 2.4 MHz, so they will operate below resonance on 160 and the BCB and above resonance elsewhere.  I measured>  7.5 Kohms impedance at resonance, but it is probably higher due to my measurement limitations.  The impedance vs. freq is roughly as follows:
> 
> 500 KHz	1.4 K ohms
> 1 MHz	3.5 K
> 5 MHz	4 K
> 10 MHz	2 K
> 20 MHz	1 K
> 30 MHz	0.6 K
> 


out of curiosity.. what was your measurement setup?