rc trouble

[Steve Johnson 2Participant @stevejohnson2]

i have just come back to modeling as im one of the older brigade (53) and after the rigors of work and such needed to break . so i have bought 3 rc models all 2 channel 27mzh. a fairy huntsman, a 2 masted scooner and a pt boat. the problem i am having is the yacht has only 1 servo for rudder when first bought it controled well,then the rc stopped working. i have replaced the battery box ,reciever ,crystals, and servo, but to no avail i have swiched things around with my other controlers and, boats ,which work but not in the yacht it must be something silly but im lost HELP before i loose what bit of hair i still have many thanks

[60wattParticipant @60watt]

Hi Steve,

Modellers in a club,who tinker with boats daily,would spot the problem in seconds.

Make of servo?

Make of receiver?

AM or FM ?

Type of receiver batteries?….How many?

If you use four new alkaline batteries for the receiver, does 3 good + 1 flat sort the problem?

Tom

[Steve Johnson 2Participant @stevejohnson2]

thanks 60 watt for the comments,the original reciever was acoms + servo on am. having thought the problem was there i changed servo+reciever to dycmo on am but to no avail. struggling a bit but many thanks. i live in the hull area and have spoden to modelers at our local boating lake and there seems to be a problem at the local club so its hard to contact them

[60wattParticipant @60watt]

Hi Steve,

Is 44 in the older brigade?

   I’ve repaired and serviced dozens of radio sets,acoms among them,but it seems from here that you haven’t even found what is faulty when you have the tools right at your disposal. You have other receivers,transmitters and crystals which should be cross compatible.(27 am generally are)

If you resort to asking another "for hands on help" it would be a good idea to have the boat "connected up " but switched off  and take the other boats or their RC sets with you.

So you’ve swapped servo/receiver to dycmo?….if it is 27 am and you have the receiver battery connected properly there should be no problems controlling it with another working tranny.

1. Older Acoms sets have a larger servo plug and the wiring sequence is + – sig which is opposite to Futaba,hitec and the later Acoms. …..You checked battery polarity first?
2. As I asked in the 17:47 post,what batteries did you use? Four new alkaline cells will stop an acoms servo working with some receivers.

Tom

Did you know ,If you have an oscilloscope you can diagnose many 27 A.M. transmitter faults with no direct connection?  Just set the scope to high frequency,high gain and short the probe to its earth or via a  33 kohm resistor load and place next to transmitter aerial.

[60wattParticipant @60watt]

Steve,

dycmo??    Do yo mean 40 MHz dual conversion RC Dymond?

If so are you now trying to work that receiver with your 27 A.M transmitter?

A little more info goes a long way.

[Steve Johnson 2Participant @stevejohnson2]

many thanks will try to speak to the local scribes this weekend (excuse to get to the lake and take the other two boats) thanks again. steve

[Steve Johnson 2Participant @stevejohnson2]

setup

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