I have a model with a Titan SG 23 (zenoa) gas engine where the ignition severely interferes with the radio equipment. I have done anything I possibly can do to reduce possible problems with the installation but interference persist. The range is verry low when enginen is on. Maybe 1/5th of the normal range. I still have not flown the model due to this.

From tests I have concluded that the interference mainly comes from the servo wires (wich are a bit long). The next thing to try is electrical filters on all the servo wires. I’m looking for ideas on what to use here. I would be happy if I could get advice on both how to solder my own filters and what type commercial filters there are.

I understand the interference can come two ways. One is through the servo wires and into the receiver. The other is through the wire and directly to the servo causing the servo to have some stochastic behaviour. Should there perhaps be a filter in both ends?

I’m happy for any advice I can get.

/David