WA Radio Scanner Users' Group

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

I don't know about the setup but I remember one of the old analogue Police channels was crystal clear driving through it.

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

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...

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"

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.

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.

Either chan 57 or 55 works in the Tunnel (I forget which). The 2 x FRS UHF channels are both simplex.

Fastlane wrote: Either chan 57 or 55 works in the Tunnel (I forget which).

I think they rebroadcast both into the tunnel.

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.

yes this is correct. Its called FRS Tunnel
it is on the Motorolla UHF Portable Radios.

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.

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