This has turned into such a long thread, and I probably missed it, but the
steppIR people have been contacted about this problem, right? And, did it
ever work with the current cable system? Or did this just pop up after being
used for a while?
(Sorry, just trying to catch up a bit)
73, Mike
----- Original Message -----
From: "Tom Rauch" <w8ji@contesting.com>
To: <john@kk9a.com>; <TOWERTALK@contesting.com>
Cc: <ah6fc@yahoo.com>
Sent: Tuesday, June 12, 2007 11:59
Subject: Re: [TowerTalk] SteppIR problem
>> 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
>
>
>
>
>
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