On Thursday, May 19, 2016 at 7:06:35 PM UTC-7, son_of_flubber wrote:
On Thursday, May 19, 2016 at 1:34:45 AM UTC-4, wrote:
If others have transmit range issues, then consider ohming out your antenna and check for a short.


What should the ohm readings be for healthy Flarm antennas?

Measuring from the coax connector center pin to the outer housing, should read open or infinite ohms.

To check the antenna without an RF type SWR meter, you would need to either remove the vinyl caps on the radials (if it's a dipole antenna) and measure those. One should read a short to either the coax center pin or outer housing, and the other radial should be a short to the other part of the coax fitting. It's a simple antenna with no loading coils or baluns etc.

If working on avionics a lot, there are testers like this available: http://www.mfjenterprises.com/

bumper
MKIV & QV