Old 10-21-2005, 04:30 AM   #1
mtrails
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Question FRED's

Just curious... I've seen trains with dead FRED's, and was wondering how long they typically last, and are there replacement FRED's or batteries on board the train? Should a dead FRED be reported?
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Old 10-21-2005, 05:18 AM   #2
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Quote:
Originally Posted by mtrails
I've seen trains with dead FRED's
During the day or at night? If it was during the day, well, they don't blink during the day, only at night. If it was at night, then I guess it was dead!
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Old 10-21-2005, 06:18 AM   #3
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Quote:
Originally Posted by bnsf sammy
During the day or at night? If it was during the day, well, they don't blink during the day, only at night. If it was at night, then I guess it was dead!
They do more than just blink. EOT's today also give brake pipe pressure and allow the engineer to shoot the air from the rear of the train as well as the front if needed. I'm sure a railroad employee could explain it further.

To answer the original questions...

Quote:
Originally Posted by mtrails
I've seen trains with dead FRED's, and was wondering how long they typically last,
Batteries should usually last something like 40-60 hours, shorter in cold weather.

Quote:
are there replacement FRED's or batteries on board the train?
Depending on rulebooks, usually the train can continue on to the next terminal where the battery can be replaced. Usually, there will be a low battery warning on the head end well before it actually dies.

Quote:
Should a dead FRED be reported?
During a roll by inspection, a crew member either on the ground or in the cab will let the passing train know if their EOT is out. Even if it's out, it serves as a marker. The batteries will get replaced at the next terminal.

Last edited by cmherndon; 10-21-2005 at 06:20 AM.
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Old 10-21-2005, 06:37 AM   #4
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Just to add to Cmherndon's post. I belive (correct me if i am wrong) that EOT units have there own frequiency. It is a universal number, meaning it doesnt change from RR to RR. I belive the frequiencies are 457.9375 and 452.9375. I belive the EOT units, brodcast train information, using the freq. The freq. alos 'chrp' every 40 seconeds of so. I dont know if this is correct or not.
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Old 10-21-2005, 08:07 AM   #5
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Your correct Pat. Its a great freq. to have programmed in your scanner. Always warns me if a train is near when I start hearing the Churp of the FRED.
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Old 10-21-2005, 08:13 AM   #6
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Quote:
Originally Posted by Pat Lorenz
I belive (correct me if i am wrong) that EOT units have there own frequiency...I belive the frequiencies are 457.9375 and 452.9375.
Yes, you are correct about that. Unless things have changed, some NS EOT's transmit on AAR Ch. 67 (161.115). I usually don't listen for the "chirp" on the radio since I usually always have it on the road channel.
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Old 10-21-2005, 02:01 PM   #7
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Quote:
Originally Posted by SD70MAC
Your correct Pat. Its a great freq. to have programmed in your scanner. Always warns me if a train is near when I start hearing the Churp of the FRED.
I did this as well. Except in the metro, it became very annoying. Maybe if I am out state. I read somewhere the chirping is strong enough to be heard 3-4 miles away, giving plenty of warning. If I remember right, the chirp is actually the information being broadcast to a reciever in the locomotive.
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Old 10-21-2005, 07:56 PM   #8
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Quote:
Always warns me if a train is near when I start hearing the Churp of the FRED.
Thats what that was!!!!!!! I was in a BN SD40-2 awhile back and an eastbound train passed the rear of the train and I heard a chirping noise.At the time I didn't know what it was.
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Old 10-21-2005, 08:56 PM   #9
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Quote:
Originally Posted by busyEMT
If I remember right, the chirp is actually the information being broadcast to a reciever in the locomotive.
Like a MDT for trains.
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Old 10-21-2005, 11:39 PM   #10
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I don't know how they did it; but the mad scientists of Big Railroad devised a way to cram the crew, which once proudly rode in the caboose, into a metal box no more than a foot wide a two feet high.
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Old 10-25-2005, 06:09 PM   #11
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The FRED Freq. really helps me in the open desert, i usually can pick up the chip 3-4 miles and that lets me know that a train is somewhere heading to me. Occasionally i can pick up the actual broadcast, meaning i can hear what is being said over the FRED but it doesnt happen alot, and when it does it isnt very clear. But the Freq sure does work nice, but dont use it around the Yard areas, or by a train in the siding because the chirp will never stop, it will only confuse you more!
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Old 10-25-2005, 09:44 PM   #12
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There are new EOT (End Of Train) Devices coming into the field now, they draw power off of the train's air line which in turn actuates a small generator within the device and keeps the light flashing. You'll notice a hi pitched humming coming from these particular EOT's.

