AMB Timing loop

Old 10-02-2004, 02:57 PM
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Default AMB Timing loop

I have a question for anyone who has built a timing loop for and amb system. I am putting a loop in for a new track but the track changes from 8 foot lanes for road course to 10 foot lanes for oval. How can I build the loop so I dont have to buy two loops?
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Old 10-02-2004, 03:03 PM
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If I understand you correctly, you have 2 different options, and the timing loop will be in 2 places? If so, don't run it under the track, make a "bridge" about 12ins wide, 2 foot high and if it's made of thin wood / perspex, won't interfere with the drivers view of the car. This could be made adjustable with a hinged portion to extend for the wider track.
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Old 10-02-2004, 04:13 PM
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I would say make it out of pvc, and with that, you would be able to add extensions to one end to make it just 2 feet longer. But But i would also say, make it about 2 feet high, and 12 inches wide.
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Old 10-02-2004, 04:58 PM
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Just buy a second loop
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Old 10-02-2004, 09:45 PM
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We already have a bridge loop that can change from 10 to 8 feet, just thought it would really clean the track up putting it under the carpet.
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Old 10-02-2004, 11:01 PM
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whoa!!! I'll find out the resistor to use but just put down 18ga speaker wire and put the resistor that i'll find the part number for from radio shack! like $2 you can have as many loops as you want and you won't pay $300 from AMB
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Old 10-02-2004, 11:32 PM
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Originally posted by JimMcClure
We already have a bridge loop that can change from 10 to 8 feet, just thought it would really clean the track up putting it under the carpet.
Under the carpet is better than on top of it. However, you may need another loop if you are going to do oval.
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Old 10-03-2004, 07:28 PM
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Yeah nashrcracer, If you could find out what is at the end of the loop that would be covered by the carpet that would be great. I was thinking it was a diode but that was just a guess.
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Old 10-03-2004, 07:35 PM
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At the end of the official AMB loop is a resistor (i.e. the little black box). You could go to rat shack and get one but the cool thing is you don't need it. Just run cheap 14 guage wire. It will work fine.
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Old 10-03-2004, 07:59 PM
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Look on www.sgrid.com, Nitro Offroad Racing, item #200. I think I remember people saying the new loops from AMB no longer have a resistor. Just use 18 ga. wire or so.
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Old 10-03-2004, 08:23 PM
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WE have the newer amb system and we run 2 loops under the carpet for road and oval tracks as well as a 3rd loop that goes to our micro track. ITs simple speaker wire and we used deans connectors to attach each loop separately at the main amb wiring. We run oval and micro on 2 tracks on the same night.
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Old 10-03-2004, 08:26 PM
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Update: on our micro track we went under the carpet but we plan to change it to a bridge over top because the wire is noticable when the cars run over it. Its not major but it is annoying
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Old 10-05-2004, 06:35 AM
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Joel Lagace: do you use the same coax and black box?
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Old 10-05-2004, 07:08 AM
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Post Bury the loop

At the "Gate" in Cleveland, we buried the loop by using a router to cut a small slot for the wire. I don't know what surface you have below your carpet, so that might not work. We have our carpet laid on vinyl tiles. Just a thought!!
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Old 10-05-2004, 03:35 PM
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If you go to Radio Shack, get 18 gauge speaker wire and a pack of 5 watt, 420 ohm, 1% tolerance resistors. It will cost about $3 for everything. This is what I have run at our track for the last 7 years because I tilled up our original loop by accident, and we have never once had trouble with it. If you look in the AMB Manual, these are the specs they give for the loop and resistor.
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