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IP Trains tri-color signals
IP Trains tri-color signals1:29-scale, operating signals By Kevin Strong
Published: August 22, 2009 
Photo by Kevin Strong
IP Trains
PO Box 166
Hereford AZ 85615
Prices: See below
Web site: www.iptrains.com
Single aspect, double aspect, and dwarf signals, for either 12V or 24V operation; 1:29 scale; brass construction; prices vary depending on signal: $20-$35
Pros: Sturdy construction; bright LEDs, easy to see in daylight.
Cons: None |
Photo by Kevin Strong
Photo by Marc Horovitz
IP Trains offers two styles of signals: a tall one (available with one or two signal faces), and a "dwarf" signal, designed to sit low to the ground. These signals would be appropriate on any standard-gauge-themed railroad set from the 1930s forward. (Narrow-gauge railroads generally didn't have such fancy signals). The taller signals measure about 91/2" (plus a bit extra to stick in the ground). The dwarf signal sits around 1" above the ground. All are made from brass and are sturdily constructed. The finish on them is excellent.
Electronically, all three signals work the same. The signal face itself consists of three, high-visibility LEDs set in clear resin. These show well in daylight, so visibility won't be an issue, even in bright sunlight. All the controlling electronics (diodes and resistors) are contained within the body of the signals, so the only things sticking out the bottom are four color-coded wires used to control the LEDs. The signals work on either 12 or 24 volts, so when you order, make sure you order the correct version for your controlling voltages.
The signals use what the manufacturer calls "Aspect Priority Control." This means that all three LEDs are hooked to a common positive feed, and the most restrictive aspect (red for stop) will override the less restrictive aspects (yellow and green) without having to disconnect those LEDs from ground. So, the green lead would be hard-wired to ground, so it's always on whenever power is applied. If the yellow or red wires get connected to ground through whatever control system is in use, it would automatically turn off the green LED in favor of either the yellow or red. (The red LED would also turn off the yellow one.) At no point can more than one color be displayed on the signal.
The instructions that come with each signal offer wiring diagrams illustrating various ways of wiring the signals so that they're controlled by a switch machine, DCC, or other control system. The instructions are not manufacturer specific, but do give you ideas on how to hook things up.
Overall, this is an impressive signal system. According to the manufacturer's web site, signals are also available in kit form, so, if you wanted to configure them on your own posts, you could do that. For anyone wanting to add that extra touch of realism to their standard-gauge railroad, this is a great way to do it. It brings the track to life even if there's no train on it. |
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Jeff Tyler
IPTrains LLC