[Amps] how to read antenna R + jX ??

zl1aih@ihug.co.nz zl1aih at ihug.co.nz
Sat Feb 26 22:29:29 EST 2005


Hi All,
I have an Autek RF-1 and have had no difficulty with determining 
the sign of j - just follow the instructions and note Z at the 
frequency of interest - then increase frequency by a small 
amount.
If the Z reading becomes lower, then the reactance of the system 
being tested is capacitive, e.g., the antenna is too short.
The converse situation applies.

(The L and C readings are not used in the above application.)

However, neither the RF-1 or MFJ 259 are laboratory instruments 
and their readings are intended more for guidance than accuracy.   
The MFJ is easier to use but is more expensive and heavier than 
the RF-1. 
Oh for a GR 1606 bridge. <G>
73, Ken   ZL1AIH


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