[TowerTalk] Testing a Balun

[D. Calder]

It's not like it's the most expensive piece of equipment you have for your
hobby.
When in doubt, just buy a new one. I probably have a half dozen laying
around in my shed here
collect over the years..

Then again, just put the smoke back in that one.


Dave n4zkf
www.n4zkf.com



-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of David Robbins K1TTT
Sent: Saturday, December 06, 2008 8:17 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Testing a Balun

Well, if it reads open or shorted then its probably bad.  If the blue smoke
came out its probably bad also.  If you punched a hole in the insulation or
partially melted it down so that it is weakened but not dead then who knows
unless you tear it apart.  


David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
 

> -----Original Message-----
> From: Richard Hill [mailto:rehill at ix.netcom.com]
> Sent: Sunday, December 07, 2008 00:58
> To: k1ttt at arrl.net; towertalk at contesting.com
> Subject: RE: [TowerTalk] Testing a Balun
> 
> I understand that this tells the balun ratio, but does it also 
> indicate that it is working properly?  Other than tearing a balun 
> apart, I've wondered how to tell whether I'd killed one with high 
> voltage or too much power.
> 
> Rich
> NU6T
> 
> -----Original Message-----
> From: towertalk-bounces at contesting.com 
> [mailto:towertalk-bounces at contesting.com]On Behalf Of David Robbins 
> K1TTT
> Sent: Saturday, December 06, 2008 8:02 AM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] Testing a Balun
> 
> 
> Hook the 259b to the coax/unbalanced side, and hook a 50 ohm 
> non-inductive resistor across the balanced terminals.  Read the 
> impedance on the 259b and that will tell you the transformation... if 
> it reads 50 ohms its 1:1, if it reads 25 ohms its 2:1, etc.
> 
> 
> David Robbins K1TTT
> e-mail: mailto:k1ttt at arrl.net
> web: http://www.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> 
> 
> > -----Original Message-----
> > From: towertalk-bounces at contesting.com [mailto:towertalk- 
> > bounces at contesting.com] On Behalf Of KC2PCR
> > Sent: Saturday, December 06, 2008 15:52
> > To: towertalk at contesting.com
> > Subject: [TowerTalk] Testing a Balun
> >
> > Hello & Happy Holidays to All!
> >
> >
> >
> > I would be interested to know what the procedure would be to perform 
> > a test on a balanced to un-balanced transformer (balun) like the 
> > Unadilla W2AU
> to
> > determine It's value and also if its working properly. IE: values= 
> > 1:1 ,
> > 4:1
> > , 9:1 etc.
> >
> > I have a 259B analyzer and a bench style muli-meter as available 
> > test equipment, and would obtain whatever else may be needed.
> >
> > My apologies in advance for a poor understanding in the area of 
> > antenna current & impedance, it isn't from a lack of trying ;)
> >
> > Thanks & 73
> >
> > Doug - kc2pcr
> >
> > Oneida Lake, NY
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk at contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> 
> 
> 
> _______________________________________________
> 
> 
> 
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> 
> 



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