View Single Post
  #1   Report Post  
Old December 27th 04, 02:09 PM
PDRUNEN
 
Posts: n/a
Default TV antenna impedance measurements with MFJ-269.

Hi Group,

Have a MFJ-269 here (new toy) and did a bit of expermienting with the TV
antenna over the Christmast weekend, I have one of those 13 element antenna
from radio shack, I don't know the exact part number.

I tied the MFJ-269 into the 300 ohm to 75 ohm balun at the antenna. The
antenna being about 20 feet up on the house peak.

Looking at the impedances I got, nothing really looked good at the TV
frequencies as I would have expected.

If the match is this bad, I would expect alot of loss from the fact that I run
75 ohm cable down from this antenna to the TV set.

Could my reading be mis-leading since the balum is a 4:1 going from 300 ohm to
75 ohm?

Has anyone done this before and posted the data? I would be interested to see.

I don't have my data in front of me at this time so I don't have any
measurements to post.

I really find the MFJ-269 an exceptional device for the antenna experimenter.

Tnx de KJ4UO