BBerson
Light Plane Philosopher
I have an old Narco 810 Com radio. Other pilots will sometimes tell me the transmission is weak, other times they say "loud and clear". So I decided to do some simple testing with an ordinary multi-meter.
I first disconnected the antenna cable and checked the antenna and cable for internal shorts. None found, the ohm meter did not move with one lead on the center wire and the other test lead on the external connector.
Then I removed the radio and tested the radios antenna output wire with the ohm meter and found the meter went over to zero ohms, as if it had a dead short inside. I tested a couple of other radios and they did not test this way.( no indication at all on other radios)
Is this a good way to test a radio?
It still works, even with a dead short apparently. How can it work at all, I am wondering?
thanks
BB
I first disconnected the antenna cable and checked the antenna and cable for internal shorts. None found, the ohm meter did not move with one lead on the center wire and the other test lead on the external connector.
Then I removed the radio and tested the radios antenna output wire with the ohm meter and found the meter went over to zero ohms, as if it had a dead short inside. I tested a couple of other radios and they did not test this way.( no indication at all on other radios)
Is this a good way to test a radio?
It still works, even with a dead short apparently. How can it work at all, I am wondering?
thanks
BB