Rufus2010

iTrader: (3)

Good point.

scottgir

iTrader: (157)

Wiring is even easier than what is being described.

Unplug the red and black wires from your servo plug. Solder them onto the MALE end of a balance plug (you can get them on ebay etc.)

Cut the unused wire off the male balance plug, so just the red and black wires will work and plug that into the balance plug of your lipo.

It's super easy and you don't have to change the wiring of your lipo or esc.

Stanfsu

iTrader: (294)

Got it

kevinpratt823

iTrader: (12)

Baahahahah!

gus6464

iTrader: (2)

I have been running a solar D771 off the balance plug of my 2S lipo and so far zero problems. Just make sure the receiver can handle the voltage though. Spektrums can handle over 9v no problem but now I am using the Hobbyking DSM2 Orange ones because they are super cheap and still no issues. It's super easy to make the harness too and really cheap.

Pygmy

I actually bought the Protek 150s because my Radiopost 2207m (Green) stopped working. (Until it did, it was the most awesome servo I've had in any car)
I sent it back to the US (I'm in the Netherlands) for warranty, and Greg of Radiopost emailed me back saying the fact I cut of the standard connector voided the warranty. I explained why I cut off the connector (it's being sold as a high voltage servo, so it would be a waste to connect it to the 6v power of the receiver / esc - I've split the cable to power it straight from the BEC at 7.2v), and Greg / Radiopost seems to agree and they'll repair/replace it under warranty.
If they do - awesome, that's the kind of customer service I'd expect when paying the big bucks for a servo. If not, I'll be back to buying cheaper servo's

virgilj

iTrader: (2)

I just wired up a Hitec 7954sh and my Airtronics reciever to run directly off a 2s lipo. Only problem I had was glitching under hard acceleration and braking. I plugged a glitch buster into the reciever and the problem was solved.

So long as your reciever and servo are both rated for 7.4v it's no problem. Simply pull the red wire from the ESC conector that plugs into the reciever and tape it up. Get a servo extension wire and plug it into the battery conection on the reciever. Cut the other end off the servo extension wire and connect it to the lipo. I soldered mine to the lipo input of the ESC because it was handy. Your reciever and servo are now running off the lipo and the BEC of the ESC is not being used.

CagomoC3

iTrader: (5)

Then it should be okay other wise use a cap. I use caps no matter what it says. example 2s lipo to 4ch receiver rated 7.2-9.4v out to servo rated at 7.4v then rx out to esc rated at 2-3s lipo then rx out to glitch cap then rx out to mylaps. no issues.

also on my special sc I use 2 receivers rated at 7.2-8.4v binded together on one tx. example : 2s lipo to rx1 then from rx1 throttle input to rx2 which esc is on with 2 glitch cap in aux1,2. no can do this I have the secret formula.

BOLISARIO

iTrader: (57)

Sorry to bring this old thread back up...... I'm new to directly powering HV servos, but what happens when you near the end of your run and the lipo voltage drops? Does the servo start to slow down and affect performance or will it work at peak specs throughout the pack? Will you also start experiencing glitching issues?

SouthFloridaApp

iTrader: (6)

This is a little off topic, but somewhat related. If one is NOT having glitching problems would running a glitch buster result in a smoother throttle/brake feeling?

rcgod

iTrader: (33)

I would say it's possible to feel the servo slow down if you run your car down to lvc, but I've never felt a drop off running a regular 5-7 minute race in my scte. The difference between fully charged and lvc is usually about . 04 sec response time on the servo, so you would have to be pretty sensitive to feel that. But yes it's possible.

Cantabile

iTrader: (3)

how to know red or black wire goes to which side of the male balance plug please?

Dave H

Technically it does, but I also doubt if it's much of an issue. I used direct powered KO servos for years with nicads that dropped off a lot more during a run than lipos, can't say I noticed a big difference, seemed fine. Some may be more sensitive of course.

Plenty of nitro guys run direct lipo servos, long races, while I haven't searched for concerns I've never heard of any either.

Although it is a legitimate point. Personally I'd try it with a simple direct connection, see it appears to be an issue, before adding the complexity of a regulator or external BEC to try and make it more consistent.