72MHZ and Digital Servo's - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 12-02-2015, 01:38 PM   #11
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Re: 72MHZ and Digital Servo's

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I will try some heavier 22 gauge twisted servo wire. It can't be my antenna, it wasn't in the plane yet and I moved it out of the way and it made no difference. I think if I need to upgrade my RX's to PCM's I would consider going to a 2.4 Radio. I was only getting the servo's set up and had the battery plugged right into the RX. I'm using Hitec receivers which are not supposed to pick up any interference. Cheers floyd
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Old 12-02-2015, 02:10 PM   #12
Mike Sebastien
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Re: 72MHZ and Digital Servo's

Some digital servos just don't like a high voltage from the battery. Futaba digital servos were terrible for that when we first started using 5 cell packs. When we first switched on the radio the servos would start chattering. The solution was to wiggle the control surfaces which dropped the battery packs voltage and then they settled down. Also if you put a load the control surface, that would solve the problem. I also had the same problem with a couple of HK digital servos, but the Hitec servos were fine. Figured out that power distribution board was putting out 5.5 volts. I put a regulator on the battery which dropped the voltage to 5 volts and everything was fine. Problem solved.
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Old 12-02-2015, 03:39 PM   #13
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Re: 72MHZ and Digital Servo's

With some of the 72 MHz systems even rubbing to metal pieces together on the bench would drive some or all the servos nuts... so that was metal on metal mentioned earlier. The best receiver system out there bar non was the Berg7 ; seven channel receiver, even better than the PCM systems for rejecting interference. Unfortunately they have been discontinued due to the use of 2.4 today.
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