R1 495.00


On this new version, the LED flashes twice when it’s powered up to show it’s the NS version and works with the new mylaps RC4 decoder, old MRT transponder comes on with no flash.

These transponders from MRT are lightweight and small in size.

The PTX ID number of each transponder can be changed by use of a ‘setup’ button (20 alternative ID numbers are available). Each individually numbered transponder has its ‘custom’ ID number written on the supplied instruction sheet with the 20 alternative numbers also listed as two sets of 10 ID’s.

PTX transponders are supplied with 20 stored ID numbers and come factory set on the custom ID. By pressing the setup button it is possible to switch from the custom number to the other numbers if required. To use the PTX it should be connected to a power socket on a receiver or to a battery pack. The LED will light up to show the transponder is operating. When setting the number (or checking the number that is set) the LED will flash to show the number selected, or the number that has been set.

Weight: with the long power lead and mounting tabs as shown below is 5 grams.

Out of stock

SKU: MRTPT01 Category:


MRT mPTX and PTX (NS) transponders are compatible with all AMBrc

systems and the new RC4 system. [old PTX Read Article PTXTIU0117]

Polarity of plug connection can be reversed without problems, but when

resoldering power lead wires to mPTX circuit board check the polarity.

Fast flashing LED – refer to instruction sheet supplied with transponder

The instructions describe what the LED flashes are indicating, it’s warning that the location of the transponder is weakening the signal (nothing to do with changing to the ALT ID). The signal is still being transmitted, the laps will still register, but some may be missed due to the attenuated weakened signal. It’s not a good idea to mount a transponder direct on an alloy or carbon fibre chassis, it should be mounted either above or ideally off to the side of the chassis using a transponder clip or mount. It’s ok to leave it in it’s current location, but it would be better to relocate to stop the warning flashes and maximise the signal received by the decoder.

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