 Posted:  Thu Mar 28 2019, 11:23pm | |
| Posted by: Darkstar350 | Posts: 811
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| Location: Central Nassau
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| Joined: Mon Aug 18 2014, 10:57pm
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Just wondering if anyone has got activity in the 200mhz band
I know on 220mhz is some ham clubs and around 280/290mhz is govt. but there are some other commercial users of 220mhz
From what i gather 220mhz trunk systems would be mostly LTR/Passport such as a particular passport system comes to mind which was meant to be used by ships but im not sure if thats active anymore
I found a few 220mhz trunk licenses - 2 in suffolk and 2 in NYC -
[link]
[link]
[link]
[link]
Ive been scanning around 217-220mhz and havent heard anything yet but i also recall hearing something like 220mhz radios use a very wide bandwidth and scanners may not be able to receive it properly...
[ Edited Thu Mar 28 2019, 11:33pm ]
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| Posted: Fri Mar 29 2019, 04:27am | |
| Posted by: PFD Mike | Posts: 447
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Old Display Name: PFD Mike
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Donating Member - 2008-2010
 Premium Member | Joined: Wed Aug 02 2006, 12:31am
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| There was a radio service either just above or below the ham 220 band. It used some weird modulation scheme it was a side band with some sort of compression, if I remember correctly. I'm not sure if it was trunked. |
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| Posted: Fri Mar 29 2019, 03:02pm | |
| Posted by: Darkstar350 | Posts: 811
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| Location: Central Nassau
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| Joined: Mon Aug 18 2014, 10:57pm
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PFD Mike wrote ...
There was a radio service either just above or below the ham 220 band. It used some weird modulation scheme it was a side band with some sort of compression, if I remember correctly. I'm not sure if it was trunked.
You may be thinking of the same passport coastal system i was thinking of "Mobex" which is actually 217mhz
According to the RRDB is inactive [link] but the FCC license is still active [link]
Did you ever hear activity on there?
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| Posted: Tue Apr 02 2019, 02:40am | |
| Posted by: PFD Mike | Posts: 447
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Old Display Name: PFD Mike
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Donating Member - 2008-2010
Premium Member | Joined: Wed Aug 02 2006, 12:31am
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This is what I was thinking of - SEA ESP-520 ACSB mobile transceiver used Amplitude Compandored SSB modulation on 220-222 MHz. Some people modified these for Amateur 220 use, but they said it was very labor intensive getting them aligned.
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| Posted: Tue Apr 02 2019, 09:40pm | |
| Posted by: Darkstar350 | Posts: 811
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| Location: Central Nassau
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| Joined: Mon Aug 18 2014, 10:57pm
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But basically no scanner would be able to pick up such modulation ?
I have been scanning around 217-221mhz and havent heard much except some data noises and some ham repeaters
Some type of data that is used by railroads is also found around 218mhz
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| Posted: Thu Apr 04 2019, 11:46am | |
| Posted by: w2lie | Posts: 2824
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Old Display Name: w2lie
| Location: Long Island, NY
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Your Admin
Premium Member | Joined: Fri Nov 04 2005, 03:28am
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| I thought UPS took some of the Amateur Radio band in the 220 range. |
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| Posted: Thu Apr 25 2019, 01:00pm | |
| Posted by: Darkstar350 | Posts: 811
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| Location: Central Nassau
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| Joined: Mon Aug 18 2014, 10:57pm
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Been checking around this band
Most of its dead however -
Im getting possible LTR-type bursts on 220.3175 and 220.4675
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