Phil Frost - W8II
  • Member for 8 years, 2 months
  • Last seen more than a month ago
  • United States
2 answers
22 votes
16k views
3 bookmarks
What makes a 5/8 wavelength vertical desirable?
3 answers
20 votes
2k views
2 bookmarks
I hate contests. How can I avoid them?
5 answers
18 votes
15k views
1 bookmarks
Why do folded dipoles have greater bandwidth than ordinary resonant dipoles?
2 answers
16 votes
6k views
5 bookmarks
Is free space path loss dependent on frequency?
2 answers
15 votes
4k views
2 bookmarks
How does one read a ferrite datasheet?
4 answers
14 votes
7k views
1 bookmarks
What does the addition of a shield to a small loop accomplish?
3 answers
13 votes
4k views
2 bookmarks
Is a vertical noisier than a dipole, and if so, why?
5 answers
13 votes
5k views
2 bookmarks
How does a folded dipole work?
5 answers
12 votes
1k views
2 bookmarks
How does an antenna transform impedances along its length?
1 answers
11 votes
1k views
1 bookmarks
How can I calculate the effects of an LNA, antenna gain, etc. on noise performance?
2 answers
10 votes
2k views
Do FCC regulations limit digital data rate?
6 answers
10 votes
279 views
2 bookmarks
Practical limits to maintaining coherence in an HF channel
1 answers
10 votes
2k views
1 bookmarks
Why is dynamic range relevant for an SDR?
3 answers
10 votes
918 views
Why are germanium diodes specified in amateur radio designs?
4 answers
9 votes
5k views
What's the difference between "minimum SWR" and "resonance"?
2 answers
9 votes
421 views
1 bookmarks
Is steel or aluminum structurally a better material for catenaries?
2 answers
9 votes
2k views
2 bookmarks
How might one realize a first order, two dimensional RF field antenna for HF?
1 answers
8 votes
234 views
Why do we use decibels in radio?
1 answers
8 votes
4k views
What's an appropriate core material for a loopstick antenna?
1 answers
7 votes
5k views
1 bookmarks
How can a quarter-wave transmission line transformer be implemented with lumped elements?
5 answers
7 votes
876 views
Is a 5 watt UHF/VHF handheld considered QRP?
6 answers
7 votes
7k views
3 bookmarks
Why is antenna aperture a function of wavelength?
6 answers
6 votes
249 views
1 bookmarks
Does an SWR higher than 1:1 necessarily cause additional heat in the transmitter?
3 answers
6 votes
180 views
What is a "direct sampling superheterodyne" receiver?
4 answers
6 votes
705 views
Weather-proofing antenna connections
2 answers
6 votes
5k views
1 bookmarks
How does a folded balun work?
1 answers
6 votes
331 views
Why is the neper a useful unit for transmission line calculations?
4 answers
6 votes
1k views
1 bookmarks
Can a common-mode current exist on the inside of a coax shield?
2 answers
6 votes
682 views
1 bookmarks
Filtering for PSK31 demodulation
1 answers
6 votes
357 views
Are some ferrites porous enough they should be protected outside?