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Old 10-07-2004, 09:18 AM   #1
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Default Help with KO Propo Servo wire

Guys
I picked up a fast KO servo on Ebay. It has an extra blue
wire in addition to the std three wire plug.

I understand I have to connect the blue lead - but where and how?

The servo doesn't work with my futaba system - but I hear you have to energize the blue lead - and the instructions are a little
un clear

thanks
bill
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Old 10-07-2004, 09:24 AM   #2
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That's the wire you connect to you speedo so the servo can function in 7.2v mode, without connecting that wire and just plugging your servo in to the receive, it won't work.

If you are connecting it to a non-KO speedo, you'll need a little capacitor in-line, at least that's what it says on the servo manual.

Dom
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Old 10-07-2004, 09:33 AM   #3
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Default Connect it where - to what on the ESC?

Sorry for my lack of insight - but that must be what the capacitor in the box is for - but if I solder the lead to the capacitor...then where would ya wire the capacitor into the esc?........red positive at the plug?

does the capacitor have polarity - does it matter which way, which end?

thanks
bill
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Old 10-07-2004, 09:39 AM   #4
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Sorry Bill, kinda forgot to answer an important part of the question....

What speedo are you using? And NO, NOT the positive wire or positive plug wire on your speedo. Say if you are using a Novak speedo, there should be a short blue wire just "hanging" there by the receiver plug wire.

As far as polarity, I'm not sure, I'll have to read the manual. I use KO speedo so I didn't have to use the little capacitor.

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Old 10-07-2004, 09:42 AM   #5
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It does'nt matter, you can solder the blue fet lead to the speedo positive tab or the blue wire coming from the speedo if you have it.
I think You will find it is a resistor not a capacitor, no polarity
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Old 10-07-2004, 10:18 AM   #6
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It is not a resistor or capacitor. It is an inductance 4.7 uh
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Old 10-07-2004, 10:26 AM   #7
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Default Thanks

Ok - I'll either connect to the loose hanging blue wire
or the positive lead

I always wondered what the blue wire was for on an ESC
I thought it was for the braking lights or something

thanks
bill
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