Balun's... I'm confused...
 

Hi,

I am cleaning up and putting back into service my old Channel Master scanner
antenna. This antenna is similar to the Scantena:

http://users.cis.net/kingpop/Scanner/Scantenna.htm

My question has to do with the Balun. I plan to use RG-6 cable with
this Balun from Radio Shack (standard TV type 300 ohm to 75 ohm):

http://www.radioshack.com/product.as...t%5Fid=15-1140

Does anyone see a problem using this Balun? The original Balun that
came with the Channel Master was a more heavy duty looking one..

When I do a continuity check on the new TV type balun I get a dead short
when connecting my meter across the two leads. I get nothing at the F
connector... like it is not even connected to the leads.

When I do a check of my old balun (that is cracked and weathered) I get a
dead short from the center of the F connector to either of the leads.. I get
nothing at the outside of the F connector. I also get the dead short when
testing across the leads.

Thanks for any advice on this!!

Fred
KD6ZDJ

(remove SPMFLTER to reply)

Fred,
That sounds about right, ought to work okay.
'Doc

So which one is correct of these 2 scenarios, is one of the balun's bad?

Thanks for the reply!!

1) When I do a continuity check on the new TV type balun I get a dead short
when connecting my meter across the two leads. I get nothing at the F
connector... like it is not even connected to the leads.

2) When I do a check of my old balun (that is cracked and weathered) I get a
dead short from the center of the F connector to either of the leads.. I get
nothing at the outside of the F connector. I also get the dead short when
testing across the leads.


"'Doc" wrote in message ...


Fred,
That sounds about right, ought to work okay.
'Doc

Fred:

They're probably both OK. Some include a dc blocking capacitor on the 75
ohm end. Try the two back to back on a TV set for a RF check.

--
Crazy George
Remove N O and S P A M imbedded in return address
"Fred" wrote in message
...
So which one is correct of these 2 scenarios, is one of the balun's bad?

Thanks for the reply!!

1) When I do a continuity check on the new TV type balun I get a dead
short
when connecting my meter across the two leads. I get nothing at the F
connector... like it is not even connected to the leads.

2) When I do a check of my old balun (that is cracked and weathered) I get
a
dead short from the center of the F connector to either of the leads.. I
get
nothing at the outside of the F connector. I also get the dead short when
testing across the leads.


"'Doc" wrote in message ...


Fred,
That sounds about right, ought to work okay.
'Doc

pull out the handbook and look at how a 4:1 balun is wound and the
measurements fall in to place.

"Fred" wrote in message
...
Hi,

I am cleaning up and putting back into service my old Channel Master
scanner
antenna. This antenna is similar to the Scantena:

http://users.cis.net/kingpop/Scanner/Scantenna.htm

My question has to do with the Balun. I plan to use RG-6 cable with
this Balun from Radio Shack (standard TV type 300 ohm to 75 ohm):


http://www.radioshack.com/product.as...t%5Fid=15-1140

Does anyone see a problem using this Balun? The original Balun that
came with the Channel Master was a more heavy duty looking one..

When I do a continuity check on the new TV type balun I get a dead short
when connecting my meter across the two leads. I get nothing at the F
connector... like it is not even connected to the leads.

When I do a check of my old balun (that is cracked and weathered) I get a
dead short from the center of the F connector to either of the leads.. I
get
nothing at the outside of the F connector. I also get the dead short when
testing across the leads.

Thanks for any advice on this!!

Fred
KD6ZDJ

(remove SPMFLTER to reply)