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Old 06-08-2007, 12:12 PM   #1
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Default Resistance of Transponder Loop?

Does anyone know what the resistance should be of a transponder loop on a typical RC track?

We're trying to see wether our loop is about to give us problems.

I know it should probably be measured as an impedance but we 'don't have the technology'

Xray T4'18, T4'14 (Wet Car)
Xray X12 2018
Xray X1'16
wlrc.co.uk (West London Racing Centre)
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Old 06-08-2007, 02:11 PM   #2
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With the COAX disconnected you should read 470 ohms on the loop. With the loop disconnected you should read 95-105 Kohms from the center pin of the BNC connector to the outer shell of the connector.

Check out this tread....a little more info there.


Last edited by Ed Anderson; 06-08-2007 at 02:29 PM. Reason: more info
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Old 06-08-2007, 04:30 PM   #3
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...in ten years of putting on racers w/ transponders, I've never used a resistor in the wire, I use 22-24 ga SPEAKER wire, cause it's cheap...

I do replace it EVERY race, but since my races are at temporary locations, it usually is DUCT TAPED to the ground..and at the end of the day, I just rip it up and toss it away.
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