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Top Questions

0 votes
0 answers
27 views

"FPGA firmware is wrong" on Icom 9700

1 vote
3 answers
91 views

Gap between a dipole antenna

0 votes
1 answer
27 views

Programming UV5R with cable

0 votes
1 answer
16 views

How can I derive mode from a DX cluster spot?

1 vote
1 answer
74 views

Why FCC band plans so different from IARU?

0 votes
0 answers
23 views

Morse code help with vocaroo

2 votes
1 answer
53 views

Is there documented FCC/Congressional reasoning behind restricting Tech licensees to CW on HF?

2 votes
1 answer
82 views

NEC2: How do "currents" and "charges" inform antenna design and modeling?

0 votes
2 answers
65 views

Running antenna parallel to steel fence: antenna effects and neighborhood RFI

1 vote
1 answer
40 views

NEC2: Should I model a "tube" or just solid wire (GW) for an aluminum-tube-based antenna design?

2 votes
1 answer
121 views

Insulated mounting pole section for vertical dipole?

6 votes
5 answers
5k views

How to build a remote control unit that works on amateur radio frequencies?

0 votes
0 answers
29 views

End Fed 160-10 meter Antenna

0 votes
1 answer
421 views

How does nitinol shape memory wire work as an Antenna in 60 MHZ whip antenna?

3 votes
0 answers
64 views

Connecting up the vintage Morse Code Instructograph

0 votes
0 answers
37 views

Motorola GM340 flash of LEDs but then no boot up

0 votes
1 answer
43 views

Run antenna coax through hatchback of a Nissan Rogue

4 votes
2 answers
319 views

Use noise figure and gain to calculate weakest signal radio can receive?

0 votes
1 answer
566 views

How would I calculate the diameter of an dish from antenna gain, or effective aperture?

4 votes
1 answer
113 views

Is there a technical reason to sell an LNA without advertising its gain?

1 vote
2 answers
280 views

Why is there so little difference in the gains of Yagi Uda antennas with omnidirectional antennas? Shouldn't the power at the back be at the front?

0 votes
1 answer
125 views

Budget Open Source and Open Hardware SDRs?

4 votes
3 answers
1k views

What is the point of high gain antenna with respect to the maximum EIRP

0 votes
0 answers
40 views

Is there a quick grounding disconnect for coax?

4 votes
0 answers
698 views

The whole neighborhood's internet drops when I transmit on 40M

22 votes
1 answer
935 views

What information should be on a QSL card?

4 votes
2 answers
16k views

Cannot connect Quansheng UV-K5(8) with programming cable

6 votes
2 answers
1k views

Is there any practical advantage to a parabolic reflector over a high-gain beam antenna?

0 votes
1 answer
65 views

Matching antenna at 4.2 GHz using an LC network

2 votes
2 answers
77 views

What do the WSJT-X split frequency options actually do under FT8?

13 votes
4 answers
14k views

Are Baofeng radios illegal in the U.S?

1 vote
0 answers
56 views

Risk of lightning strike with wire antenna in tree?

1 vote
1 answer
51 views

Any better alternatives to bullet connectors for connecting outdoor antenna wires?

0 votes
2 answers
75 views

Other radios can hear my Baofeng but I can't hear them with my Baofeng

0 votes
1 answer
40 views

I want to connect a headset with kenwood (baofeng) plug to a Yaesu FT-60 HT

1 vote
0 answers
88 views

Why does a peak remain at -10db gain and disappear at -50db gain?

2 votes
2 answers
823 views

Beamwidth of omni-directional antenna with gain

3 votes
4 answers
829 views

Relation between antenna physical size and gain

-1 votes
2 answers
60 views

Is the TAOGLAS PCB Antenna Too Long on Purpose?

0 votes
2 answers
53 views

Link budget with transmitter duty cycle (satellite earth station to a 5G terrestrial receiver)

1 vote
3 answers
103 views

How to test a simple homebrew CW transmitter - can I use an AM radio?

0 votes
1 answer
85 views

Uplink signal modulation detection (drone related)

5 votes
2 answers
90 views

Will 2 ferrite beads taped side by side perform the same as a single-piece binocular core?

13 votes
3 answers
3k views

How are secret encodings not a violation of amateur radio regulations?

1 vote
4 answers
4k views

How to increase the bandwidth of half-wave dipole antenna?

2 votes
1 answer
324 views

How can I know (check or detect or analyze) which modulation using of my remote control switch?

2 votes
1 answer
107 views

Can anyone identify what _kind_ of radio this Viking "Mercury" radio is?

2 votes
3 answers
2k views

When to log a callsign suffix for a QSO?


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