Hi all,
I remembered reading when the tunnel first opened, it would have a radio repeater system for AM and FM channels.
I think this included CB, UHF, VHF, car radios etc,
Does anyone know anything about the type of setup/
Cheers
Graham Farmer Freeway Tunnel
Moderator: yorky
Re: Graham Farmer Freeway Tunnel
I don't know about the setup but I remember one of the old analogue Police channels was crystal clear driving through it.
"VKI, NJ050 will you be attending the job?"
"Negative VKI, my desk is bolted to the floor".
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"Negative VKI, my desk is bolted to the floor".
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Re: Graham Farmer Freeway Tunnel
No information I could find on CB radios and UHF/VHF commercial radios, but there's definitely an emergency warning system that can "take over" the broadcast radio band in the event of an emergency or incident...numloxx wrote:Hi all,
I remembered reading when the tunnel first opened, it would have a radio repeater system for AM and FM channels.
I think this included CB, UHF, VHF, car radios etc,
Does anyone know anything about the type of setup/
Cheers
Ref 1: A blog post
Ref 2: Hansard - which mentions "a radio rebroadcast system and variable message signs."
Ref 3: PDF document - mentions "radio re-broadcast system to transmit safety messages to vehicle occupants via the vehicle’s AM/FM radio"
Doug Bell (Zebedee) VK6DB
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Re: Graham Farmer Freeway Tunnel
There is a repeater built into the tunnels which SES have access to as one of the auxillery channels outside of their normal channels...it's logged as either FRS A or FRS B (on the old radio's) I'd initially thought those were simplex however 2 of our unit members are FRS and advised that one of them was the tunnel.
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Re: Graham Farmer Freeway Tunnel
Either chan 57 or 55 works in the Tunnel (I forget which). The 2 x FRS UHF channels are both simplex.Tyranus wrote:There is a repeater built into the tunnels which SES have access to as one of the auxillery channels outside of their normal channels...it's logged as either FRS A or FRS B (on the old radio's) I'd initially thought those were simplex however 2 of our unit members are FRS and advised that one of them was the tunnel.
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Re: Graham Farmer Freeway Tunnel
I think they rebroadcast both into the tunnel.Fastlane wrote: Either chan 57 or 55 works in the Tunnel (I forget which).
Gavin Rogers; VK6HGR
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Re: Graham Farmer Freeway Tunnel
yes this is correct. Its called FRS TunnelTyranus wrote:There is a repeater built into the tunnels which SES have access to as one of the auxillery channels outside of their normal channels...it's logged as either FRS A or FRS B (on the old radio's) I'd initially thought those were simplex however 2 of our unit members are FRS and advised that one of them was the tunnel.
it is on the Motorolla UHF Portable Radios.
----BUDDAH VFRS----
Re: Graham Farmer Freeway Tunnel
all the emergency services have rebroadcast systems through the tunnel, commercial and CB repeaters how ever do not.
all the FM and AM broadcast channels are re transmitted through there as well.
there is also a dedicated computer in the comms room with win radio so the techs can monitor the comms inside the tunnel as well. the am transmitters would cook them selfs coz the fans would die.. pain in the bum. gee thats going back a few yrs now.
all the FM and AM broadcast channels are re transmitted through there as well.
there is also a dedicated computer in the comms room with win radio so the techs can monitor the comms inside the tunnel as well. the am transmitters would cook them selfs coz the fans would die.. pain in the bum. gee thats going back a few yrs now.
Re: Graham Farmer Freeway Tunnel
On another rebroadcast note through the tunnel, I noted that Three 3G had perfect signal and the best ping I've ever seen, I normally get between 300-1500ms around town but through the tunnel got 100-150ms
"VKI, NJ050 will you be attending the job?"
"Negative VKI, my desk is bolted to the floor".
WARSUG General Scanning Moderator
"Negative VKI, my desk is bolted to the floor".
WARSUG General Scanning Moderator