[sci.electronics] LF radio control

bill@moogvax.UUCP (Bill Pike) (10/05/89)

While working on an industrial project, I was asked about a remote
controlled crane.  It apparently operates by radio on a frequency
around 250 KHz and is rather old.  I have some experience with radio 
controlled machinery using UHF but am not familiar with applications 
in the Low Freq area.  The radio link is being disrupted by noise 
from modern PWM motor controllers.

Is there much of this type of control in the LF area?
Is this a currently acceptable frequency allocation for radio control?
What regulations apply to equipment in this service?
Is this type of interferance common and if so, what is the
usual corrective action?

Thanks,
Please reply to moogvax!bill@cs.Buffalo.EDU  or post it if you like.