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Votes Activity Newest Views Added
61
votes
18
answers
8k
views

Why is Morse code still in use?

modes cw
2d ago David G 19
7
votes
4
answers
3k
views

What fraction of 2x2 USA call signs are vanity calls?

united-states callsign
Sep 6 '19 at 19:48 mrog 982
6
votes
1
answer
531
views

What is “Billion Code” for garage door openers from around 1996?

software-defined-radio digital-modes
Jul 31 '19 at 18:44 Duck Dodgers 223
2
votes
1
answer
251
views

Is MFJ-1708SDR safe with RF switching

software-defined-radio
Mar 27 '18 at 21:53 Glenn W9IQ 17.6k
1
vote
1
answer
169
views

ax.25 error shown in direwolf. Fails on channel 8, then 2, then works

aprs software linux direwolf
Jan 30 '19 at 0:02 ASzy 67
0
votes
2
answers
128
views

How to use 75ohm (RG6) coax?

antenna coaxial-cable impedance impedance-matching feed-line
Oct 12 at 15:18 F. Sessink 474
0
votes
1
answer
2k
views

Input and output impedance of antenna/circuit: theory and measurement methods?

antenna measurement impedance-matching
Jul 26 at 21:18 Daniel 101
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