Receiver battery

[Hurricane]

I use a JR1 spetrum radio sytem and run 1/10 scale hydros. Using 4s pack with 6 volt rec. battery. I bought a 7.4, 350 mah 2s rec. battery and told I didn't need to use a rvoltage regulator. The next guy differant hobby shop said I need the regulator. I get a differant answer every time I ask. The total is now 5 said I need a regulator and 7 say I don't. Who is right? I don't want to burn up the rec. Thanks, Ron

 

[BulletMaster]

you definately need to use a voltage regulator. If not for the rx, definately for the servos.

 

[jayt]

You may not need a regulator for just 7.4 volts. It depends on your receiver, some will regulate up to 8.4 volts - and some receivers regulate the power to the servos too. Current JR receivers say use 4.8-6.0 volts. Futaba says 8. 4 volts maximum. I used 9.8 volt receiver batteries for years with Futaba and HiTec receivers and servos, never a problem - but that was then. I use 6.0 volts now. B)

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[BulletMaster]

well, for the sake of about $20, why not just install a regulator? At the very least, it will ensure a consistent voltage to your rx system.

I am using XtremeLink in my boats - the rx will take up to 30V, but the servos are the limiting factor. The rx doesn't regulate the output voltage. It's just a simple +ve and -ve bus arrangement (much as most rx's out there).

 

[BACKEMF]

I my personal opinion KISS. I use 4.8 & 6.0V Nimh packs in all my boats. IB 1400s last 4 ages, can deliver 30 amps cont., easy to care for (I abuse mine), are cheap and do not require regulators.

Adding more components increases possible failures, always. Just like a car with electronic options. Have you ever seen a hand crank fail before electric window mechanisms? rare, maybe on a Skoda.

I use 4.8 volts for one boat on purpose because I choose to run a water proof high torque futaba 9206 steering servo which can ONLY run on 4.8v spec. by Futaba. Some servos may say they can run on 6v but burnout prematurely.

I have just retired my 4 year old green GP750's this winter.

Investing in quality Deans micro connectors instead of futabas stuff helps alot too, less contact corrosion.

 

[Glenn Quarles]

I have been running the 2s lipos without a regulator in several of my boats for for a couple of months now and I have had no problems. I have both JR and Futaba receivers with several different brands and sizes of servos.

Glenn

 

[Bill-SOCAL]

The major issue with unregulated 7.4 volt power is not the receivers. They have their own internal regulators. It is the servos. The higher voltages will make the servos faster, have greater torque, and wear out faster. How fast they die is the issue. Sometimes it is a short time, sometimes a longer time. But neither JR not Futaba recommends anything above 6 volts for extended use.

So it will work, the question is how long.