ORIGINAL: johnls
I have completed the install to a comp-arf flash. I have used two 2100mah lipo's, a powerbox sensor,Rx is a JR10DS witha graupner whip aerial, mounted like many people have halfway down the fuz, and I use a JR PCM9 as a TX. I am getting 40yds range with the fully charged lipo's but 48yds range with a single 4.8v NIMH that I half tried it with. I also notice that the range drops off to only 25yds if the lipo's get partly discharged. Is this acceptable and why is the NIMH producing a better range. I would add the ranges are the same for engine off or on but if I take the RX out of the model ( with whip aeria)l and test it with a single servo and the NIMH battery then the range is 80yds.
John
John,
Something is very screwy.. Do a baseline range check with your receiver battery and one servo... that's it lay that stuff on a table about 3 feet above the ground. What range do you get with this setup? Extend you antenna on the 9C transmitter to a length of 7 inches. You should get at least 300 paces / 600 feet.
Then re-install the receiver in your flash... and do another (installed baseline) check (turbine ECU unplugged). What if any is the range difference, between a raw baseline, and installed baseline? There shouldn't be any difference between the Raw baseline, and the installed baseline. Obviously if there is a difference some other component i.e. batt, wiring, servos, something is wrong. Correct that problem first.
Then do a full power turbine running range check you shouldn't lose more that 20% maximum range between the installed baseline and the powered up range check. 20% of 600 is 120 feet so with full power turbine running you should be able to get at least 580 feet range.
For starters if you can't get around 600 feet range with a Raw range check get the transmitter / receiver aligned / tuned. Then go from there step-by-step.
Or you could just get a DX-7 and be done with range problems altogether
)
Lee H. DeMary
AMA 36099