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Reciever voltage?

Old 01-23-2007, 02:18 PM
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ArmedZagi
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Default Reciever voltage?

I've noticed that servos are labled with "Operating voltages" anywhere from 2.4v-12v .... The only RX batteries I've seen are 4.8v or 6v. Will anything higher than 6v burn up the RX? If so...why are servos labled with such high voltages?
Old 01-23-2007, 02:35 PM
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jaka
 
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Default RE: Reciever voltage?

Hi!
Well most servos (JR, Hitech,Blue bird and Futaba) can't stand anything higher than 6V and some servos can't even stand 6V. Mostly 4,8V is the norm.
Some servo brands aiming at car competitors like KO have servos that can tollerate up to 7,2V.
Where have you seen servos that can stand 12V?
Old 01-23-2007, 03:11 PM
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Default RE: Reciever voltage?

It was on one of the ads here floating around the forums... Dont remember the name, but the website carried 2 digital servos, both had operating voltages up to 12v. I wasnt impressed though, even at that voltage, they only had a .13sec/60 degree time.

The servos I'm using operate up to 8.4v. I was wondering if I tried running 7.2v, would it make the servo fsater? Or would I just burn up my RX?
Old 01-23-2007, 03:34 PM
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Default RE: Reciever voltage?

Ah ha... saw it again... its actually 12.6 max volts....

[link=http://www.fmadirect.com/products.htm?cat=46&nid=12]12.6v Servos[/link]
Old 01-23-2007, 03:51 PM
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Charlie P.
 
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Default RE: Reciever voltage?

A 6v system gives you more torque power, but shorter flight times between charges.

The anology is a bucket of water with holes. Bigger holes, more flow, shorter time.
Old 01-23-2007, 04:04 PM
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ArmedZagi
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Default RE: Reciever voltage?

That part I understand. Its the same as more cells in my glider, 6 cells, less climb but it runs longer, 7 cells, more climb.................etc

But how can I tell how much voltage my reciever can take? 6? more?
Old 01-23-2007, 04:17 PM
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Rodney
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Default RE: Reciever voltage?

I have not examined any real late design receivers but; in the past, what limits the voltage is the breakdown voltage of the capacitors. To keep them physically small, the breakdown voltage is very low, often just 6 to 10 volts. Also, the internal voltage regulator in the reciever (most have the rf stage running at about 3 volts) will get excessivly hot at the higher voltages and this can lead to early failures.
Old 01-23-2007, 04:33 PM
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Default RE: Reciever voltage?

This is an old reciever. Its the Hitec RDC3500... I've had it in a glider for 7 years. I'm going to put it in a 72" gas powered bipe with 9 servos. Should I just run it at 6v? Or can it take more than that.

Thanks

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