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Unun Question

9

9mmMick

New Member
Mar 29, 2014
13
1
3
Hi,
I ran some coax straight to a 53' wire, raised it in an inverted V and added some ground planes to the shield braid of the coax.
My antenna tuner tuned up fine and I made some contacts on 40m.
Would of adding a 9:1 unun between the coax and wire given me even better performance
or would it have made no difference?
 

Need to know the actual impedance at the feed point. You just end fed the wire? How high up is it? Where is the tuner (at the feed point or in the shack)?
 
Beetle said:
Need to know the actual impedance at the feed point. You just end fed the wire? How high up is it? Where is the tuner (at the feed point or in the shack)?
Click to expand...

I'm on the second floor of my house.
I erect a 20 foot painters pole from the balcony. So, it's a total of 30 feet from ground (since I'm already 10 feet up).
I also lay two 30 foot strands of wire off the floor of the balcony hanging down to the ground as counterpoise.
The tuner is in the shack underneath my Yaesu 857D.
From Coax 1 output from the MFJ 969 tuner I ran about 25 feet of coax to the balcony outside and soldered it to the 53 foot wire.
BTW, I tried to run the wire straight from the wire output of the tuner inside my house, but my house is stucco and it was impossible to tune with that chicken wire in the walls. :glare:
 
An unun by it's self wouldn't do anything exceptional. It could improve your impedance match, but probably wouldn't, it's already being handled by the tuner anyway. All things considered, you've probablly got it as good as it's gonna get?
- 'Doc
 

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