[simpits-tech] Wiring of POT and EPL

[Gene Buckle]

> I understand what you say... I don't say it doesn't work the way you say
> it does, but I say that all my sim instruments don't need 400Hz, but
> +-15V and most do have synchros in... well at least they are labeled as
> that, with the 26V 400Hz on the casing as you said. You can see a pic of
> such a thing here: http://www.f16cockpit.net/INSTR1.jpg This is the
> electronics of a SIM INSTR MODE panel for the F-16 Made by Malwin. I
> think you can see on the synchro that there's 400Hz written. I have to
> feed the chip there with +28V, and do get a clean output signal on 4
> wires (most likely sin/cos). If you need more, I can take pics of other
> stuff with synchros in too... but as said, the instruments all operate
> off of +-15V. Even the HSI, which has many synchros (about 6 IIRC) only
> needs +-15V and a sin/cos input signal to be driven....

Ok, the synchro isn't using the DC, the circuit board is.  The sine/cosine
signal *must* be AC for the synchro to resolve.  The only time you'll use
DC for sine/cosine is in an air-core motor.  A synchro is a six wire
device, an air-core motor is a 4 wire device.  I don't know what tricks
Malwin is doing, but I've never seen a _real_ synchro function on DC.

Marv!  Can you ask one of the slip-stick wielders at your office about
this?

g.