Fermoy Model Car Club ~ Munster RC Car Club

Lads my new car came with a KO-Propo FET high speed steering servo whish has 4 wires, 3 are terminated with the usual connector but the 4th is on its own, I assume its a permenent 7.2V supply? I read somewhere about a choke wired in series with the supply, can anyone shed some light on this? Kieran. I intend to run it in Lucan next Friday.

Usually there is a blue wire on it with a little Choke on it. That goes to the 7.2v.. But I have read that you can do away with the choke and hook it into the "Red" wire I think. { This is something I must check myself as I have one to fit as well for Lucan  :wink:

Hey,


7.2 Volts servos MUST be run with a choke on the 7.2v supply to the servo.

Choke (inductor not resistor, they look similar) something like this: http://www.modelsport.co.uk/?CallFuncti ... emID=12766


Some speedos  have an extra lead (usually blue) that you can connect up to. If not just connect on to the 7.2V battery connection.


MiCk B. :-)

Hmm,
Strange
I was reading THIS POST

And the poster says it works with only marginal differences on track  :?

Well the post of the other form says: "connect the blue lead from the servo to the red (+ve) lead from the servo and run it on 6v"

Well what that post is talking about is running a servo designed for a 7.2V supply from 6V.

Personally if the servo is designed to run off 7.2V then I'd run it off 7.2V with the choke.

I run a mixture of 7.2V (4-lead) & 6V (3-lead) servos. Any time I use a 7.2V servo it's installed as per the manufacture: blue lead with a choke in-line connected to 7.2V.

MiCk B. :-)

The Full thread was actually regarding a KO PS-713, Which I have myself but need a choke for it.

This is the thread.
 KO PS-713  :?

Personally I would agree with you and run it as per manufacturer.
BUT
In an emergency I guess it would be ok to run it on the 6v method?

Do you have one of those chokes?

Cheers

I'm not going to comment on that :-)



I should have one somewhere in a box, will do my best to locate it. Did the servo not come with one?

MiCk B. :-)

It did but the piece of wire coming out one end has snapped off and i cannot get anything to solder to it now so i want to replace it.
Cheers

What difference does this make to the servo

Faster  :?:

For Lucan I connected the (blue actually its Red) extra wire to the red wire on the connector that plugs into the reciever, I did this after reading stuff on the forums. I dont know what model servo it is as the sticker has come off. I've emailed the original owner to see if he knows. Anyway it worked with no problems!

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