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Top Questions

5 votes
3 answers
2k views

Can i use speaker wire as a transmission line?

9 votes
2 answers
2k views

Why are longer antennas not suitable to pick higher frequencies?

10 votes
3 answers
2k views

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

4 votes
3 answers
182 views

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

2 votes
1 answer
328 views

Help on identifying signal type and extract audio from a signal

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?

1 vote
2 answers
170 views

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

2 votes
2 answers
91 views

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

0 votes
3 answers
85 views

ELF antenna receiver build instructions?

2 votes
1 answer
83 views

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

2 votes
4 answers
102 views

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

1 vote
2 answers
69 views

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

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
82 views

Radio without antenna?

-1 votes
1 answer
59 views

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

2 votes
1 answer
42 views

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

1 vote
2 answers
105 views

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

5 votes
2 answers
59 views

14dB insertion loss for bandpass filter acceptable?

2 votes
3 answers
80 views

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

1 vote
2 answers
76 views

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

0 votes
1 answer
58 views

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

0 votes
0 answers
79 views

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

0 votes
1 answer
56 views

YouLoop antenna for amateur satellite reception

0 votes
3 answers
49 views

Linux Alternative Time Sync-ing for JS8 or FT8

1 vote
1 answer
40 views

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

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?

0 votes
1 answer
45 views

Sine wave 'frequency' in recorded signals

0 votes
0 answers
43 views

Direct call via the repeaters

1 vote
0 answers
41 views

Is this amount of loss normal with LMR400?

0 votes
0 answers
36 views

How to get channel displayed on an Anytone 868UVE

0 votes
0 answers
28 views

HAMRS logging app dumped all data


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