receiver

I need to know why an FM broadcast can't travel too far (from one side of the earth to other) like an AM broadcast that could travel thousands of miles after getting reflected from the ionosphere. Why can't FM signals be sent to the ionosphere for high range broadcast?

I need to know whether the radio receivers that are highly sensitive, like having sensitivity less than 0.0224 micro volts for AM reception, encounter less fading than the others with less sensitivity? Which specification of a radio receiver is responsible for mitigating fading?

So i have been struggling to figure the answer out to this question for a while now. I bought the RTL-SDR kit and i don't know how to configure the antenna, videos on youtube have conflicting answers i see one person say use it one way and then another person in a different video says to use it...

***SOLD*** Selling Airspy HF+ Discovery SDR which has become surplus to my needs here. Purchased a few months ago. It has been used indoors in a non-smoking environment and is in excellent condition. Comes with original box and USB cable. If you're reading this you likely know this SDR's...

I need to know which antenna among the monopole, dipole, and discone is best for HF reception?

Selling it to fund my next ham radio purchase. Radio is in excellent working conditions, nothing scratched, rusted or burned out. Radio comes with DC cables and AC adapter. Please note the condition of the AC adapter cable. When I bought it, the previous owner had it terminated in such a way...

Hello, I am currently about to buy a police scanner sds100 uniden and what i am looking for exactly is to detect the presence of law enforcement officials nearby by only picking the signal (such between 1 and 5 mile away) but i am not 100 percent sure if this device can only pick cell tower...

I am looking to sell my Realisic brand Solid State Communications Receiver DX-150, it is still in very good condition, and is 100% completely functional, and it’s also a great addition to any radio collection. *Please note: this does not include the original external speaker that it came with...

Selling seldom used Afedri LAN-IQ SDR. This is a very versatile standalone SDR that shows 768 KHz of spectrum as a standalone, and 2.2 MHz when connected to a LAN and accessed via SDR Console or HDSDR. Exceptionally sensitive on VHF and above. I never used it for HF reception. It covers 50 KHz...

Receiver works, backlight is out, readable as long as you're not in the dark. Should be easy to replace the bulbs. Make a fair offer or a trade? Price is shipped.

***SOLD*** Apparently I can't mark it as such if it is sold to someone outside of RR? Hello, I bought this CloudSDR on 4/6/21. It was either going to be this or reacquiring an Icom IC-R8600 for which I had looked for a good price on for months. As things often happen, once I ordered the...

***SOLD*** Selling used Icom IC-R8500 receiver. Receiver is in good condition. I am the second owner and know the original owner personally. This radio has been well cared for for its lifetime thus far. Will come with AC power supply, jumper to make that function properly, a short 12VDC cable...

UPDATE: 4/5/2021: SOLD! UPDATE: 4/5/2021: Sale pending. UPDATE: 4/3/2021: Price is now $375. Includes shipping to you in the United States (or free pickup if you're in Phoenix, AZ). Hello folks, I recently sold my Uniden SDS100 here, but divorce lawyers are expensive so I'm down to selling my...

This SDR had a reasonably brief stay here. I am the original owner. It is in excellent condition and was always used indoors in a non-smoking environment. Includes original box. This does NOT include a USB cable; SDRPlay did not include them. You must provide a standard good quality USB cable...

I'm going to be selling my family's AOR DV-1. This receiver has been handled extremely carefully its entire life and treated with extreme care. I will be uploading pictures shortly, but am making a preemptive post to see if there are people who will be interested. $1,200.00

There is no category that this fits in perfectly, but I think this is the best fit. I am wondering how much RF power (field strength) does it take to blow out a generic handheld AM receiver? If I am about 200 ft away from a 1/4 wave MW antenna and it is producing 1kW, will I blow out my...

Hi there. Might be a bit of an odd one, but I'm trying to research the plausibility of movie story line. During the 70s there used to be clunky old FM system hearing aids (Phonic Ear was a brand) that kids would strap the receiver to their chests and the teacher would wear the...

Pretty straightforward question: Is there a standalone device that can receive such a large spectrum as an RTL-SDR dongle? I'm new to radio usage in general, so I'm open to any suggestions that could make this post and future posts better.

Hey guys, I'm working on getting a mobile setup installed and had a question regarding my scanner. I'll have three radios and my scanner.. 4 antennas total. Scanner has a dedicated antenna. My question is, is there anything on the market that can disconnect the antenna from my scanner if I...

Hello, my team and I are launching a cube sat into space. We are fairly new to radio and are not sure what radio transmitters or receivers to use. We would need to transmit to a distance of about 251 miles, we can have a fairly large ground station, but the transmitter and receiver would need to...