JR PP interface jitters?

[jrb]

All was well w/K6-2 @400 and old graphics card (w/o fog or texture).

Did a bit of an upgrade: K6-2 @ 550 and new 3D card fog and texture looks great and program runs fast enough.

But all of my channels bounce around! Looking at the control screen the various bars move above and below their central point.

And when your flying you can take your hand off the stick; can even hear it the throttle bouncing about in the sound.

Do I have too much gain from the amp/transistor?


Many thanks,

Jim

Info about the interface:

(http://users.bigpond.com/DAVEEJAY/i.../interface.html & -- see picture) and following Radio Shack parts with a slight change.

Mounted an 1/8” mono jack (274-248) where the cable would normally exit. This allows you to use either the JR trainer cord or an RS 1/8” mono to mono - 6’ cord (42-2420) for both FMS and flight training.

1. 25 pin D type Solder Plug - Male (276-1547)
2. 25 pin Back shell (276-1549)
3. 2N2222A NPN Transistor (276-2009)
4. 2.2K 1/4w Resistor (271-1325)
5. 100K 1/4 Resistor x 2 = 200K (= 2 x 271-1347)
6. 150K 1/4 Resistor x 2 = 300K (= 3 x 100K, remaining 3 of 271-1347)