[TowerTalk] Balun query

[Jim Lux]

At 05:41 PM 11/28/2006, Barry Fox wrote:
>Fellow TTers:
>I have a bunch of W2AU baluns, none of which are marked in any way
>except the call sign.  I also have a Ultra-Bal 2000 model UB-1 balun.
>
>1.  Is there any way to tell whether a balun is a 1:1 or 4:1 or
>whaterver:1?

hook a 50 ohm load across the antenna side and measure the SWR?  If 
it's 1:1 (or close) it's a 1:1 balun, if it's a lot worse, it's a 4:1.

If you have a scope or RF volt meter, put an rf signal of 1 volt in 
one side and look at the voltage on the other side (4:1 is 2:1 voltage)


>2.  I have googled the Ultra-Bal trying to find its specs to no avail.
>Anyone know what kind it is?
>
>No, I do not own a network analyzer or have access to one.
>
>Thanks for any assistance.
>73,
>Barry - W1HFN
>
>
>
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