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#21
11-08-2009
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#22
11-08-2009
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the chance of a PT-number-clash is very slim. And if it does, it's almost certain that it will be with someone with another MRT-pt, as MRT ONLY uses the PT-numers THEY possess.
You CANNOT clash with someone else who has an AMB-PT!! So it would not be difficult to agree with the other person on who of the two will change his pt-number with a simple click on a button. Other advantage: The MRT-pt uses less volt. It sometimes happens that at the end of a heat, the voltage drops when you open up the throttle 100% en de ESC demands a lot of Amps. In such a case, it could happen that the PT does not have enough Voltage left and will miss a lap when it passes the antenna. (when a AMB- or MRT-PT passes the antenna under the track, it registers the antenna (which sends out a signal) and in return answers with his PT-code. When not enough voltage, the PT is not capable to emit his pt-code) As the MRT-pt runs on less voltage, the chance of missing a lap is strongly reduced. Also, the MRT is smaller and can be much more easely repared in case of damage on the PT-casing or the wire. I own both an AMB-pt and an MRT-pt (which has the cloned number from the AMB-pt ... so both with the same pt-code). The AMB-pt is a very nice product. Technically well build, good technology. But the MRT-pt is no less AND cheaper! Ever heard of a certain Marc Rheinard ?   He runs an MRT-pt also. And those guys don't take any risks. About being out of stock. MRT just can't keep up with demand  Best is to give them a ring, in the morning. You'll get some direct answers.
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#23
11-08-2009
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The MRT PTx does use the same number system as the AMBRc system, and MRT do not 'possess' any numbers. Only AMB know which have gone, and which to use, therefore a clash could happen between an AMB transponder and a MRT transponder.
However, there are 7^10 possibilities (282475249) for the PT number (7 places, any one of 10 numbers can fill each space), so incredibly unlikely that there would be a PT clash. Even then, there are only 10 per heat, and 10 per final, so at a meeting, it would be unlikely they would be in the same heat, and race control could probably work around it.
__________________
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#24
11-08-2009
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If I buy an AMB-transponder, who does "own" that pt-code then? AMB or me?
IMHO, it's me. I also should guess that AMB knows which pt-numbers it has allready used and will not produce two pt's with the same number. MRT uses the AMB-numbers of the AMB-transponders they own. They got these numbers by buying AMB-pt's, or from donated AMB-pt's they received from customers (in return to a price-reduction for the MRT-pt). So MRT will not use a AMB-number they do not "own", from which they do noy have the AMB-pt in their possession. That's also why, when you let them clone a pt-code-number, you have to send in your AMB-pt, so that they can read it out, AND to asure them that you actually are the owner of that pt. Also, that particular code, will and can only be used in the MRT-pt's they produce for that owner. So, a clash can not occur with an AMB-pt ... unless someone sold his cloned pt or the pt that has been cloned, which MRT very clearly mentioned NOT TO DO.
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#27
12-08-2009
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Our club brought Batleys old AMB transponder system a couple of years ago. We are unable to use PT's with it. Our handout tranponders are the red cased ones so i presume its the AMBrc system. I was thinking of buying a MRT PT with the preset numbers, does anyone know if it will work with our timing system?
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#28
12-08-2009
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#29
12-08-2009
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Im not sure if they have. there are a couple of guys there that have AMB PT's and there unable to use them. Could it have something to do with the software? Im not sure what software we use either but i do know its free.
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#30
12-08-2009
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#31
12-08-2009
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I take it the MRT PT's with the preset numbers clone the AMB handout numbers? Will have a look at what software we are using on Friday night. I do know that Batley wasn't able to run PT's either, think that might been the reason for them selling it. I could be wrong tho.
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#32
12-08-2009
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Steve... the transponder system is AMB20 that we use at cullingworth. As far as Im aware you would need a different decoder to run PT's
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#33
12-08-2009
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Oh and the software is laps free
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#35
12-08-2009
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exact. AMB has develloped the AMB20-system. with this system comes a decoder that can read the numbers of the pt's.
It can only read those 20 transponders. (numbered from 1 to 10 or 20 and also called "clubtransponders") Later on AMB developped a new system, capable of reading out transponders with a longer number/code: the Personal Transponders as everyone can buy one and have a specific, own personal code/number. For these transponders, a different decoder is needed then in the first system. (one of the systems is digital, the other analog, I believe). SuperSparkSteve, from what you told, I suppose your club has the older AMB20-system. This system can not read ANY type of Perosnal transponders. However, MRT is also capable of providing you a (set of) AMB20-type clubtransponder(s).
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#36
12-08-2009
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Thanks for all the info guys. Our club transponders must have been serviced and re-cased as Sosidge says.
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#37
12-08-2009
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I've heard on another forum of a club that switched their totally used AMBrc-clubtransponders for two sets of 10 MRT-pt's.
AMBrc-clubtransponders have a battery. (MRT can switch these batteries also for you, if the batteries are at the end of their lives.) The MRT-pt's have a power-wire, so now someone who uses one of their Clubtranponders will have to connect that powerwire to their receiver. And to make things clear, they just gave every of their two sets a color, by spraying a fluorescent color on them. Whenever the color has weared out to much, they just spray some new paint on them. These pt's don't have to be beautifull, but usefull! It works like a charm and was MUCH less expensive then a new set of AMBrc-clubtransponders (which, AFAIK, are much more expensive then regular AMB Clubtransponders). If you wonder ... I have no connection with MRT, except for the fact that I bought an MRT-pt, but I contacted Tony from MRT by phone when I was looking for info for an RC-club I knew that were looking into the possibility to buy MRT-pt's to replace their AMB20-system. SO I digged into the matter and phoned MRT a couple of times. Also, there are some threads about MRT-pt's on the RCtech.net-forum
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#38
13-08-2009
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I would love the club I race at to have a transponder system. All very interesting reading and from what I understand these systems cost a small fortune.
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#39
13-08-2009
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there was a club setup on ebay earlier today. can't see it now so it must have ended so can't say what it went for.
the Ludlow club that I've been going to since I was 10 (17 years ago) has always used amb transponders. they had the 10 red 10 yellow ones when I started and now just have 10 with the red cases. A lot of racers have the ambrc PTs in their cars. I just bought one as after 17 years of racing 'forgot' to put a transponder in my car for round one... it just didn't cross my mind lol
__________________
 CML Distribution - Distributors of Quality Radio Control Models & RC Hobby Products
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#40
13-08-2009
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It went for about £300, but not being the man in charge at the club I didn't bid..
I'm wanting to do a regional at some point so will be getting a couple of PTs I expect
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