Spektrum DX6i / BR6000s

[leorcc]

If you can supply me a DX7 for the price of a DX6i I would have no problem with that at all.

[woody]

http://groups.yahoo.com/group/armornutsrcarmorhut/message/12404http://groups.yahoo.com/group/armorn.../message/12404

[leorcc]

Thank you Woody.

[widow_twanky]

Like I said Leo, it was an observation and may be a freak issue, but it definitely made a huge difference to go from a seperate battery to a BEC.

Out of interest did you measure the voltage because a high current draw (assuming a fixed resistance) may cause a dip in voltage. (Ohms law, if you increase the current with a fixed resistance then a drop in voltage will occur if the voltage regulation isnt up to it)

Again out of interest, what was the voltage of the battery pack?

As this is an easy one to test, I may stick in a 6v voltage regulator and see if it makes any difference to the whole set up with the Roboteq. If it does, its worthy of further investigation, if not then its not worth persuing.

Andy

[woody]

Capacitor mod, putting a 4700 uF capacitor on the power line to make sure you dont get any brief dips below 3.5v that will cause the receiver to reboot.

http://www.spektrumrc.com/Products/Default.aspx?ProdID=SPM1600http://www.spektrumrc.com/Products/D...ProdID=SPM1600

[leorcc]

well we were testing the BR6000 fur use in an antweight robot and wanted to see how far we could push it. As it turns out, the receiver can take a lot more than 6V (at 8V the BR6000 is still fine even), so we could run servos at a higher voltage as well. But when we had it on a steady 5V lab power supply we measured the current draw of the receiver in rest and during servo activity. now we expected with the S75 servo for a drastic increase in current draw. But even in rest the 145mA is quite a lot, over 3 times what my GWS RX did.

[leorcc]

Putting a capacitor on receivers is always a good idea in RC branches where a lot of current is pulled. Its worth checking into if it is the problem in Andys case.

[widow_twanky]

Any ideas how the receiver voltage is monitored?

As I said in the DX6i manual it says 4.8V is the minimum. It doesnt mention it in the DX6 manual.

If its monitored from the Tx as part of the software then.................

Out of interest Woody, where did the 3.5V figure come from?

Andy

[leorcc]

Well we monitored the voltage during our tests by looking at the gauge on the lab PSU. current we measured with an oscilloscope.

Of course that is more problematic in the field. Still any well charged RX battery (5 cel preferred) should suffice. In a heavy a lot of roboteers used those 6V SLA blocks.

[woody]

At only 7 grams, the AR6000 receiver is specifically designed for lightweight, electric powered planes and helis. Better yet, it will deliver reliable range exceeding that of any other receiver sold specifically for parkflyers.


Specs
Type:Park Flyer Only
# of Channels:6 Channels
ModulationSM
Band:2.4GHz
Dimensions (WxLxH):39 x 39 x 9mm
Weight:7 grams
Voltage Range:3.5V-9.6V
Antenna Length:3.75 in (2)

I assume the BR6000 is exactly the same specs.