natevw - AF7TB's user avatar
natevw - AF7TB's user avatar
natevw - AF7TB's user avatar
natevw - AF7TB
  • Member for 9 years, 7 months
  • Last seen more than a week ago
25 votes
3 answers
44k views

Why are some 1:1 current baluns twice as complicated as others?

13 votes
1 answer
4k views

Is there any legal recourse against unauthorized usage of a private repeater in the USA?

12 votes
3 answers
1k views

What "test transmissions" are allowed above 51MHz?

11 votes
4 answers
2k views

How does VHF/UHF propagate beyond the expected (radio) horizon?

11 votes
3 answers
5k views

Why does "high SWR" damage transmitters, instead of "impedance mismatch"?

11 votes
2 answers
4k views

Why isn't twisted pair used for feedlines?

10 votes
1 answer
2k views

What's the difference between "maximum usable" and "critical" frequencies?

10 votes
1 answer
357 views

What is emissions designator "E" when used as a type of modulation?

9 votes
5 answers
3k views

Why do some straight keys have a slider that shorts the contacts continuously?

9 votes
1 answer
632 views

What changes are being made to the Technician question pool in 2018?

9 votes
1 answer
474 views

Why are radio frequency ranges aligned on multiples of 3?

9 votes
1 answer
2k views

What's this "crossover" toroid winding called and what is its purpose?

9 votes
4 answers
3k views

What did it mean to "align" a radio?

9 votes
2 answers
1k views

Who enacts the FCC's rules and regulations?

9 votes
5 answers
828 views

What limits a PIN diode or varicap from being used in a "Software Defined [Radio] Filter"?

8 votes
1 answer
232 views

What will the *amplitudes* of mixer products be?

8 votes
5 answers
6k views

Should I learn morse at "both" speeds?

8 votes
2 answers
699 views

How to calculate if low-pass filtering is sufficient?

8 votes
2 answers
4k views

Understanding coax radiation and "current on the shield"

8 votes
3 answers
4k views

What exactly is a "balanced modulator"?

8 votes
1 answer
271 views

Is there a practical way for hams to participate in cellular-related technology advances?

7 votes
7 answers
10k views

What is the attraction of vertical antennas for HF?

7 votes
1 answer
238 views

What exactly was a decremeter and how did they work?

7 votes
4 answers
754 views

How can quadrature mixing adjust the phase of all frequencies by the same amount? Can it be done in the digital domain?

6 votes
2 answers
115 views

Can an ultra-wideband system transfer data at high speed without precise clock synchronization?

6 votes
2 answers
4k views

How to measure a balun for effectiveness?

6 votes
2 answers
2k views

How does rpitx generate arbitrary SSB data with a clock peripheral?

6 votes
3 answers
8k views

How should this SWR meter's directional coupler work?

5 votes
1 answer
552 views

What would be the typical received power of an "S9" signal?

5 votes
1 answer
818 views

Why does path loss decrease as frequency decreases? [duplicate]