CHP repeater order for Tait

[citylink_uk]

The article doesn't give much detail on the usage or band of these repeaters.


"State of California chooses Tait"

The State of California recently purchased 162 TB9100 Base Stations for public safety use by
the California Highway Patrol, CHP.

Tait Radio Communications Solutions Provider, Comtech Communications in
Sacramento, California won the award. “We are pleased to be able to provide the
State of California with the most advanced and intelligent base station on the market
today,” says Mike Fraser, General Manager of Comtech Communications.
www.comtechcomm.com.

“We are honored the State of California chose Tait to supply our digital IP P25
TB9100 Base Stations. This is yet another example of Tait products demonstrating
their outstanding features, performance and value over the competition,” says Steve
Cragg, President of Tait Radio Communications in Houston, TX."


http://www.taitworld.com/main/index.cfm/1,776,2071,48,html/State-of-California-chooses-Tait

 

[OpSec]

Here is the specs page for the TB9100...nothing on lowband, so I wonder if this is a step towards a 700 Mhz system?

 

[ScannerDude244]

Here is the specs page for the TB9100...nothing on lowband, so I wonder if this is a step towards a 700 Mhz system?

Maybe, or less they custom make them for low band like other stuff they get.

 

[citylink_uk]

I'm not an expert on CA, CHP or their systems, but I would think this is more likely to be either for interoperability purposes or perhaps RF Linking?

It would take an order for more than 160 repeaters for it to be economical for Tait to make a new repeater. They still manufacture the T800 II repeater to satisfy 66-88mhz orders.

 

[ScannerDude244]

I'm not an expert on CA, CHP or their systems, but I would think this is more likely to be either for interoperability purposes or perhaps RF Linking?

It would take an order for more than 160 repeaters for it to be economical for Tait to make a new repeater. They still manufacture the T800 II repeater to satisfy 66-88mhz orders.

They do have the 70mhz links narrowband? Or maybe the new base stations for narrowband? I dont know what base station they use now, anyone know?

 

[citylink_uk]

Ah, that could rule them out as RF linking repeaters then. These TB9100 repeaters are fully P25 ready (and support analogue) whilst the identical TB8100 is the analogue only version.

I'd still guess at some kind of interoperability use but I'll wait for the local experts to give their views.

 

[ScannerDude244]

Ah, that could rule them out as RF linking repeaters then. These TB9100 repeaters are fully P25 ready (and support analogue) whilst the identical TB8100 is the analogue only version.

I'd still guess at some kind of interoperability use but I'll wait for the local experts to give their views.

Well their isn't to much 70mhz left they use 70mhz for link mountain top to mountain top if their isn't a microwave at the site.

But I do remember reading my local city council report saying they were approving a frequency to share with CHP.

Also if you want learn more about CHP system exsmokey did a good write up on the system

A Beginner's Guide to the CHP Radio System:
http://www.radioreference.com/apps/db/?aid=995

 

[jlanfn]

Maybe, or less they custom make them for low band like other stuff they get.

I think we can rule out the idea that they are going to be lowband repeaters. Wayne made a comment on another thread stating that lowband repeaters are extremely expensive and impractical.

...

Regarding the age and technology of the system....as Trooperdude said, making low band work is an art. The best way it can be done in such a size that the CHP need is being done now. It would be nice to have a standard repeater setup but when dealing with multiple transmitters and receivers at a site you need a ton of space for the duplexers. Low band duplexers are huge and very expensive. So there's not a lot that can be done now to improve the system.

 

[citylink_uk]

Yes, especially expensive for the high power that the CHP repeater no doubt operate at.

We have 25W 50mhz ham repeaters here in the UK and they only have a 0.5mhz split to work with. Also our county Fire service is still running a 70mhz 6 site quasi-sync AM system, but they at least get a 10meg split to play with.

it just shows you that anything can be done with a bit of ingenuity!

Although once you've got yourself into the hassle of installing low band, you can quickly realise that you can achieve the same coverage with more efficient VHF systems with allot less hassle and money!

 

[trooperdude]

Doesn't have to be low band equipment.

CHP runs UHF repeaters left over from when they merged with State Police.

It could be a modernization of that system to prepare for narrow band/P25 digital for their UHF system.

 

[avtarsingh]

chp has usually been using daniels rptr s for their uhf "VIP" dignitary protection rptrs they are populating all over the state on a gradual basis

chp is trying to replace their base radios at all of their AO and have paid for them - but chp hasnt been able to agree what to buy

also independent BLUE receivers are being added in on mtn tops to replace the current practice of adding on a rcvr in the master III

independent antennas for the BLUE