| Author |
Message |
    
Revpo
Advanced Member
Username: Revpo
Post Number: 803
Registered: 7-2006
| | Posted on Wednesday, May 04, 2016 - 5:19 pm: | 
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HI GUYS;
Check this out . Railroad has a transponder operating on channel 13 now, cb band, for safety
relay. I guess FCC doesn't care anymore on this. Next they will take frequencies on HF, UFH, VHF..big business.
http://w3.usa.siemens.com/mobility/us/en/Events/railway-interchange/Documents/SIE_BRO_ACSES.pdf
CEF 795
73
REVPO/DOCTOR/CEF 795
Wavin a hand from the cornfields of INDIANA
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N8fgb
Intermediate Member
Username: N8fgb
Post Number: 119
Registered: 5-2002
| | Posted on Thursday, May 05, 2016 - 5:45 pm: |
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Business has been on 11 meter longer than CB radio |
Mdyoungblood
New member
Username: Mdyoungblood
Post Number: 5
Registered: 4-2011
| | Posted on Friday, May 06, 2016 - 1:05 pm: |
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Interesting, I have a friend that lives right next the AMTRAK line here in Baltimore, he's been wondering why his radio goes crazy as a train passes.
3's
MDY |
Kc8gpd
Member
Username: Kc8gpd
Post Number: 60
Registered: 2-2004
| | Posted on Saturday, May 07, 2016 - 10:30 pm: |
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stupid, stupid, stupid
who ever engineered that system has •••• for brains. honestly putting a critical safety device on CB channels is just dumb.
Rev. Robert P. Chrysafis
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Dale
Senior Member
Username: Dale
Post Number: 2280
Registered: 12-2002
| | Posted on Sunday, May 08, 2016 - 9:47 am: |
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i wonder what would happen if someone were to key up a cb when the train passed by
dale/a.k.a.hotrod
cef426
cvc#64
454 [dx numbers]
38lsb
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Revpo
Advanced Member
Username: Revpo
Post Number: 804
Registered: 7-2006
| | Posted on Sunday, May 08, 2016 - 12:18 pm: |
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HEY DALE;
I was thinking the same thing.
CEF 795
73
REVPO/DOCTOR/CEF 795
Wavin a hand from the cornfields of INDIANA
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Tech833
Moderator
Username: Tech833
Post Number: 2355
Registered: 8-2002
| | Posted on Sunday, May 08, 2016 - 10:15 pm: |
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Don't get too excited guys. From their info .pdf- "When the train passes over a transponder, the 27.115 MHz carrier powers the transponder, which allows it to send a 4.5 MHz signal back to the train with coded information representing the restrictions ahead."
They are using the CB band to POWER the transponder. It uses 4.5 MHz. for data. Keying up a CB radio near it will only give it more power.
Your radio 'Mythbuster' since 1998
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Charliebrown
Intermediate Member
Username: Charliebrown
Post Number: 492
Registered: 10-2002
| | Posted on Tuesday, May 10, 2016 - 12:30 pm: |
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So a cb radio can trigger it to transmit to the rail road? Even if it had no data to give? |
Tech833
Moderator
Username: Tech833
Post Number: 2356
Registered: 8-2002
| | Posted on Wednesday, May 11, 2016 - 11:34 am: |
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A CB can power the transponder. That's about it. But, the CB would have to be very close and high enough power.
Your radio 'Mythbuster' since 1998
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Charliebrown
Intermediate Member
Username: Charliebrown
Post Number: 494
Registered: 10-2002
| | Posted on Thursday, May 12, 2016 - 11:15 am: |
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My other question is do you have to be close to the transponder to have any kind of interference from the channel 13 trigger of the transponder? Is it low powered? |
Tech833
Moderator
Username: Tech833
Post Number: 2357
Registered: 8-2002
| | Posted on Tuesday, May 17, 2016 - 12:49 am: |
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You do have to be close.
Your radio 'Mythbuster' since 1998
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Charliebrown
Intermediate Member
Username: Charliebrown
Post Number: 496
Registered: 10-2002
| | Posted on Wednesday, May 18, 2016 - 1:17 pm: |
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Thank you 833 |
Spacemann
Junior Member
Username: Spacemann
Post Number: 11
Registered: 3-2015
| | Posted on Thursday, June 30, 2016 - 4:23 am: |
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What about a his with a handheld CB aboard the train? |
