Originally Posted by ta_man

The answer to that is simple: multiple transponders with the same number make it easier for a racer with more than one car.

I race at a club that runs lots of classes. Now that I am getting older I only run 5 classes a day (we only one qualifier before the main). In the past I have run as many as 7 classes in a day when we had 23 heats per round. For the past 3 years I have only had to remember two numbers for all those cars. That, and only that, is the reason I owned MRT transponders.

When our club upgraded to RC4 I sent my 9 MRT transponders in to get 9 pure RC4s. I picked out two numbers out of those 9 that were easy to remember, and got 3 (soon to be 6) CarID transponders. I sold 5, and will soon sell the remaining two of the 7 who's numbers I didn't "like." I sold them for $88 (the lowest price I found anwhere else for brand new ones) each, paying 92.50 (shipped) for the CarID transponders. I feel the $4.50 premium to get the CarIDs after selling the other RC4s is worth it to me to have less numbers to remember.

If that's hard for you to understand, maybe it is because you have a photographic memory.

If AMB had offered multiple transponders with the same number before MRT did, I would not have bought the MRTs. MRT offered a service AMB refused to offer at that time.