Confederation Marine Modellers

Neat wiring

Building tips - Radio & Electrical

Reliable wiring

Prevent chafing

Servo plugs

Here are four servo plug and wire lead diagrams. We've included these for all those
pilots and modelers who like to swap radio gear between airplanes, or who like to mix
and match receivers, servos, and battery packs. Note that the plus (+) and minus (-)
leads are common across the receiver bus.
However, make certain that these leads are not reversed in the servo plug! as such a
situation will likely cause damage to the servo, resulting in a trip to the repair shop. Also, you should know that while in most cases the signal to the servo is interchangeable between brands, there are certain brands that utilize a different shift on the signal—either positive or negative.


Information from 3-D Flyer magazine.

Hints & tips - Servo plugs

Stick a piece of Velcro to a suitable place on the hull or frames, then arrange the wires across it. Trap the wires by pressing the matching Velcro piece over them.

A number of members have looked enquiringly at the version of this radio that I own.

Some years ago it was available from Harbor Models in the USA, but not recently.

It is now available from two suppliers in the UK, Howes Models and Cornwall Model Boats.:Howes Models F14 and  Cornwall Model Boats F14. This version contains one twin-stick, ideal for twin-prop control, and one single stick. It is an 8-channel radio. The single stick could be replaced with another twin-stick if desired, available from Robbe in Germany.

These versions operate at 40MHz so they must be converted to 2.4GHz for use in North America. Fortunately this is fairly easy to do using the Assan 2.4GHz hack module available from Hobbyking: Hack module., a conversion that I have already done. Step-by-step instructions can be found on Youtube.

That's the good news. The bad news is that the radio will set you back £200 (~CDN$330) and the Assan hack module US$50 (~CDN$63).


Roy C.    Aug 2017

Robbe F14 Navy radio

Save your servo wires from chaffing on bulkheads and when passing thru fiberglass holes by making little grommets out of scrap fuel tubing. Slit them length wise and slide over servo wires. Keep them in place with wire ties or a little Zap glue.

Do take care to install neatly arranged, easy-to-trace wiring throughout the model. Solder all connectors to insure current flow and keep all wires up out of the bilge area to prevent exposure to normal bilge water.

Affix two brass bolts so that they protrude from the transom. Connect these to your battery terminals, if desired via a changeover switch, with the positive (red) terminal on the port side, and the black (negative) terminal on the starboard. These become convenient charging terminals. They could also be placed on deck and take the form of brass bollards or cleats. This idea eliminates the need for another terminal in the radio box, where a charging socket would usually be. Use alligator clips to connect the charger.

Building Tips - Radio and electrical

Member's tip from Garth: Use an empty Tylenol (or similar) bottle to house your receiver and to make doubly sure it doesn’t get wet, seal it with tape or Silicone. 

External charging terminals

Protecting your radio receiver