Arrow OSJ144/440 Video Review
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@N7TFP my coaxial choke balun is actually about 4-5 turns and 8" diameter like in the J-Pole YouTube video of EI5GLB
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Great review very detailed. I put one up also and enjoying the better range. 73 W6USC
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It doesnt seem to be built like a common J-Pole at all.
There is no shorting stubb, and the 57" and 6" bars seem to be grounded, and only the 19" driven. I dont see how this works 440, as there is no driven element for it besides a grounded one, but i guess it works.
Im wondering if all was removed except the 19" element, if it would still work?
Inexpensive though, i may get one.
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Thanks for the info bro. And thanks for getting back to me so quickly.
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Thanks for the review! After 7 years, my Arrow OSJ 146/440 continues to work flawlessly. I suspect its operating principle is similar to half of an open sleeve dipole, which would make the coax shield part of the radiator. Winding about 8 turns of the coaxial cable into a choke balun at the feed point decreased my SWR to near flat on 440 MHz.
kp4md 1 month ago in playlist More videos from N7TFP
@kp4md Thanks for that tip... I'll try that when I get a chance!
N7TFP 1 month ago
Thanks for the good review. I'm a newbie here. What ohm wire are you using? Can you use Beldin 9913 coax effectively for this rig? Also, while using an SWR Meter, how do you tune the antenna? Do the antennas adjust with a set screw? Thanks again. I'm sold.
cigarjohn42 9 months ago
@cigarjohn42 Any 50-Ohm coax should work. The antenna is not designed to be tuned. It has a low SWR for the 2meter and 440 bands.
N7TFP 9 months ago
I just got one of these today and put it up. I noticed that you put your on a wooden mast. I have a wooden mast, but put mine on a 5 foot metal Radio Shack mast. I did put black electricians tape where the arrow antenna is attached to the mast.
I looked all over the minimal instructions and did not find a reference about a preference to wood or metal for a mast for this antenna.
N2LRB 10 months ago
@N2LRB From what I've learned, it shouldn't make a difference with a j-pole. I just did it because the wood was laying around...
Hope you enjoy you're new antenna!
N7TFP 10 months ago