[TowerTalk] SteppIR problem

[Tom Rauch]

> listed.  It states that you need a 33 volt power supply 
> for runs over 200
> feet.    They should really show a maximum cable length 
> for using 33 volts.
> Perhaps with a 500 foot of their cable run you need even 
> more voltage.  Are
> you using a 33 volt supply?
>

There is some point where the equipment fails, and if we 
keep going we can even make it explode!

If the equipment works as K4SAV described, current is 
constant but the pulse width increases with longer runs. It 
is an ampere/seconds problem and the voltage is constant.

If it is constant pulse width then it must increase voltage.

But there will be limits!!

Whatever way it works it is probably a very simple problem 
that the person who designed the system understands. If he 
doesn't understand it, he certainly should learn about it 
quickly. :-) There is some chance in today's cut and paste 
electronics that people build things without understanding 
how they work in the real world, and something like that 
would probably be most common with long wires and motor 
loads and pulsed controllers.

Whatever it is, I doubt random guesses will help much. 
Someone at some point will need to learn how the system 
actually behaves, and that will be the end of it.

73 Tom