dan bowman

Hi all
I have a futaba R 138 DP receiver, PCM1024, with Hitec HS645, also futaba S 3010, and a 3004 servos. I went to use a 2 cell 7.4 volts, 1800 mA
battery. Will it work?? Or will Ihave to have a regulator? Thanks for the help.

dignlivn

IMO


Yes you will need a regulator.


You need to step down the voltage
to 6 volts at least.

Bob

jimmyjames213

My Feedback: (2)

yes you will, unless your goal is fried servo's/reciever

personally just go with life (a123) batteries

KW_Counter

Dan,
Keep in mind the higher the voltage the higher the current drain and the less flying time available.
Some regulators are adjustable and others can be bought for specific voltages, 6.0, 5.5, 5.0.
What is your reason for the new batteries?
If it is to get more torque and faster responses use the higher voltage.
If you are just switching to new technology use the lower voltages and fly longer.

If you are switching to LiPo it is NOT recommended you charge in the plane.
They have been know to catch fire. Odds are slim - Cost is high.

Good Luck,
KW_Counter

sensei

I cannot speak for other brands but I run all JR digital servos, and JR powersafe RX, with that combo I run 7.4 V lipos direct, no regs. I have been doing this for around 2.5 years now with 0 issues. Just saying...

Bob

KW_Counter

Sensei,
Are these items designed for the higher voltages?
Some manufacturers are expanding their product line for this purpose.
Thanks,
KW_Counter

sensei

No, I have been doing this with 8611s, 8711s, and the DS 368 throttle servos. I also have friends that have been doing it with 8411s as well, I guess I have done this now maybe 800 or 1000 flights. The speed and power of the servos on 7.4 is just awsome.

Bob

dan bowman

Thanks for the info
My idea is more speed & torque. useing a 6 volt reg and it,s working fine. thanks agin

catala

Yes you do! only modern material can stand 7,4v. The most of the material works fine with 4,8 or 6 v. if you aren't sure it cans stand 7,4 volts, you must use an regulator.