Downtown "RFI rich" environment.

REDHULK

Newbie
Joined
Nov 12, 2022
Messages
1
Hello everybody,

Greetings and my best wishes!

Just registered, although was browsing this site for a while and like it very much. For some time, already, digging into SDR, but my interest, exclusively, in receivers. Have no intention to transmit. I would like to experiment with VHF/UHF SDR receivers, listen to air traffic, police, FD, utilities, Hams, but have a very serious considerations regarding location and surroundings of my apartment and related problems with reception and antenna to use with SDR. I am living on 14th, the highest, floor of concrete building in downtown Tampa, Florida, in small apartment. I do not have balcony, just huge windows, two sections on the sides can be slide up open to outside air. Apartment, practically, on the East corner of the building. Windows, looking, almost strait on the South. In 100 feet, you see expressway and after 200 feet is river and bay. Right over my apartment, on roof top there are , maybe, about 15 cellular or some communication (as far as I can correctly identify them ?) antennas (it is ,like 30-70 feet from my windows , on the roof top). On the East side of the building, (it is little North/East, just around the corner), is major TV station with all bunch of huge dishes, 8 of them, telecommunications antennas tower, weather radar and so. Looks like they transmitter is not in this area, far away from downtown. About 200 feet from this TV station, in same N/E direction, is high-rise, like 40 floors, 450-500 feet tall building, and it has VHF/UHF repeater on the roof. This repeater I am hoping to monitor.

So, guys, I will greatly appreciate your opinion on this “RFI rich” environment, and if I have any chance (with good antenna, have a lot of restrictions on this: can just stick it out of the window for the time of receiving) receive any audible content?? Or, that would be, mostly interference and noise? Regarding receiver, I am thinking something like WiNRADIO WR-G305e, WR-G315e. Could be any other SDR, VHF/UHF receiver with reasonable price and performance. Sorry for such lengthy description, just wanted to make sure you, guys, can better understand my situation.

Thank you very much in advance, for your time and consideration.

With my regards and respect ,

REDHULK.
 

JamesWest

Member
Joined
Jan 28, 2021
Messages
130
I use a AirSpy Mini when I travel. Inexpensive, extremely small and works great with SDR#. Antenna is Diamond SRH77CA. Suction cup can go inside or out, tripod clamp and USB extension cable to Notebook or antenna with coax to SDR inside. Light weight camera tripods with clamps also works well. Other antenna suggestion WA5VJB 400-1000 Mhz Log Periodic. At home I have Diamond discone and various beams for different bands. Two lightweight Inmarsat antennas on a camera tripod but the gray patch uses a suction cup. Just various ideas.
 

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popnokick

Member
Premium Subscriber
Joined
Mar 21, 2004
Messages
2,841
Location
Northeast PA
For the very wide VHF / UHF freq range In which you are interested this antenna covers it well and is very inexpensive. Especially the wire version (scroll down the Wiki page to see that). The antenna can be hung vertically in one of your windows. You’ll need an adapter to go from the F-type connector on the coaxial cable to your radio. Another inexpensive alternative that offers some directionality and signal gain are the HDTV flat panel “leaf” antennas that can be purchased almost anywhere. Most of them are quite broadband and TV freqs are very close to the VHF / UHF scanner bands.
Here is a link to the wire off-center scanner antenna. At the price you can probably afford to try both the flat panel TV antenna and the wire OCFD -
 
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