old SANWA radio with no trainer socket - old SANWA radio with no trainer socket

[bitmaniac]

Hello everyone!
I own a (rather old) Sanwa Space PCM 6ch radio.
Although IT IS a PCM it doesn't supports a training
plug or digital output.

After getting your valuable infos on some other radios
modification I wonder if it would be possible to add
this support to my Sanwa PCM -a digital output could
be a good idea!.
Can you give me some advice in wich section of the
circuit should I search or pay attention???

THANKS ,
ALEXANDER - GREECE

[johnhlong]

I believe that FMS only supports PPM.
Rven if you got the interface built the modulation would be wrong

John
Seattle

[bitmaniac]

Hi! John
I forgot to mention that my SANWA has an option
to select PPM or PCM, so I think it could be done
but I don't know where exactly I can take the signal from?! (I don't own an oscilloscope....)

[johnhlong]

I went ou to the web and downloaded one of the shareware ociliscopes. They work using your soundcards input jack.

I then went to Radio Shack and got a cable that connected to my sound card input. You need a sterio input plug or a mono cable and a mono/sterio adaptor for the sound card side. I got aligator clips for the testing side.

I then was able to look at signals and found the right pin that way on my Futaba radio.

Not the best but it did the trick.

John
Seattle, WA
USA

[bitmaniac]

Thanks for your reply my friend!

I was thinking of doing sth like this.
I;ve already downloaded some shareware programs
and I;m going to test them with my r/c
Thanks anyway...

P.S If you want I can mail my sound card-oscilloscopy
proggys I've found (about 8-10 in number!)

[joey pen]

I own a old sanwa space PCM 6ch rdio.
I connect it to PC sucessfuly.
This is how I have built it:
Open the rear remote control lid.
The module HF is in the middle of the remote control board.
Do not remove the HF module ! Only get the signal out!!
Now on the board a 4-pole connector with 4-cable should become visible.
The sequence of the 4-cable from upward to downward is RED WHITE WHITE WHITE .
The first RED-cable is signal-out-cable.
The amplitude of this signal is 8.4v.
Connect this signal-pin out by soldering a wire cable.
Connect another ground-pin out by soldering a wire cable (You can find the pin out at the control-module easily).

See the first diagram of FMS’s manual (FMS ver.2.0 beta 7).
Solder the two wire cable to the appropriate pins.
I use 520 Ohm in stead of 680 Ohm.
When you connect the radio to PC for playing FMS ,be sure to pull out the crystal.


Happy flying!!!!
Joey pen (p6234564@ms1.hinet.net)