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Looking for emergency communications suggestions
General questions
My daughter and I are investigating getting into amateur radio. I am in New Mexico and she is in ...
  • larry77 asked 3 months ago
  • last active 3 months ago
0 votes
3 answers
3k 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 5 months ago
  • last active 5 months ago
0 votes
1 answer
1k 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 6 months ago
  • last active 5 months ago
0 votes
2 answers
742 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 7 months ago
  • last active 5 months ago
1 vote
4 answers
518 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 7 months ago
  • last active 7 months ago
0 votes
2 answers
3k 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 12 months ago
  • last active 6 months ago
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