Did I mess up by buying RG174 antenna cable instead of RG8 or RG58?

mmckenna

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Hmm. I guess that just doesn’t make sense to me. For an antenna that would be used for transmitting does but not for receiving only.

It's the same for transmit and receive. Resonate antennas will work better for what you are doing.

Would this be worth trying just between the radio and the antenna? I’d need the adapter that on the bottom was the same as the antenna, of course.

You'd want it at the base of the antenna. Antenna would be sitting on top of the pie pan, coax would run out the bottom to your radio.

But ok, instead of getting all that and if that antenna I linked is junk, wouldn’t I just be better off with just something like this?

Not necessarily.

Discone antennas have zero gain. Their benefit is that they cover a very wide slice of the radio spectrum.
The antenna I linked to will have gain on UHF, where I think your sheriffs office is transmitting.

Compared side by side, the gain on the UHF side of the Larsen antenna will give your radio more signal to work with than the discone.
 

corneileous

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You'd want it at the base of the antenna. Antenna would be sitting on top of the pie pan, coax would run out the bottom to your radio.
OK, but what about that Larson antenna that you posted a few posts back? Wouldn’t that still need a ground plane also?
ONot necessarily.

Discone antennas have zero gain. Their benefit is that they cover a very wide slice of the radio spectrum.
The antenna I linked to will have gain on UHF, where I think your sheriffs office is transmitting.

Compared side by side, the gain on the UHF side of the Larsen antenna will give your radio more signal to work with than the discone.
Hmm.
 

mmckenna

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OK, but what about that Larson antenna that you posted a few posts back? Wouldn’t that still need a ground plane also?

That's what this does:

Your NMO base antenna screws on the top. Coax with male N connector screws on the bottom.
 

corneileous

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That's what this does:

Your NMO base antenna screws on the top. Coax with male N connector screws on the bottom.
I’m sorry, I guess I had forgotten that you had already posted a link to this… Lol. Thanks for posting it again.

But AnyWho, you think it’ll be a good combination between that Larson antenna and that groundplane kit? Also, that’s not very much of a gaudy-looking antenna setup as that other one I was talking about either so hopefully the wife won’t really contest that one.

And as far as using those two together, I’m assuming that, in the photo below, the part of the antenna with the green arrow pointing towards it is what unscrews from the top of the larger diameter part on bottom that the red arrow’s pointing to which would then screw on the top of the ground plane kit, correct?

I’m actually somewhat familiar with that NMO connector; never knew what it was called though but as far as that N connector, I’ve never seen one of those before so I’m assuming that’s similar to like a PL-259 connector for a CB radio coax, correct? Guess I’ll just have to look around for some kind of mounting pipe for that ground plane kit to attach to and then hopefully I can find a 20, 25 foot piece of RG58 coax that has the appropriate BNC connector on one end and that N connector on the other.
 

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mmckenna

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But AnyWho, you think it’ll be a good combination between that Larson antenna and that groundplane kit? Also, that’s not very much of a gaudy-looking antenna setup as that other one I was talking about either so hopefully the wife won’t really contest that one.

The Larsen antenna on a ground plane will outperform the discone for what I think your use case is.

Sounds like you know exactly who you want to listen to, and they are on VHF or UHF. The Larsen is designed exactly for that, with the added benefit of covering 800MHz, if you ever need that.

The only benefit to the discone is that it covers most of the frequencies your scanner will. It doesn't do it well, but it's good enough for most users. If you were the type of scanner listener that was always searching the bands to hear new stuff, that might be a good option. But it sounds like you only want to listen to the locals, and those are on known bands. The wide spectrum coverage of the discone won't benefit you, and the drawbacks (lack of gain) will negatively impact you.

Plus, lower profile keeping the wife happy is always a good thing.

And as far as using those two together, I’m assuming that, in the photo below, the part of the antenna with the green arrow pointing towards it is what unscrews from the top of the larger diameter part on bottom that the red arrow’s pointing to which would then screw on the top of the ground plane kit, correct?

The black larger base screws on the NMO ground plane. The whip does unscrew from the larger base if you want, but no reason to do that.

Just thread the whole thing on top of the base station adapter. Pretty self explanatory when you have both parts in front of you.

I’m actually somewhat familiar with that NMO connector; never knew what it was called though but as far as that N connector, I’ve never seen one of those before so I’m assuming that’s similar to like a PL-259 connector for a CB radio coax, correct? Guess I’ll just have to look around for some kind of mounting pipe for that ground plane kit to attach to and then hopefully I can find a 20, 25 foot piece of RG58 coax that has the appropriate BNC connector on one end and that N connector on the other.

N connectors are the same size on the outside, but the innards are different and non-compatible. They perform much better than the UHF connectors at the higher frequencies.

N connectors would be the preferred choice for this sort of application.
 

corneileous

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Well after doing a quick search on Amazon, I found a 25 foot piece of RG58 that has the male N connector on each end of it which one end would thread onto the bottom of that ground plane but then I would need to find a male BNC to female N connector adapter.

What would you recommend I use or build myself, to make some kind of a pole to put all this on that would screw to the side of the eave on my roof?
 

mmckenna

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What would you recommend I use or build myself, to make some kind of a pole to put all this on that would screw to the side of the eave on my roof?

Make it simple. Get a "J Mount" and use that. This antenna is small and light weight. You don't need a heavy duty mount for it:

 

corneileous

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Well guys, I decided to do something temporary to kind of test the waters. I had to go over to my mom’s house yesterday to do a couple things so while I was there, I decided to grab the coax I was using and the antenna I was using up in the attic. It’s a 50 foot string of RG58 with I believe pl259 connectors on it along with the appropriate adapters to go from the BNC connection to that cable from my scanner and to go from the cable to basically just a right-angle telescopic antenna that you would use as an indoor antenna connected directly to a base scanner with it’s antenna port on the back and after mounting this antenna up on the very peak of my roof, I’m now able to scan 6 to 7 more channels from places that’s over an hour away which is pretty good so one of these days I guess I’ll be getting me one of those discone antennas that has the steel rods on it that looks like an upside down Christmas tree being that it makes its own groundplane. By the way, I didn’t follow the advice of making a groundplane out of a small metal baking pan simply because I just didn’t know how to effectively make one.
 

KA1WBF

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Well guys, I decided to do something temporary to kind of test the waters. I had to go over to my mom’s house yesterday to do a couple things so while I was there, I decided to grab the coax I was using and the antenna I was using up in the attic. It’s a 50 foot string of RG58 with I believe pl259 connectors on it along with the appropriate adapters to go from the BNC connection to that cable from my scanner and to go from the cable to basically just a right-angle telescopic antenna that you would use as an indoor antenna connected directly to a base scanner with it’s antenna port on the back and after mounting this antenna up on the very peak of my roof, I’m now able to scan 6 to 7 more channels from places that’s over an hour away which is pretty good so one of these days I guess I’ll be getting me one of those discone antennas that has the steel rods on it that looks like an upside down Christmas tree being that it makes its own groundplane. By the way, I didn’t follow the advice of making a groundplane out of a small metal baking pan simply because I just didn’t know how to effectively make one.
I'm using a Larson mag mount (Amazon) with a UHF gain antenna (3 db gain) mounted to it. I have that on my metal baseboard radiator so its low to the floor, maybe 8" up. I'm on the southcoast of Massachusetts. I'm using a 996P2. I get pretty good reception. I can hear a lot of stuff from Cape Cod to the east of me and a lot of stuff to my north. the corner of the house where the antenna is faces south, southeast. not great to my north but at some point i will put a different antenna in the attic
 
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