Phil Frost - W8II's user avatar
Phil Frost - W8II's user avatar
Phil Frost - W8II's user avatar
Phil Frost - W8II
  • Member for 8 years, 11 months
  • Last seen more than 1 year ago
  • United States
22 votes
2 answers
17k views

What makes a 5/8 wavelength vertical desirable?

20 votes
3 answers
3k views

I hate contests. How can I avoid them?

19 votes
5 answers
15k views

Why do folded dipoles have greater bandwidth than ordinary resonant dipoles?

17 votes
2 answers
6k views

Is free space path loss dependent on frequency?

16 votes
2 answers
4k views

How does one read a ferrite datasheet?

14 votes
4 answers
8k views

What does the addition of a shield to a small loop accomplish?

14 votes
5 answers
6k views

How does a folded dipole work?

13 votes
3 answers
5k views

Is a vertical noisier than a dipole, and if so, why?

13 votes
1 answer
1k views

How can I calculate the effects of an LNA, antenna gain, etc. on noise performance?

12 votes
5 answers
1k views

How does an antenna transform impedances along its length?

11 votes
1 answer
2k views

Why is dynamic range relevant for an SDR?

11 votes
6 answers
305 views

Practical limits to maintaining coherence in an HF channel

10 votes
3 answers
959 views

Why are germanium diodes specified in amateur radio designs?

10 votes
2 answers
3k views

Do FCC regulations limit digital data rate?

10 votes
1 answer
282 views

Why do we use decibels in radio?

9 votes
4 answers
6k views

What's the difference between "minimum SWR" and "resonance"?

9 votes
2 answers
2k views

How might one realize a first order, two dimensional RF field antenna for HF?

9 votes
2 answers
430 views

Is steel or aluminum structurally a better material for catenaries?

8 votes
6 answers
8k views

Why is antenna aperture a function of wavelength?

8 votes
1 answer
4k views

What's an appropriate core material for a loopstick antenna?

7 votes
1 answer
5k views

How can a quarter-wave transmission line transformer be implemented with lumped elements?

7 votes
5 answers
911 views

Is a 5 watt UHF/VHF handheld considered QRP?

6 votes
1 answer
182 views

Has an amateur radio communication ever taken a path outside the Earth-Moon system?

6 votes
6 answers
373 views

Does an SWR higher than 1:1 necessarily cause additional heat in the transmitter?

6 votes
3 answers
376 views

What is a "direct sampling superheterodyne" receiver?

6 votes
4 answers
1k views

Can a common-mode current exist on the inside of a coax shield?

6 votes
3 answers
5k views

What is dB(μV/m), and what are its applications?

6 votes
1 answer
384 views

Why is the neper a useful unit for transmission line calculations?

6 votes
1 answer
408 views

Are some ferrites porous enough they should be protected outside?

6 votes
2 answers
742 views

Filtering for PSK31 demodulation