3500G voltage stepdown

[rcbirk21]

I am running a g770 gyro with the 3500G servo, and z3650's on cyclic. I am running the cyclics at 6v, but the 3500G can only run at 4.8v. Align makes a stepdown for 5.1v, but I dont think that will work. Spektrum also makes one, but it is $30, compared to the align which is $4. Is there any cheaper alternative to the spektrum? Or maybe something that is a little better or any other options PERIOD?

[huskynox]

The 5.1v is made for a 4.8v servo.....

Remember when you have a 4 cell nimh pack fully charged it's well into 5v. That's what these servos are all rated for (nimh batteries).

[rcbirk21]

OK, i just wanted to double check. I did not want to fry an expensive servo. Thanks for your help

[rcbirk21]

That align regulator is out of stock everywhere. Can anyone find it in stock or a suitable cheap replacement for it?

[oteskate]

Jeremy over at www.rchover.com has them in stock.... or he did as of last week.

[Pinecone]

Also, I talked to JR rep at Toledo show and 3500G is fine on 6 votls REGULATED, but it is not OK to run on 6 volt pack (5 cell = 7 volts or so fully charged).

[rcbirk21]

So if I am running a 3500G on my trex 500 with the 6v regulated through the ESC, then I am fine?

[Pinecone]

According to the JR rep I talked to at Toledo, YES.

[rcbirk21]

Now if something happens to my servo, will this void the warrenty? Also, is this going to effect my servos life span?

BTW, horizon servo support stinks. I knew more than them by reading what the servo description says.

[estevens]

Isn't it strange that the 3400G and 3517 servos have 6 volt ratings, but the 3500, which is basically geared a little faster, can't run on 6 volt?
The step down is basically a diode which gives a .7 volt drop down from the 6 volt regulated to give you 5.3 volts. That's why most of the step downs can only be used with a regulated 6 volt input otherwise the tail servo voltage would drop to low as the pack voltage came down.

[Pinecone]

Not strange. As you gear for more speed, you decrease torque and load the motor more.

Think of a manual tranny car. If you need power (acceleration) you use a lower gear, which isn't good for much speed. For speed, you use a higher gear, but one that will bog when starting out.

[rcbirk21]

Bottom line. Do i need the regulator or not?

[oteskate]

I would run one just in case. I have one on mine and if you go to the website and do any research on the 3500, they do not list any specs for 6V. There must be a reason, so I would just play it safe and use the step-down. Why press your luck and then have to deal with sending stuff back or buying a new one. Not worth it IMO.

[Pinecone]

Remember, in classic RC, 6 volts means a 5 cell NiCd or NiMH pack. They are nominally 6 volts, but fully charged are almost 7 volts.

Regulated 6 volts, is 6 volts all the time.

If you search, you will find many people running various 4.8 volt only servos on 6 volts regulated. The Futaba S9252 being a prime example.