Need recommendations for p25 antenna to monitor a system 25~30 miles away on SDS100
- Thread starter ohgaryoh
- Start date
I have 3 different Remtronix antennas for my SDS100 (7/8/9 monobander, 7/8/9 + UHF, and the tri-band 843s) the 820s is the best of the three for 7/8/9 by about 3dBm over the dual bander and 5dBm over the tri-bander. I haven't found anything more effective than the 820s for portable use on 7/8/9. For that kind of monitoring, I think you're going to need a true mobile or base antenna.
Perhaps a Smiley or other higher-quality makers have an antenna that would improve your reception.
Perhaps a Smiley or other higher-quality makers have an antenna that would improve your reception.
You need to look seriously at an external antenna, if there's any way to do so. Or, try getting a Yagi you can mount inside your house as high as possible in the attic or near a window.
Listing the freqs of interest may yield better recommendations. P25 does not mean anything.
I'm assuming he's talking about a 700/800 system, because of the antenna model mentioned, and because it's required in 700 and de rigeur in 800 most people conflate 7/8 with P25.
P25 is real nice on VHF conventional, too. I wish there were more of it on VHF and UHF.
P25 is real nice on VHF conventional, too. I wish there were more of it on VHF and UHF.
You're going to need an outdoor antenna, perhaps a yagi pointing towards the direction of the (assuming) 700/800mhz systems 30 miles away. Also without knowing what topography is like between you and the destination tower(s) it's uncertain you'll get any reliable pick up at all. 700/800 doesn't propagate as far as VHF/UHF. Also it may help to experiment with the different filter settings
wtp
Member
he has mentioned Georgetown and Austin TX.
might be that.
might be that.
Not uhf or I'll have to get another Unication pager LOL🤪
Yeah sorry about that, here is what I am looking at
| 851.775c | 852.825c | 853.200c | 853.5125c | 853.800c |
Unfortunately I cannot attach an outdoor antenna in this rental. The tower locations are just outside of my location, maybe 5 miles from where the circle ends, I am in Palm Coast.
Here are the two tower locations:
Volusia County (P25) Site: Sanford
Volusia County (P25) Site: Sanford Details
www.radioreference.com
Volusia County (P25) Site: Holly Hill
Volusia County (P25) Site: Holly Hill Details
www.radioreference.com
I moved to FL now, but I picked the wrong county to live in as they went encrypted, I looked at old data and then found out they went encrypted
I'm in Flagler county now, so looking to monitor Daytona Beach systems, seems to be about 25-30 miles away, flat land here in FL. I can pick it up from my location inside the house, but it is very staticky and only hear a few transmissions.
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Yes, but lease says that is off limits to me... kinda strange lease and didn't see all of the fine print until it's too late.. Sucks.
wtp
Member
have you tried both sites ?
| 1 (1) | 001 (1) | Sanford | 851.775c | 852.825c | 853.200c | 853.5125c | 853.800c |
| 2 (2) | 002 (2) | Holly Hill | 851.100c | 851.500c | 852.0125c | 852.0825c | 853.1125c |
wtp
Member
that is two sites.
welcome to flatland.
welcome to flatland.
If that's all your trying to pull in, a Yagi or a Moxon may yield better results. I have this Yagi and it helps with what I need it for. Free returns on Scamazon
Also built a diy Moxon which does pretty good. Both this and Yagi are directional.
772 Mhz Moxon antenna project.
I was introduced to the Moxon antenna at an amateur radio club recently. Since I had been looking around for an easy to build directional antenna to monitor the local 770 MHz P25 system I decided to run the numbers for 772Mhz and see how big the antenna would be. It turned out to be small...
If you can't even temporarily clamp something onto a balcony rail or such, your best bet may be a decent magnet mount scanner antenna on a cheap steel pizza pan or a yagi attached to a broomstick handle. It's sure not the best installation, but it'll be more gain than a duck.
Ok I can order that and point it south of me. I'll have to rig up some sort of pole and base so I can put it inside..If that's all your trying to pull in, a Yagi or a Moxon may yield better results. I have this Yagi and it helps with what I need it for. Free returns on Scamazon
View attachment 179705
Also built a diy Moxon which does pretty good. Both this and Yagi are directional.
772 Mhz Moxon antenna project.
I was introduced to the Moxon antenna at an amateur radio club recently. Since I had been looking around for an easy to build directional antenna to monitor the local 770 MHz P25 system I decided to run the numbers for 772Mhz and see how big the antenna would be. It turned out to be small...forums.radioreference.com
Is there just not a good attachable antenna? I don't care if it's 3 ft tall, just makes it more portable.
I can probably do that but won't be able to drill into the wall for the cable. Landlord will call the Portuguese mafia..
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