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220 MHz to 222 MHz, any systems online???

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russbrill

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Is there any REAL System being used between 220 MHz and 222 MHz. I see some paper systems in the FCC Database, but have nothing here in N. CA..
 

jpm

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I believe they were dispatching fire units on these frequencies
 

ChrisP

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Same in the Portland, OR area. Portland General Electric now running on a 217 MHz DMR T3 system, Tait, I think.

- Chris
 

russbrill

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Same in the Portland, OR area. Portland General Electric now running on a 217 MHz DMR T3 system, Tait, I think.

- Chris
So 32 Years later after the FCC took 220 MHz to 222 MHz from Amateur Radio, we have a handful of users on the band.. Wow!!! Where are all of those Spectrum starved users that needed a new band for their communications...
 

Mr_Boh

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Same in the Portland, OR area. Portland General Electric now running on a 217 MHz DMR T3 system, Tait, I think.

- Chris
Yeah Rappahannacok also Tait. Must be a new thing for them to push to try to vendor lock the subscribers since it's not proprietary trunking like XPT or Capacity.

So 32 Years later after the FCC took 220 MHz to 222 MHz from Amateur Radio, we have a handful of users on the band.. Wow!!! Where are all of those Spectrum starved users that needed a new band for their communications...
I figured that's why you were asking. I mean it's not like 1.25M is super hot with Amateurs. Not that it's dead either....
 

EricCottrell

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Hello,

220 to 222 has an interesting history in the Boston MA area. I remember when there were several ACSSB systems all over the area, then down to a couple that seemed to hold on for a long time. They are all gone now.

The AMTS (217) band had a Passport LTR system from 2004 and then it seemed like it was gone several years later. I remember Mobex had Passport LTR systems in NYC, Philly, and DC.

The major use of both 217 and 220 bands around the area is for Positive Train Control (PTC) for Railroads. These are mainly data transmissions. AMTRAK and MBTA commuter rail on 217 and freight railroads on 220.

73 Eric
 

russbrill

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I’m smelling a new proposal for a revised “Class-E CB Service”

Hold on everyone, it’s going to be another bumpy ride.
Do you know that was proposed back in 1973??? ARRL hated it and used all sorts of political maneuvering to kill it.. The proposal was asking for 224 MHz to 225 MHz.. So instead of wheeling and dealing with the Feds and helping them (FCC) with a major headache, the League added to the FCC's discomfort... So in 1988 the table was turned and we (Hams) got the shaft (Country song???)...
 

russbrill

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Yeah Rappahannacok also Tait. Must be a new thing for them to push to try to vendor lock the subscribers since it's not proprietary trunking like XPT or Capacity.



I figured that's why you were asking. I mean it's not like 1.25M is super hot with Amateurs. Not that it's dead either....
For some reason 220 MHz is treated like the Arm Pitt of Radio :)
 

russbrill

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Hello,

220 to 222 has an interesting history in the Boston MA area. I remember when there were several ACSSB systems all over the area, then down to a couple that seemed to hold on for a long time. They are all gone now.

The AMTS (217) band had a Passport LTR system from 2004 and then it seemed like it was gone several years later. I remember Mobex had Passport LTR systems in NYC, Philly, and DC.

The major use of both 217 and 220 bands around the area is for Positive Train Control (PTC) for Railroads. These are mainly data transmissions. AMTRAK and MBTA commuter rail on 217 and freight railroads on 220.

73 Eric
Cool info to know, Thanks...
 

E5911

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State of Arizona using 220 for data for sensor net at the prison fencing
 
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