Northbridge Fire VHF

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KB1FJR
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Northbridge Fire VHF

#1 Post by KB1FJR » 17 Sep 2017 18:05

http://wireless2.fcc.gov/UlsApp/UlsSear ... q=28948140

Looks like Northbridge Fire maybe going VHF 154.3625 R. Which would make sense. At this point I bet the radio system hasn't been constructed yet.

I can not here the UHF link on 458.0625 from Grafton my guess is its local only and very directional

I can here the lowband Dispatch on 33.680 and occasionally mobiles.

Anyone have any more information?

MrSvenSven
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#2 Post by MrSvenSven » 18 Sep 2017 07:25

458.0625 is very weak, but I can hear it when close by. I added the VHF to my scanner a couple weeks ago, but heard a lot of other departments so I locked it out. Northbridge doesn't appear to be using it yet.
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MrSvenSven
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#3 Post by MrSvenSven » 07 Nov 2017 11:41

I just caught some Northbridge FD chit-chat on 154.3625R 151.4. I was mobile in Uxbridge at the time.
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KB1FJR
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#4 Post by KB1FJR » 08 Nov 2017 20:58

I am also hearing a strong CW Id


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MrSvenSven
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Re: Northbridge Fire VHF

#5 Post by MrSvenSven » 18 Oct 2018 15:54

It's patched to 33.68 now.
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sawyer100
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Re: Northbridge Fire VHF

#6 Post by sawyer100 » 21 Oct 2018 12:14

additional FYI:

Northbridge Fire used to dispatch on the District 7 county band 33.620 PL 131.8. Since Northbridge Police is now doing fire dispatch, the PD uses a RF UHF link frequency of 453.6875 PL 77.0 that is used to transmit/receive to the 33.620 base station on the Hill Street water tank.

I also had previously confirmed a lower power low band to UHF crosspatch which transmits from the Northbridge Fire Station on 458.0625 PL 107.2 and a second low power (39.860 Rptr PL 162.2 Police) low band crosspatch to UHF crosspatch which transmits on 465.5125 PL 103.5. I have no idea why there are "base station crosspatches" on both.?. Northbridge Police is now using UHF hand-held portables & UHF mobile radios now full-time now, so the low band usage will eventually go away.

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Re: Northbridge Fire VHF

#7 Post by MrSvenSven » 07 Jan 2019 09:49

Has anyone else been monitoring this? 33.68 has good range, and I can occasionally hear both sides of the conversation on that freqency, so some of the mobile and portable radios must be talking on VHF and getting repeated back over the low band. When dispatch talks, they go over both 33.68 and 154.3625. The coverage on the VHF is not great, I can't hear it any further away than Worcester (and only then when I'm on a hill). The FCC license is for relatively low power so I'm not surprised at the low range.

Occasionally when a portable or mobile talks, I hear it on 154.3625 but at a much weaker signal strength than when dispatch talks. (I can barely hear the units if I'm outside of Northbridge). I wonder if they are using simplex on 154.3625, or if there are two different repeaters providing different levels of coverage.
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sawyer100
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Re: Northbridge Fire VHF

#8 Post by sawyer100 » 11 Jan 2019 17:17

I had Northbridge Fire temporary locked out this week. But as of last week, they were only on low band. All traffic was crosspatched out on the VHF side. I also have the VHF rptr input in my scanner, and not a peep, yet. Plus I believe Northbridge Police (aka Fire Dispatch) is phone lined to the low band base station at the High Street water tank. I have monitored w/ my scanner at the PD & dispatch is not transmitting (via a radio freq) to the 33.680, nor on the VHF rptr input, as of yet.

I will monitor today & this weekend. glad to help :)

sawyer100
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Re: Northbridge Fire VHF

#9 Post by sawyer100 » 12 Jan 2019 01:43

update: Sat 1/12 at 01:38am:

you are correct, dispatch is transmitting on 33.680, crosspatched out on 154.3625 PL 151.4. At least the ambulances are confirmed transmitting on 154.3625 VHF simplex PL 151.4, no longer low band. and the water tank site is receiving it in on VHF, and crosspatching it out on 33.680 (to dispatch).

dispatch = low band
mobiles = VHF, but simplex mode (no rptr yet)

sawyer100
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Re: Northbridge Fire VHF

#10 Post by sawyer100 » 12 Jan 2019 15:47

Update from Sat 1/12 - today's radio traffic:

mobiles = VHF (ambulance 1 & ambulance 2) only.
mobiles = low band (Engine 1 & another fire truck) only.

So it appears only the two ambulances are VHF, remainder of fire vehicles are still on low band.

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Re: Northbridge Fire VHF

#11 Post by MrSvenSven » 27 Mar 2019 08:08

cmpsa wrote:
21 Oct 2018 12:14
Northbridge Fire used to dispatch on the District 7 county band 33.620 PL 131.8. Since Northbridge Police is now doing fire dispatch, the PD uses a RF UHF link frequency of 453.6875 PL 77.0 that is used to transmit/receive to the 33.620 base station on the Hill Street water tank.
The 453.6875 patch to 33.62 131.8 now has a DPL of 712
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sawyer100
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Re: Northbridge Fire VHF

#12 Post by sawyer100 » 08 May 2019 17:04

Update from today (Wed 5/8) - today's radio traffic:

all mobiles/portables = VHF

A few hours today, they spent installing the rptr, and removed the former low band to VHF crosspatch. As of 5:02pm, they are officially on VHF repeater {output & input), and off VHF simplex usage. Second - police dispatch is now operating a "FX1" control station (transmitting on the rptr input, versus the previous Verizon phone circuit).

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