Long Wire Receive Only Ant. And "Shorted Turn" Pulley Question ?

BOBRR

Member
Joined
Dec 15, 2004
Messages
1,023
Location
Boston, MA
Hello,

Am stringing a longer simple long wire ant. outside house.
I do listening only, <30 MHz or so. Sometime I try higher.

Got to thinking about this a bit last night.
Not an EE, so would be most appreciative for any thoughts.

I have an all metal very small pulley to help support the wire.
Looking at it, it probably represents a true "shorted turn", as the metal of the pulley totally
encircles the wire.

For a receive only ant. like this, will this "shorted turn" likely have
any performance implications ? Why ?

Keep it, or remove it (big pain) ?

Much thanks,
Bob
 

ridgescan

Member
Joined
Apr 1, 2008
Messages
4,635
Location
San Francisco, Ca.
Hello,

Am stringing a longer simple long wire ant. outside house.
I do listening only, <30 MHz or so. Sometime I try higher.

Got to thinking about this a bit last night.
Not an EE, so would be most appreciative for any thoughts.

I have an all metal very small pulley to help support the wire.
Looking at it, it probably represents a true "shorted turn", as the metal of the pulley totally
encircles the wire.

For a receive only ant. like this, will this "shorted turn" likely have
any performance implications ? Why ?

Keep it, or remove it (big pain) ?

Much thanks,
Bob
To me it'd be worth a try IE-experiment. We SWL guys all experiment with our antennas. I described to you in your other thread how I softly bent my wire around an 8" PVC pipe (I cut a 4" groove along that PVC to hold the wire in place under tension). I did this as I did not want any sort of "electrical interruption" at that bend, I wanted continuity. But maybe your metal pulley will do fine with that sharp bend-the pulley will be part of the wire.
In this photo, you can't see the wire, but you can see, where the big trees are, at the perimeter in the distance, that white PVC where my wire bends.
 
Last edited:

wowologist

Certifiable
Joined
Jul 21, 2013
Messages
87
Location
CM87
It may add slight capacitance if your looping it around, but as far as shorting as long as the pulley itself is not attached physically to any other source of grounding its not going hurt at all. I would presume your using pve or a coated wire, if not, even bare wire wouldn't be effected, as you would be just be adding more metal to an antenna element thru direct contact.
 
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