I have connected my Grauper 414 directly to pin 10(signal) and pin 18(ground) on the parallell interface. I have no problems to make it work, but I have to run the radio without the antenna connected otherwise I get distortions, so that the modelles are hard to control. If I remove the antenna the signals becomes clear.
I have head that you should'nt run your radio without the antenna installed because the sender module can be damaged. Is this right ? Can I do some thing to the connection to get rid of the distortions ?