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3 answers
125 views
Placement of antenna transmission line
General questions feedline
I have been using a long transmission line. I connect to the antenna and my transceiver. I then t...
  • KC3LUE asked 2 weeks ago
  • last active 2 weeks ago
0 votes
1 answer
218 views
Intentionally stalling a stepper motor
General questions loop antenna   stepper motor   intentional stall
I am building a loop antenna using a vacuum variable capacitor adjusted by a stepper motor. I wan...
  • wa3ltj asked 2 months ago
  • last active 1 month ago
0 votes
2 answers
341 views
How can I measure the rotational force needed to adjust a vacuum variable capacitor?
General questions mechanical coupling   loop antenna   variable capacitor
I just ordered a vacuum variable capacitor to continue my experiments with loop antennas. This on...
  • wa3ltj asked 3 months ago
  • last active 1 month ago
1 vote
4 answers
264 views
Are these radials or counterpoises at the base of an attic Vertical?
General questions
I have an attic vertical with four 1/4 wave wires extending in 4 different directions horizontall...
  • w4nta asked 3 months ago
  • last active 3 months ago
0 votes
2 answers
2k views
What empirical evidence, or physics explanation validates the choice of transmitting from a valley, slope or summit?
General questions propagation   conductivity   take-off angle
If a take-off angle is e.g. 20-degrees, so long as the wave clears the obstacle ahead, say anothe...
  • Jim asked 8 months ago
  • last active 2 months ago
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