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[Jonty]

  I've an ancient Futaba Attack-R that has worked fine up until now. I've just installed it in a new model with an Mtroniks Viper 15 ESC, and it won't work. At least, it won't unless I have the Tx aerial within a foot of the Rx aerial, which somewhat limits its usefulness.

  I've tried substituting a second servo for the ESC, and the result is just the same. Both sets of batteries are fully charged. I've no spare Tx or Rx to try substituting.

  Any ideas, anyone?

[Shipmate60]

Try removing the red servo wire on the ESC and run an external power supply to the reciever.
This happened to me once and it was the BEC in the ESC.

Bob

[Colin Bishop]

Could be lots of things, I remember on one of my old sets the TX aerial came unscrewed inside once, might be worth checking. Also, while the back is off the TX check for loose wires etc. Also, have you checked the TX and RX  packs battery voltage to ensure you haven't got a dud cell?

[Jonty]

  I should have said that when I tried with the two servos I used a separate 6v battery pack, and the result was the same.

  The drive battery in the model is 12v. Is it possible the ESC has passed the full voltage to the Rx and damaged it?

[Martin (Admin)]

Hi Jonty,

Yes you could have cooked your receiver but lets hope not.
If you are feeling confident, as Colin says have a look inside your Tx to check for loose wires around the RF section.
Also, have a look inside your receiver to look for loose wires (aerial) and or corrosion.

Martin.

[Faraday's Cage]

Jointy,

Do as Martin suggests and also check for the dreaded black wire disease (corrosion of the negative wire within the insulation) in the Tx as you stated that the set was quite old.

Terry.