HK Turnigy ESCs

[Dillzio]

Hi all,

I've got one of these SBECs on it's way over to me:
www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=10312

According to the most recent reviews, it's not actually 5 amps, closer to 3.

To speed up my order from Hobby King, I canceled the Turnigy Plush ESC and the spare motor shaft which were on backorder, so I ended up getting this ESC off of ebay:
cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=200468520857&ssPageName=STRK:MEWNX:IT

This ESC's built in BEC supplies 2 amps.

Do you think it might be worth using both of the BECs so that I don't risk overloading them? Perhaps running the elevator and rudder servos off the ESC? I'll be running 6 servos and a HK-T6A radio.

[ginginho]

I don't understand how you could do this, as the servos all have to be connected to the Rx. Generally two supplies to the Rx causes problems as they "fight" to supply the power to the Rx.
How do you propose to wire this up to allow both to supply the power?

[Dillzio]

Well, the three wires for the servos are 5v+ (or 6v), earth, and the control signal. I was thinking I could just have a couple of the servo power wires going to the bec on the ESC.

[flydiver]

It's generally considered not prudent to combine the BEC. The FET on the BEC are matched and on different products are not likely to match. I think they squabble or something. Chances you may know more about the particulars than I do. In this area I just follow 'rules'.

[foo]

What servo's are you planning on running? Some use way more juice than others.

Keep in mind the turnigy is a switchmode BEC where as the other is most likely linear. Switchmode will suffer less from voltage sag under current drain.

Try to get specs for your servos. In all likelihood, they'll draw less than 750mA per servo, which means your turnigy at 5 amp peak current draw should be enough.

[foo]

OK, just checked out the product reviews and it does look like its just plain false advertising!

I'd say order a better SBEC to be safe.