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hjf
  • Member for 5 years
  • Last seen more than a month ago
11 votes
4 answers
3k views

Is "low loss" cable required for HF?

10 votes
4 answers
7k views

Real world performance of magnetic loop antennas?

7 votes
4 answers
4k views

Antenna options for a 10x20m property with a large metal roof?

6 votes
2 answers
961 views

Multiband vertical antenna not working as expected

6 votes
2 answers
5k views

Base vs center loading a vertical antenna

5 votes
3 answers
1k views

Only noise, no signals whatsoever on HF

5 votes
5 answers
754 views

Is "coil loading" a type of impedance match?

4 votes
3 answers
98 views

What kind of antenna for an automatic high bands monitoring station?

4 votes
0 answers
594 views

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

4 votes
1 answer
519 views

Using a trap out of its resonance frequency?

4 votes
2 answers
204 views

Basic antenna matching theory?

4 votes
2 answers
1k views

Does a dipole require a 1.5:1 balun?

3 votes
0 answers
216 views

Circular polarized antenna feed changes as I rotate it?

3 votes
1 answer
782 views

Bias Tee for HF: noise and losses?

2 votes
1 answer
5k views

how does this collinear antenna work?

2 votes
0 answers
603 views

Vertical antenna near power and cable lines

2 votes
2 answers
2k views

Yagi: split or solid driven element?

2 votes
1 answer
548 views

How to model my rooftop vertical on 4NEC2?

2 votes
1 answer
2k views

300 ohm to 50 Balun at antenna feedpoint, or near receiver?

2 votes
2 answers
2k views

How to estimate a dipole feedpoint impedance?

1 vote
1 answer
333 views

Grounding for an upper floor shack

1 vote
0 answers
487 views

Extremely strong QRM on VHF?

1 vote
1 answer
269 views

Modeling a multiband Yagi in 4NEC2?

1 vote
2 answers
261 views

Amplified RX-only loop antennas for DX operation?

1 vote
1 answer
2k views

How does an Airspy HF+ Discovery compare to a "real" radio?

1 vote
1 answer
492 views

Yagi performing far worse than a dipole

0 votes
2 answers
362 views

Built-in ATU vs Remote?

0 votes
1 answer
140 views

What is the effect of coil Q on a shortened dipole?

0 votes
3 answers
2k views

To folded dipole, or not to folded dipole?