 |
|
|
||||
|
|
|
|
||
FAQS | R/C SWITCHES Why are your wire cables twisted? When the wires are twisted, wrapping the + and/or signal lead around the ground wire shields the wiring from pick-up of electrical noise and reduces the chance of glitches. This is so effective that you usually can dispense with using chokes, beads, toroids, and the like on the cables.Are your connectors gold plated? We use gold plating, not flashing, on our connector pins. All connections are machine crimped. We have our own proprietary connector shell quick grip disconnects molded on so you can grip the shells without pulling on the wires. Pin retention is so strong that you can pull hard enough on the wires to break them without the pin pulling out of the shell.Do your cable connectors work with my (O.E.M. brand) radio? Yes. We offer our extensive line of wiring with polarization shells for Futaba and JR. Three years ago, Airtronics switched to the Z-style connector so a JR servo shell can now be used for all radios. After three years, we have finally discontinued stocking the old Airtronics shells. The main thing to remember is that the old style Airtronics had the red and black lead (+V and ground) reversed from all others. Please read the small printed sheet in with the connectors that shows you how to make the conversion. In a related matter, remember that JR has their transmitter charge connections reversed from all others.Do you sell noise suppression devices? No. We have generally found the twisted wiring to be more effective. If you want to avoid the problems or reduce your concern for them, mount all servos with the original eight to ten inch length cable and use a pull-pull cable system to reach the control surfaces. That way, you don’t change the counterpoise to the dipole antenna in your receiver and unbalance the tuning. This is the reason all FMA Direct receivers use a 50 ohm impedance match with the antenna so it is not nearly so susceptible to the length of the servo wires. I have seen very expensive PCM radios confounded by this problem.Can I make my own cables? Yes, we offer exceptional quality wire made here in the US. The Powerline wire is made up of 150 strands of #44 wire to form the equivalent to 22 gauge wire and is extremely flexible. Our microlite wire is 65 strands of #44 wire in the equivalent to 26 gauge. Both types and the polyethylene sheath are sized to permit secure crimping in our connector pins using the CEL 1179 crimping tool. Quite a few people want to make their own cables so they can custom fit them to the dimensions they want, even though we have a large number of cable lengths. We sell all the components you need to make your own cables, including the crimp tool. You may buy individual pins (SERVOPIN for the female pins and CHPIN for the male pins). The servo and battery cables use SERVOPIN and charge cables and extensions use CHPIN. The female SERVOPIN fits into the SHELLSE (Shells -servo) and the male pins go in the SHELLCH (Shells - channel). If you buy them as complete sets of three pins and the mating shell, the SERVO set is SEASSY and the channel set is CHASSY. You need a male set and a female set to make an extension. If you choose to manufacture custom cables, it is highly recommended that you solder the wires into the pins in addition to crimping to ensure you have a solid connection. FMA Direct will not warranty any items used in custom manufactured cable assemblies. 
SHOPPING CART | HOME | SPECIALS | JOIN EMAIL FMA Direct • 5713 Industry Lane, Suite 50 • Frederick, MD 21704 800.343.2934 • Fax: 301.668.7619 • Tech/Service: 301.668.4280 |