I can't find my notes, but a pair of control wires goes to each
stepper-motor. Consequently, it's easy to verify continuity to the motors
by measuring the resistance at each wire pair from the ground. SteppIR
should have put the DB-25 wiring in their instruction book, but did not.
You can contact them to find out which pairs go to which pins.
73, Bob - W3YY
----- Original Message -----
From: "Michael Hatzakis K3MH" <email@example.com>
To: <firstname.lastname@example.org>; <SteppIR@yahoogroups.com>
Sent: Tuesday, June 08, 2004 7:04 PM
Subject: [TowerTalk] Debugging Cabling problems
> Steppir group,
> I recall a ways back, a discussion of using control cable impedances to
> debug a control cable problem.
> Right now my steppir is behaving all wacky. Takes a tuning of 15+ mhz for
> 20 meters and changes depending upon the 180 or reverse config. This is
> similar to what happened when one of the wires broke off my DB-25 to the
> control unit. This time, the DB-25 is fine. Can someone forward to me
> they might ave done to see if a control cable wire is broken between my
> shack and the antenna?
> VERY Happy Steppir Customer
> Bellevue, WA
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
> TowerTalk mailing list
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
TowerTalk mailing list