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bobreib · 09-17-2009, 08:21 AM

I have never seen a rating on Futaba receivers. It will be interesting to see what people have to say about this. I believe that the connector used to supply the battery power is rated at 5 amps MAX.
22 gauge wire is good for 7 amps ( in short runs as used in models ) so the connector will likely be the limiting factor.
Here is a chart showing the current carrying capacity of printed circuit wiring. http://www.interfacebus.com/PWB_Exte..._Capacity.html
You could measure the width and thickness of the traces between the connector pins to estimate the current carrying capacity.

Estimating the real world current drain of the servos will be the biggest challenge. I guess you could load them to 75% of their rated capacity and measure the current used to move each servo and then add up the total current draw.

Here is a link to a Futaba FAQ that discusses this concern on a 14 channel receiver.

http://www.futaba-rc.com//faq/faq-receivers.html#q878

09-17-2009, 08:21 AM	#2
bobreib RCC Senior Contributor I am: Bob R. Join Date: Sep 2005 Location: Chatham, Ontario Radio of choice: FRSKY Taranis & Graupner MX-16 Feedback: 10 / 100% Posts: 584 Total Props: 5	Re: R617FS Receiver power?? I have never seen a rating on Futaba receivers. It will be interesting to see what people have to say about this. I believe that the connector used to supply the battery power is rated at 5 amps MAX. 22 gauge wire is good for 7 amps ( in short runs as used in models ) so the connector will likely be the limiting factor. Here is a chart showing the current carrying capacity of printed circuit wiring. http://www.interfacebus.com/PWB_Exte..._Capacity.html You could measure the width and thickness of the traces between the connector pins to estimate the current carrying capacity. Estimating the real world current drain of the servos will be the biggest challenge. I guess you could load them to 75% of their rated capacity and measure the current used to move each servo and then add up the total current draw. Here is a link to a Futaba FAQ that discusses this concern on a 14 channel receiver. http://www.futaba-rc.com//faq/faq-receivers.html#q878