Go to: Message List•New Topic•Search
Question for OPB
Author: Dr Zarkoff
Date: 10-18-2010 - 19:17

A while back in a thread about signals the topic of LED signals came up. You mentioned something to the effect that the UP didn't use them because the colors "weren't approved/certified by the FRA". After some digging around, I find that Safetran guarantees them to be in compliance with:

Chromaticity: Meets AAR Manual Part 7.1.10
Beam pattern and values: Exceeds AAR manual part 3.2.37

Is this what you were referring to? I find no such guarantees in their catalog for the plastic and glass color lenses (Corning glass lenses from the 1940s/50s each had a signed inspector's sticker on them). Metrolink has quietly changed all its signals to LED over the past year or so. I did see or hear something about how the UP doesn't like LEDs because "unlike incandescent lamps they don't melt snow", as if the incandescent ones do, but I don't take much stock in the story.

Navigate: Previous Message•Next Message
Options: Reply To This Message•Quote This Message


Subject Written By Date/Time (PST)
  Question for OPB Dr Zarkoff 10-18-2010 - 19:17
  Re: Question for OPB Rasputin 10-18-2010 - 19:50
  Re: Question for OPB OldPoleBurner 10-19-2010 - 23:20
  Re: Question for OPB BOB2 10-20-2010 - 12:14
  Re: Question for OPB mook 10-20-2010 - 17:43
  Re: Question for OPB Dr Zarkoff 10-20-2010 - 18:03
  Re: Question for OPB OldPoleBurner 10-20-2010 - 22:47
  Re: Question for OPB BOB2 10-22-2010 - 01:33
  Re: Question for OPB mook 10-22-2010 - 11:27
  Re: Question for OPB OldPoleBurner 10-22-2010 - 11:50
  Re: Question for OPB Joshua Kind 10-23-2010 - 03:01


Go to: Message List•Search
Subject: 
Your Name: 
Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically.
 ********   **         ********  **      **  **     ** 
 **     **  **    **      **     **  **  **  **     ** 
 **     **  **    **      **     **  **  **  **     ** 
 **     **  **    **      **     **  **  **  **     ** 
 **     **  *********     **     **  **  **   **   **  
 **     **        **      **     **  **  **    ** **   
 ********         **      **      ***  ***      ***
This message board is maintained by:Altamont Press
You can send us an email at altamontpress1@gmail.com