View Full Version : AMB loops


jack
11-15-2006, 02:22 PM
Hi all, Does anyone know what is in the two small black boxes that are attached to an AMB loop? The reason I ask is because I need to make a second loop and I want to know if they are for anything special or if they just separate the loop ends.

Thanks
Jack

NCFRC
11-15-2006, 03:22 PM
I believe there's two small resistors to help balance the loop , we've had to replace ours and I know we went to R shack and got them .

You'll have to contact AMB or I'd just snap the box open and measure the existing ones.

We've run a small 1/18th scale loop with just wire and it worked fine.

1/10th scale , make sure your loop is 12-18 inches apart.

jack
11-16-2006, 12:29 PM
I tried to open the black boxes on the loop however they are filled with some type of glue or something. Do you remember what size the resisters are?


Thanks
Jack

NCFRC
11-16-2006, 05:01 PM
Sorry I don't but maybe AMB would tell you vs. buying another loop.

OvalmanPA
11-16-2006, 10:10 PM
Personally I wouldn't worry about it. Get some 18ga speaker wire and separate the halves and you're set to go. We've been doing this for a few years now without any problems. No real need for the resistor from what I've seen.

swtour
11-17-2006, 12:44 AM
Jack,

I run a travelling series and have to use temporary loops. I use the thinnest speaker wire I can find so it doesn't create a huge bump on the track (I duct tape it down.)

On the end of the Yellow CoAx cable I put alligator clips, and I just bare the end of the speaker wire and clip the alligator clips to it. NEVER had a Loop problem (Did the same thing with the old AMB20 system)

I don't seperate the wire, I use both strands, this actually gives a little bit of a safety net if the loop wire gets cut.

I buy a new roll for each race (It's just a $5.00 expense I add to the expense of racing list)

The longest loop I use is on our Bicycle velodrome which the track is about 30 ft wide, so the loop wire would be about 63 ft. long total.

Tres
11-17-2006, 10:01 AM
Jack was that you on Inside RC?

swtour
11-18-2006, 12:11 AM
Tres,

That was ME on "Inside R/C" on the Velodrome show.... The FAT Guy with the LOUD Mouth in the announcer tower.