[TheList] Fire UHF incident ground communications

DogSecurity - Richard richard at dogsecurity.co.nz
Thu Nov 23 17:47:00 AEDT 2017


I partly agree, for most people with scanners, in my experience haven't even heard of CTCSS, so as long as it's not published on say RadioWiki and the likes, would prevent most people doing that. 

 Those that know about CTCSS obviously would likely be able to work out what tone is in use, and therefore probably be able to also work out the transmit frequency with a lot of patience :) 

----------------------
Sent from a mobile device. Please excuse my brevity, punctuation and spelling. 

On 23 November 2017 7:35:31 PM NZDT, Radio Scanner <rs157950 at gmail.com> wrote:
>Definitely poor design. CTCSS tones would obviously help with spurious 
>signals triggering the repeater but it wouldnt stop dickheads with a 
>Baofeng for long at all. Atleast the radio can still be used at the
>same 
>time its being mucked with.
>
>On 23/11/2017 1:03 p.m., Brendan Sheehy wrote:
>> We use to get it bad down south untill tx frequency was changed on
>one 
>> of the vtg channels.
>>
>> Get Outlook for Android <https://aka.ms/ghei36>
>>
>>
>------------------------------------------------------------------------
>> *From:* TheList <thelist-bounces at radiowiki.org.nz> on behalf of 
>> DogSecurity - Richard <richard at dogsecurity.co.nz>
>> *Sent:* Thursday, November 23, 2017 11:50:21 AM
>> *To:* thelist at radiowiki.org.nz
>> *Subject:* Re: [TheList] Fire UHF incident ground communications
>> Just on the skip issue you mentioned.. The problem with the 
>> skip/ducting on ESA (I'd put money on that being the offender, rather
>
>> than UHF) is that the police (and fire as they're in bed together) 
>> don't use CTCSS tones, so the repeater receiver naturally opens up to
>
>> everything.
>>
>> Unfortunately that's poor initial design on Police part, to add tones
>
>> after the fact basically can't happen logistically... every RT and 
>> repeater needs to be reprogrammed at the same time to avoid downtime.
>
>> Doing it could be done slowly, add the tones to RT TX first, then add
>
>> the tone to the RX of the repeater. Obviously you'd have to see if 
>> there's a tone on the Aussie TX and not reuse that here (that'd
>really 
>> be RSMs domain) Would also help with that clown down Levin ways with 
>> his crappy Baofeng or whatever ham radio that he shouldn't have, 
>> transmitting on the police channels.
>>
>> Over the last few years it seems to be less of an issue on 
>> Ham1/Waikato Rural at least as more Aussie emergency services are 
>> going UHF/digital etc. But also remember 76megs is more susceptible
>to 
>> noise than VHF/UHF frequencies. Also helping the fact of people
>moving 
>> away from ESA/A-band is Tait is the only manufacturer making that 
>> equipment anymore.
>>
>> Richard
>> ----------------------
>> Sent from a mobile device. Please excuse my brevity, punctuation and 
>> spelling.
>>
>> On 23 November 2017 10:33:16 AM NZDT, Shane Vickers 
>> <senavick2 at gmail.com> wrote:
>>
>>     ESC band in this topic,  The original poster mentioned Area 22.
>>     Can I confirm where this is?  No point getting excited if they
>are
>>     rolling out in Wellington!
>>     Auckland is using F Band high to assist with skip issues from
>>     Aussie many moons ago..
>>
>>     I am assuming Auckland is Area 22 as they have UHF systems in
>>     play..   I am could be so wrong.....
>>
>>     On Thu, Nov 23, 2017 at 9:45 AM, Mike Bailey <tahiini at gmail.com
>>     <mailto:tahiini at gmail.com>> wrote:
>>
>>         My apologies - no regular operational channels. Yes some HF
>>         and airband stuff is listed, but good on ya if you've heard
>>         anything operational on it... ever.
>>
>>         On Thu, 23 Nov 2017 at 09:36 Chris H <radiowiki at archnetnz.com
>>         <mailto:radiowiki at archnetnz.com>> wrote:
>>
>>             When you say no police frequencies at all I beg to differ
>>             on that statement:
>>
>>             Here is just one search I did for Police - like page 2 of
>>             5 or something.
>>
>>             Previous 	Next
>>
>>             Licence ID Descending 	Licence No Descending 	Licensee
>>             Descending 	Channel Descending 	Ref.Freq. (MHz)
>>             Descending 	Location Descending 	Grid Reference
>>             Descending 	Licence Type Descending 	Status
>>             19203 	96116 	NEW ZEALAND POLICE 	ACX45 	119.100000
>>             TAURANGA POLICE STATION 	BD37 795250 	Aero Base (Off
