Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [reception]

13 questions
7
votes
1 answer

Where exactly does atmospheric noise (QRN) come from?

Where does the noise I can hear on my 28 MHz receiver come from? I'm not talking about the inherent noise produced by the internal circuitry of the radio, I mean the noise received by the antenna. It's always there, no matter where I am, even if I…
Andrew
  • 3,655
  • 11
  • 31
5
votes
3 answers

Only noise, no signals whatsoever on HF

Last night there was a power outage at home. I was able to see a LOT of stations on 20M (FT8). As soon power returned, all of them disappeared. You can see in the waterfall very clearly when power returned: The odd thing is, noise is around 7 here…
hjf
  • 1,199
  • 9
  • 23
4
votes
1 answer

Boosting Mobile Phone Reception

Yes, I know, this could very well be a controversial topic, so feel free to close this off if you feel it's not a good fit for this site. That said, I'm posting it here because hams (and as a licensed ham, I count myself in that group) know a great…
Buck8pe
  • 967
  • 5
  • 14
4
votes
7 answers

QRN: How to chase down a solid S9 noise floor on 40m only

I am new to this, having just set up my station. I have "very bad" QRN on 40m: S9. Here is the setup: High density suburb with flats and houses Yaesu FT450D with fan dipole at 6m-9m above ground (sloping), this is lower than a building with flats…
Oliver Schönrock
  • 233
  • 1
  • 6
3
votes
1 answer

How to fix radio that my UV-5R receives signal only when I hold the MONI button even with squelch set from 0 to 9

My UV-5R stopped receiving signal - that what I thought at first. After reading many threads here is what I figured out: if I hold the MONI button then I can receive signal I have 2 UV-5R - exact same model and firmware versions - and I did the…
C-Rock
  • 33
  • 2
3
votes
3 answers

Improve AM reception on an old Walkman that has no external antenna

I have an old Philips walkman that has AM/FM radio. I tried AM radio. Really I can get clearly 2 country radios. I caught very poorly 4 foreign radios or different countries, but they have lots of noise. I plug in headphones with quite a long cable,…
Lorthas
  • 141
  • 3
2
votes
1 answer

Receiving an Coded Odd Signal at 137.25MHz but don't know what it might be. It can affect my detection on NOAA 19. Need help

I am a newbie trying to detect NOAA 15, 18, and 19 satellites, which have downlink frequencies between 137 MHz and 138 MHz. I am using an SDR dongle and attached a photo of it to this post. Of course, I will be constructing an antenna specified for…
TEQATAR
  • 43
  • 4
2
votes
3 answers

Receive antenna design for large wooded lot

I've begun setting up a ham station at a rural home with a 3 acre deeply wooded rectangular lot, and a width of at least 100'. Picture shows the house portion of the lot. Currently my primary send and receive antenna is a full-size G5RV (102'…
Jeremy Gilbert
  • 185
  • 6
1
vote
3 answers

Why can I hear Morse when not in CW mode?

I don't "get" CW. I can't understand the chatter on an FM radio broadcast when my radio is set to AM. This makes sense, the signal is modulated using frequency modulation and I am trying to decode it with amplitude modulation so the result is…
Cimm
  • 135
  • 5
1
vote
0 answers

How do I Construct a Simple FM Antenna?

I recently bought a cheap stereo amplifier with built in FM receiver from Amazon at the first link below. Testing it out today I found the FM reception to be sub-par. All of my local stations that I can pick up in my car sound fuzzy. The antenna is…
Bill Tedinator
  • 11
  • 1
0
votes
2 answers

Tuning two antennas using wire length

I've heard that in the early spark-gap wireless telegraphy era people would use kites with a wire acting as antennas and if the receiving side had a wire length that was an even division or multiple of the wire length on the transmitting side, the…
elgroovy
  • 25
  • 5
0
votes
1 answer

NOAA weather broadcasts

I am getting no NOAA weather broadcasts, after loading all NOAA weather channels into memory or entering the frequencies manually on a new Baofeng UV-5R?? Why? Do I need to do something else?
Rich
  • 1
  • 1
0
votes
1 answer

How does PTT from one two-way radio prevent input on another?

I'm very much a beginner with radio. I have a simple set of Baofeng BF-888S radios, and in my basic use with those, I got very curious about something: when you push the PTT button on one radio to speak, what is happening in the other radios on the…
Gregir
  • 103
  • 3