[TheList] Fire UHF incident ground communications

Thu Nov 23 17:57:23 AEDT 2017

...or about two minutes with SDR#. CTCSS is a solution to spurious signals
from other sites or countries, not to intruders.

On Thu, 23 Nov 2017 at 19:48 DogSecurity - Richard <
richard at dogsecurity.co.nz> wrote:

> 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>
>> <thelist-bounces at radiowiki.org.nz> on behalf of DogSecurity - Richard
>> <richard at dogsecurity.co.nz> <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>
>> <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> 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> 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 [image: Descending] Licence No [image: Descending] Licensee
>>>>>  [image: Descending] Channel [image: Descending] Ref.Freq. (MHz) [image:
>>>>> Descending] Location [image: Descending] Grid Reference [image:
>>>>> Descending] Licence Type [image: 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>
>>>>> 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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>>>>>
>>>>>
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>>>>
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>>
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