Ron's Heliproz South Newsletter #9 December 16,2009

This is the season for giving.
Give yourself or a loved one a high power model that can be flown all year long without breaking the bank.
Order tonight and have it under your tree by Christmas!

Newsletter Special

Look at my home page in the "Tips" menu you'll find a good tip about replacing your starter extension shaft. If you have a problem with your shaft sticking in the hex adapter after the engine starts, this one's for you.

Radio Basic Basics - The Transmitter Signal Changes - The Device Changes Behavior

Sometimes when we are trying to program our radio, we get so tied up in the buttons that we forget the basics. No matter what radio we are using and no matter what device we are trying to setup, the thing to remember is that we are sending a signal from the transmitter to some device through the receiver. It doesn't matter if you have a DX-6 or a 14MZ; when it comes to basics, they're all the same.

That signal is a pulse width and that's really all you need to know. The width of the pulse somewhere between 900us* and 2100us.

*That's 900 microseconds or 900 millionths of a second which is just shy of 1/1000th of a second!

How long the signal is determines how the device behaves. We change the length of the signal by moving a stick, flipping a switch or turning a dial. A servo will be at one end of it's travel if the signal is 900us and at the other end of it's travel if it's at 2100us. A gyro might be in heading hold mode if the signal is between 900us and 1500us and in Normal (rate) mode if it's between 1501us and 2100us. I say "might" because the manufacturer sets the behavior with it's hardware or firmware. They tend to stick with what makes sense, so you can almost always figure it out.

I get quite a few calls from people who say their gyro won't change gain even though it's hooked up right. I encourage them to plug a spare servo into the same channel that controls gain (normally channel 5 or Aux 2 on JR radios) and flip the switch they think should change the gain. Invariably, the servo doesn't move because the switch isn't programmed to change the signal. Once we get that fixed, everything is fine. It's always in the manual, but most manuals are written so poorly that it takes too much effort to understand them. I never tell a caller to "Read the Manual". If he had read the manual and understood it, he wouldn't be calling me. If I can help the caller understand why, I'm happy.

I wish you all a very Merry Christmas and a Happy Holiday Season

Ron