Amateur Radio Stack Exchange is a question and answer site for amateur radio enthusiasts. It only takes a minute to sign up.

Sign up to join this community
Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top

Top Questions

5 votes
3 answers
2k views

Can i use speaker wire as a transmission line?

0 votes
3 answers
51 views

Linux Alternative Time Sync-ing for JS8 or FT8

5 votes
2 answers
60 views

14dB insertion loss for bandpass filter acceptable?

1 vote
0 answers
43 views

Is this amount of loss normal with LMR400?

1 vote
2 answers
173 views

Why do ham radio operators refer to current flow on the outside of coax as common mode current?

1 vote
2 answers
69 views

Baofeng Orange Transmit light comes on by itself (triggered by sound)

0 votes
0 answers
80 views

How can i make an ULF spiral antenna for agriculture [closed]

2 votes
4 answers
103 views

Is an off-center fed dipole (and/or doublet) inherently unbalanced?

2 votes
1 answer
328 views

Help on identifying signal type and extract audio from a signal

2 votes
2 answers
91 views

How do I rewire a simple a.m. loop antenna that became unwound?

10 votes
3 answers
2k views

Would it be possible for a software-defined FM receiver to demodulate two signals on the same frequency?

0 votes
3 answers
85 views

ELF antenna receiver build instructions?

9 votes
2 answers
2k views

Why are longer antennas not suitable to pick higher frequencies?

1 vote
2 answers
76 views

How to best ditch the counterpoise of a random wire antenna?

2 votes
3 answers
50 views

Is a UHF connector any real disadvantage off the transmitter circuit board or at an antenna feedpoint?

2 votes
3 answers
81 views

Why does an HF "monopole" need dozens and dozens of radials while a VHF/UHF "ground plane" antenna only needs four?

4 votes
3 answers
182 views

What is the difference between antenna input impedance and its radiation resistance?

2 votes
1 answer
84 views

Core mix preferences for a balun (or unun) vs a choke

2 votes
1 answer
42 views

How can a low-impedance load can damage a FET final amplifier?

0 votes
0 answers
28 views

HAMRS logging app dumped all data

-2 votes
3 answers
82 views

Radio without antenna?

1 vote
2 answers
105 views

Is a 94' dipole antenna fed directly by coax useful for any particular known purpose?

3 votes
2 answers
102 views

Can someone without privileges on a band operate FT8 on it using the callsign of a ham who does and is present?

0 votes
1 answer
56 views

YouLoop antenna for amateur satellite reception

-1 votes
1 answer
59 views

Transmission power of Apple Wi-Fi antennas (EMF and health)

1 vote
1 answer
40 views

How do I wire an external mic and speaker to the Yaesu FT-250R without using their adapter?

0 votes
0 answers
43 views

Direct call via the repeaters

4 votes
2 answers
298 views

VNA basics, antenna coax cable

1 vote
1 answer
234 views

Why is there a repeater on 146.46? Isn't that a simplex frequency?

0 votes
1 answer
58 views

What power levels do the Baofeng UV-5R/5RA/5RE have? [closed]

2 votes
2 answers
144 views

Why do Baofeng radios have such poor reception reliability?

0 votes
1 answer
32 views

Vertex Standard VZ-28 - Unable to import settings into software due to password

5 votes
3 answers
149 views

What kind of soldering iron is best for PL-259 (UHF) connectors?

0 votes
0 answers
36 views

How to get channel displayed on an Anytone 868UVE

0 votes
1 answer
45 views

Sine wave 'frequency' in recorded signals

1 vote
0 answers
49 views

Does a filter or inductor's power rating matter in its passband, or only in the attenuated frequency range?

1 vote
1 answer
35 views

Motorola XT460 CPS cable pinout

0 votes
1 answer
75 views

Dual driven-element Yagi-Uda antennas

1 vote
3 answers
63 views

Can ferrite rod antenna be made out of the choke?

3 votes
4 answers
118 views

Issues with high SWR on HF Kits EFHW 49:1 UnUn kit

0 votes
1 answer
50 views

Is it possible to use LimeSDR/HackRF with DireWolf?

2 votes
1 answer
142 views

How does injecting a carrier allow a FM receiver to demodulate SSB?

0 votes
2 answers
96 views

Can fanned/parallel endfed antennas be used to get higher gain in some directions?

0 votes
2 answers
280 views

How to run chirp with python3-based system (workaround found now)

0 votes
3 answers
157 views

Can I use a car antenna intended for 2m/70cm on a 868mhz Lora device?

3 votes
1 answer
190 views

How does the material of a fishing-pole mast affect antenna performance?

5 votes
1 answer
210 views

EFHW: better to get far end really high, or middle somewhat high?


Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.