>>             Route) 	Current
>>             23895 	97565 	NEW ZEALAND POLICE 	ACX45 	119.100000 	MT
>>             CARGILL 	CE17 101239 	Aero Base (Off Route) 	Current
>>             23895 	97565 	NEW ZEALAND POLICE 	ARX52 	131.300000 	MT
>>             CARGILL 	CE17 101239 	Aero Base (Off Route) 	Current
>>             24086 	125062 	NEW ZEALAND POLICE 	ACX45 	119.100000
>>             SUGARLOAF 	BX24 717721 	Aero Base (Off Route) 	Current
>>             28430 	92397 	NEW ZEALAND POLICE 	ACX45 	119.100000 	NEW
>>             PLYMOUTH POLICE STATION 	BH29 927760 	Aero Base (Off
>>             Route) 	Current
>>             28430 	92397 	NEW ZEALAND POLICE 	ACX5 	118.100000 	NEW
>>             PLYMOUTH POLICE STATION 	BH29 927760 	Aero Base (Off
>>             Route) 	Current
>>             28430 	92397 	NEW ZEALAND POLICE 	ARX52 	131.300000 	NEW
>>             PLYMOUTH POLICE STATION 	BH29 927760 	Aero Base (Off
>>             Route) 	Current
>>             28430 	92397 	NEW ZEALAND POLICE 	ACX41 	119.000000 	NEW
>>             PLYMOUTH POLICE STATION 	BH29 927760 	Aero Base (Off
>>             Route) 	Current
>>             29066 	92399 	NEW ZEALAND POLICE 	ACX45 	119.100000
>>             STRATFORD POLICE STATION 	BJ30 105448 	Aero Base (Off
>>             Route) 	Current
>>             29066 	92399 	NEW ZEALAND POLICE 	ARX52 	131.300000
>>             STRATFORD POLICE STATION 	BJ30 105448 	Aero Base (Off
>>             Route) 	Current
>>             29066 	92399 	NEW ZEALAND POLICE 	ACX5 	118.100000
>>             STRATFORD POLICE STATION 	BJ30 105448 	Aero Base (Off
>>             Route) 	Current
>>             29066 	92399 	NEW ZEALAND POLICE 	ACX41 	119.000000
>>             STRATFORD POLICE STATION 	BJ30 105448 	Aero Base (Off
>>             Route) 	Current
>>             30121 	126153 	NEW ZEALAND POLICE 	ACX45 	119.100000
>>             MAUNU MT 	AX30 113444 	Aero Base (Off Route) 	Current
>>             30121 	126153 	NEW ZEALAND POLICE 	ARX52 	131.300000
>>             MAUNU MT 	AX30 113444 	Aero Base (Off Route) 	Current
>>             31640 	92401 	NEW ZEALAND POLICE 	ARX52 	131.300000
>>             HAWERA POLICE STATION 	BK30 103172 	Aero Base (Off
>>             Route) 	Current
>>             31640 	92401 	NEW ZEALAND POLICE 	ACX45 	119.100000
>>             HAWERA POLICE STATION 	BK30 103172 	Aero Base (Off
>>             Route) 	Current
>>             31640 	92401 	NEW ZEALAND POLICE 	ACX5 	118.100000
>	HAWERA
>>             POLICE STATION 	BK30 103172 	Aero Base (Off Route)
>	Current
>>             31640 	92401 	NEW ZEALAND POLICE 	ACX41 	119.000000
>>             HAWERA POLICE STATION 	BK30 103172 	Aero Base (Off
>>             Route) 	Current
>>             32224 	135095 	NEW ZEALAND POLICE 	ARX52 	131.300000
>>             PAPAROA 	BT19 636042 	Aero Base (Off Route) 	Current
>>             32311 	97621 	NEW ZEALAND POLICE 	ARX52 	131.300000
>>             AUCKLAND 	BA32 569204 	Aero Base (Off Route) 	Current
>>
>>             Previous 	Next
>>
>>             On 23/11/2017 09:07 AM, Mike Bailey wrote:
>>
>>>             RSM work in mysterious ways. You'll notice they don't
>>>             list any Police frequencies at all. I wonder if this
>>>             falls under the same sort of category - that its RSM
>>>             approved (lets face it, Fire wouldn't go rogue on
>>>             frequencies), and its just not published for privacy and
>>>             security of communications?
>>>
>>>             On Thu, 23 Nov 2017 at 08:57 Grant Carroll
>>>             <grant.carroll at xtra.co.nz
>>>             <mailto:grant.carroll at xtra.co.nz>> wrote:
>>>
>>>                 Hi all,
>>>
>>>                 I'm a bit confused as well.!
>>>
>>>                 On the RSM website the frequencies assigned to Fire
>>>                 and Emergency New Zealand between 492.21875MHz and
>>>                 497.19375MHz are shown as "Land Mobile - mobile
>>>                 transmit" and the repeater frequencies don't start
>>>                 until 498.800MHz. So how are the lower frequencies
>>>                 being used as "portable frequencies" for incident
>>>                 ground communications?
>>>
>>>                 Cheers.
>>>
>>>                 Grunter1.
>>>
>>>                 _______________________________________________
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>>>                 TheList at radiowiki.org.nz
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>>>
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