Airtronics (SANWA) Vanguard Radio systems Buddy system

[Andrew Saywell]

Hi all

I have just recently purchased a vanguard 6 channel system and noticed
that the buddy box connector has changed from a 5 pin 180degree din to
a six pin 270 degree din plug. Does anyone know if ther is a convertor
cable to allow older sanwa radios to connect to these newer sets and
or does the newer connection mean that these sets can now buddy a
hitec ,JR or Futaba radio???

Anyone from Airtonics care to comment??

Regards

Andrew Saywell
Adelaide
South Australia

[Carl Fickling]

On Thu, 20 Mar 1997, Andrew Saywell wrote:

> Hi all
>
> I have just recently purchased a vanguard 6 channel system and noticed
> that the buddy box connector has changed from a 5 pin 180degree din to
> a six pin 270 degree din plug. Does anyone know if ther is a convertor
> cable to allow older sanwa radios to connect to these newer sets and
> or does the newer connection mean that these sets can now buddy a
> hitec ,JR or Futaba radio???

I don't know why they changed it, but here is some info on the 5 pin din.
I doubt that it will work with the Futaba or Hitech since the polarity is
reversed and a couple channel are turned around, but it might still work
with the older Vanguard units. If you find out any more, please let me
know, as I try to keep a record of the the different types of trainer
systems.

The Vanguard transmitter that I have, has the pinout of the trainer jack
as:

1 & 4 = Vcc (power from/to encoder)
2 = gnd (vcc return/logic gnd)
5 = encoder input from slave
3 = encoder ouput to master

This is a 5 pin din connecter with the pins numbered on the back of the
radio as follows:

2
4 5
1 3

S s= key/shield (which is not connected)

Now for a trainer cord, this translates to a four wire cable or a three
wire with a shield is refered, wired as follows:

pin 1&4 to 1&4 (vcc)
pin 2 to 2 (gnd, use shield if shielded cable)
pin 5 to 3 (encoder in/out)
pin 3 to 5 (encoder out/in)

(note: pins 1 & 4 are wired together, and pins 3 and 5 are crossed wired)

To use, plug into both xmitters. Turn on the MASTER only. (The slaves
encoder will get power from the MASTER, but the slaves RF section will not
have power.) Now the instructor holds the trainer switch on the MASTER to
allow the slave to have control of the plane. Release the Trainer switch to
allow the instructor to fly normaly.

Note: It is best to remove the battery from the slave unit, so that it does
not get turned on by accident, which would cause it to transmitter on its
own channel, and possible interfer with that channel.

Carl, in Fremont, CA. Corsairs are more fun, Shuttles too.
www.best.com/~copilot/welcome.shtml for the Bentwing hanger
for fun cop...@best.com): or for work (ca...@qantel.com)