Thp

[madmedic]

Can anyone provide the THP PL tones by any chance? Looking for the nashville / murfreesboro area.

Thank u for your time.

 

[n3ncn]

right here In RR Database
http://www.radioreference.com/modules.php?name=RR&aid=641

 

[madmedic]

Thanks, I already got this page. See in the part where it says, THP fixed relays, the last inputs are UHF frequecnies but no PL tone.
Still looking for thos UHF PL tones.

Thank you all.

 

[jerk]

I was in Nashville Tennessee last weekend, and got the chance to look inside some THP police cars. I only saw two radio heads, one looked low band and the other was VHF or possibly 800 MHz? Only one car had a laptop computer.

On the trunk were several antennas. CB, two VHF high band, and 800 MHz antenna.
I’m thinking one VHF was for a mobile extender. I thought one might be for a scanner. I saw VHF portables in Capital building. But I am wondering about the 800 MHz antenna. And does THP use mobile extenders for low band.

AL

 

[RandyB]

I believe the 800 MHz antennas may be for the MDT computers. Recently, several conventional 800 MHz frequencies were licensed to the state and there was a discussion on this forum about the possibility of these being for MDT use.

Since UHF is heavily used by county and city police departments in middle Tennessee - especially west of Nashville - many THP cars have UHF radios installed for coordination with local law enforcement. I do know this for sure. Perhaps one of the radios that you saw was UHF. I would assume that the THP cars of the districts east of Nashville do indeed have VHF radios as VHF is more common among the local agencies in that area.

As far as mobile extenders, that is a great question. I’m unsure whether they use these or not. Does anyone know?

 

[tennesseefreq]

THP uses mobile extenders on 154.9050 it the Knoxville district, they also have VHF highband repeaters across the state with output PL tone of 100.0 hz and the inputs vary with site.

 

[firemedic2150]

THP uses Kenwood Dual Band radio's. The single head controls two radios, most cars have VHF Low Band and a UHF deck on one head, and the VHF deck on the other head. The mobile Extenders are Pyramid SVR-2000 on VHF and are tied to the Low Band/UHF head.

Mark Mc.

 

[RevGary]

Just a bit of info - This time of year our family is at our Chapel in north central Wisconsin. We have Chaplain Responder comm equipment at each of our 4 venues in 4 states and today I was just monitoring some low band activity and stopped on 42.420 and was fascinated to hear THP from several different Districts... 800 miles away. The low band 'skip' was quite intense here from 11:00 to about 15:30 CDT. Anyone in TN getting inbound traffic from Louisiana or Oklahoma today on 44.700 or 39.500? Got a little up here but the atomospheric 'E' layer probably would have given more signal strength to TN from those areas. Just curious.

 

[EZlistener]

Hello, Rev. Gary

You mentioned the skip activity on low band today coming from TN into WI. I was driving back from church this AM (Asheville area) to my home in East Knox County, TN. There was skip coming in on THP Channel #1 (42.42 mhz) as well as NCSHP Channel 1 (42.62 mhz). I didn't hear enough to ID the sources of the skipping transmissions, but the THP dispatcher made ref to them a few times. South Carolina has just about abandoned their low band system, so Indiana is a suspect, and even California has been a problem in the past.
Low band is still the primary voice comm system for THP. Most of the old Mastr II, Micor, and Syntor X mobiles have been retired and replaced with the Kenwood dual-band set-up (low band and either VHF or UHF, depending on counties worked). Vehicle repeaters used to be Mastr Exec II's and Moto PAC-PL's on VHF, being replaced with the Pyramid unit.
Here in Knox County, the local LE agencies are on 800 mhz. THP units working this county can lease a radio on the county's trunked system, therefore a 800 mhz antenna occasionally. If the trooper uses a cell phone, there's another 800 mhz antenna.
The VHF system is not used that much, but can relay traffic over long distances. It's no wonder that the deck lids of these cars sprout these arrays, but most traffic is still on low band and especially active this week-end, with the holiday and more intense enforcement activity.

 

[RevGary]

Hi, Thad - Before I became a Minister and Public Safety Chaplain, I ran an international aircraft and marine communications maintenance venue for over 30 years, including a small amount of public safety equipment repairs. Back in the time period 1958 through the late 60's, there was nothing but low band public safety equipment in use nationwide and MAN, you talk about skip congestion ! There were only 50 CTCSS tones in those days (before digital squelch circuits) and it was 'interesting' to say the least. I was in an Upper Michigan County Sheriff's dispatch center as a stand by volunteer rescue vehicle driver one evening in 1960 and we opened up the monitor and counted 164 different agencies coming in on 39.580 over a 4 hour period. You could hear the geographic areas of origin shifting east to west as the night progressed and the atmospheric 'E' layer changed it's height with night time cooling. But that frequency really did a good job in the mountainous terrain in that area and that is why THP still uses it today - it gets through where 800 wouldn't have a chance.

Thanks for the local info and as a side note from today - 42.080 was very active... but wasn't able to determine the exact source - no ID's were given, but I have a feeling that it was South Carolina DPS.

Take care...

 

[SCPD]

Good info. I will be moving to TN within the next year. Just became a Pyramid Communications Dealer, Sounds like i need to call up TN & make some bids. I am also planning on setting up some more VHF/UHF trunking systems in TN. Stay tuned!