Successful 2.4 Conversion on Big Lama
Well after burning out two Spektrum AR6100 receivers in my attempts to convert my Big Lama to 2.4 GHz so I could use my DX7 transmitter, I finally had success! I can’t say for certain, but It seems that the micro circuitry in the AR6100 is not strong enough to handle the amperage from the 370 size motors and blew out the rudder channel in both of my micro receivers during each of my attempts. (Yes, two receivers and $100.00 out the window).
Today I tried again, only this time is used the heavier Spektrum AR7000 receiver. I plugged the throttle lead coming from the 3-in-1 into the throttle channel on the receiver. I plugged the rudder lead coming from the 3-in-1 into the rudder channel on the receiver and plugged the aileron & elevator servos into their respective channels on the receiver, (just like I did with the micro AR6100 receiver), but this time with the larger, heavier AR7000 receiver, it all worked perfectly!
I took the Big Lama for a test spin and everything worked great. Now I have expo control and can set more servo throw by increasing my end point adjustments on the transmitter.
The weight of this receiver, along with its satellite antenna came out to 18 grams on my scale. I weighed the Esky 6 channel FM receiver that came with the Big Lama, along with the antenna wire and the drinking straw that I used to feed the antenna through my fuselage, and that was also 18 grams. (So no more weight than the stock FM set up).
One thing to keep in mind, the AR7000 receiver will not work unless the satellite antenna is plugged into it. I Put some sticky backed Velcro on it and stuck it to the inside floor at the tip of the nose of the helicopter. It flies great with no balance problems.
Tom