That was me that had a leak. It was the original 11" V/U/7/800. Dr. Jack wanted me to return it and it replaced it for free since it was within the one-year warranty period. My replacement was a different model, though, as I think the original model was already out of production. Shorter, about 7.5", and didn't seem to work as well on VHF as the original. (I suspect it's either the 2m/440 model or 2m/220/440 version -- I don't have an analyzer to test it). Also, at least with my Larsen NMO mounts (magnet and hole) if you use the supplied rubber gasket under the antenna the center pin on the antenna doesn't make contact with the mount, so you have to go without the gasket.I haven't heard good things with regards to the quality. One user here on RR claimed his leaked and had water inside it. I don't think the NMO center connector would hold up over time if you installed/removed it very often. One light whack would snap that like a pretzel! The price seems high, $114.00. I think half of that would be plenty. Thanks for posting however.
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I'm not very familiar with how to interpret what I'm seeing in these images, and they are hard to read on my screen. Am I understanding properly that the lowest SWR is at 418MHz?Okay I'll eat crow now. Sorry I forgot I had my splitter involved and grabbed the wrong coax. Don't sweep antennas while in a hurry!
I assume you are referring to this one?Joshua, based on what you noted, the Larsen tri-band would be better suited for your frequency needs. It sweeps better than the Scan III in the 140-165, 440-470, and it may be even on 895-960 range. You're also lucky as the Larsen 150-450-800 is half the price. I believe there's a new model out with a spring. I could be wrong.
For my needs, the Scan III looks like a better solution. My placement will not be the same though, but one must experiment.
I'm also curious what kind of ground plane you were using when you did the sweep? I seem to recall the inventor saying this antenna works best when it is a the edge or corner of it's ground plane, which I don't understand why.The sweep is 30 Mhz to 1 Ghz.... look at the first picture.
I'm also curious what kind of ground plane you were using when you did the sweep? I seem to recall the inventor saying this antenna works best when it is a the edge or corner of it's ground plane, which I don't understand why.
Don't you have access to any other mounts that could work better in those situations?I also understand your concern with the height and garage. I use a motorized mount for my VHF/UHF mobile antenna.
Don't you have access to any other mounts that could work better in those situations?
A type that are used a lot in europe are one that can be completly installed from the outside, you don't need to have access to the hole from the inside.
The bottom part are cut to a 45 degree angle and are faced to either side of the car and the top part, that the antenna attach to, are secured to the bottom part with a bolt and have a rubber gasket between them to add friction. The bolt are tighten enough to keep the antenna upright at highway speeds.
If the antenna gets in contact with an object the top part twist and the antenna lays flat on the roof. You then just raise the antenna again to an upright position as if nothing had happened. Neither the antenna, the base or the roof are damaged. The rubber gasket usually has to be replace after 5 years or so, depending of the climate.
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