I don't keep the freqs programmed into any of my radios anymore, they became to damn annoying especially when you have two Class 1's within close proximity of each other.

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Old 10-25-2005, 10:52 PM   #13
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There's a small turbine in there that spins around, and generates the power for it. CN bought many of these type. I saw one, and it was colored green.

The light on a FRED can be turned on and off from a cab.
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Last edited by Frederick; 10-25-2005 at 10:58 PM.
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Old 01-06-2007, 03:07 AM   #14
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The crew of the train will know if the F.R.E.D. is not working. If the F.R.E.D. is not working the train may proceed at 35 mph to the next terminal were the F.R.E.D. can be fixed.

And the F does NOT stand for flashing.
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Old 01-06-2007, 03:49 AM   #15
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Quote:
Originally Posted by Tåg
And the F does NOT stand for flashing.
"Functional."
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Old 01-06-2007, 08:57 PM   #16
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Just to confirm, the universal frequencies are: 457.9375 and 452.9375 ?

Thanks!
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Old 01-07-2007, 01:47 AM   #17
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Quote:
Originally Posted by J
"Functional."
No but it does have have the letters f u and c in the name.
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Old 01-07-2007, 02:10 AM   #18
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Here is the FRED frequencies... Primary 457.9375, Alternate 457.9125.
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Old 01-07-2007, 05:05 PM   #19
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Quote:
Originally Posted by Warren
Here is the FRED frequencies... Primary 457.9375, Alternate 457.9125.
Thank you!
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Old 03-24-2007, 03:01 PM   #20
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Quote:
Originally Posted by J
"Functional."


Don't Ban me for this. No criticism please. "Fucking Rear End Device"
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Old 03-24-2007, 09:28 PM   #21
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And you revived a three-month-old thread to say that?
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Old 03-24-2007, 11:11 PM   #22
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Quote:
Originally Posted by BNSF4682
Don't Ban me for this. No criticism please. "Fucking Rear End Device"
No, it actually stands for Fuchsia Rear End Device, so named because of its bright purplish-red color.
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Old 03-25-2007, 12:18 AM   #23
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Quote:
Originally Posted by mute
No, it actually stands for Fuchsia Rear End Device, so named because of its bright purplish-red color.

A freighthopping book says otherwise.
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Old 03-25-2007, 12:34 PM   #24
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Quote:
Originally Posted by BNSF4682
A freighthopping book says otherwise.
The book is just trying to be controversial I'm sure.
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Old 03-30-2007, 03:18 AM   #25
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Quote:
Occasionally i can pick up the actual broadcast, meaning i can hear what is being said over the FRED
No you cant it's only data to the HEU. You may be hearing a trackside defect detector.

Quote:
Don't Ban me for this. No criticism please. "Fucking Rear End Device"
That is Exactly Correct

Quote:
The light on a FRED can be turned on and off from a cab.
Nah, they have a photocell in them...

The fred does a few very useful things. First it tells the brake pipe pressure at the end of the train. Very useful information there. Could save a conductor alot of walking. Second it acts as the rear marker. Third it will tell the engineer if the rear of the train is actually moving. Four the engineer can dump all of the air from the rear of the train using the fred.
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