GrahamH's photos with the keyword: signal

Toowoomba Signal Box P9127286

Toowoomba Signal Box P9127286

GrahamH
26 Sep 2025 15 29 353
The structurally restored signal box in Toowoomba's yard. See PiP for a photo from 2013. The signal box has no function as all signals and points operations are now done from a control centre in Brisbane, the state capital. September 2025. HFF to my Ipernity viewers for 260925.
Distribution Box 20220303 15 42 44 Pro

Distribution Box 20220303 15 42 44 Pro

GrahamH
19 Mar 2023 4 2 286
A circuit I built in early 2021 to take a mono unbalanced audio signal at line level from a sound desk, isolate it and provide two pseudo stereo feeds to different devices and a headphone monitoring point. The 4 connections are 6.5mm phone sockets. This was used in enabling church services to be sent over the Web on a conference program. Mouse over for more info. March 2022.
TrioAG-202A 5178

TrioAG-202A 5178

GrahamH
15 Aug 2022 4 239
My Trio audio oscillator hard at work supplying a 1Khz tone at -40Dbm to my church's sound system. June 2019.
201109Glenapp 027

201109Glenapp 027

GrahamH
03 Mar 2014 205
Redundant rail lubrication gear. September 2009.
201109Glenapp 025

201109Glenapp 025

GrahamH
03 Mar 2014 234
The signal box, made redunant by the replacement of the electric staff safeworking with a centralised system. September 2009.
201109Glenapp 028

201109Glenapp 028

GrahamH
03 Mar 2014 219
Redundant rail lubrication gear. September 2009.
201109Glenapp 021

201109Glenapp 021

GrahamH
03 Mar 2014 1 236
General view of signal box and radio site. September 2009.
201109Glenapp 020

201109Glenapp 020

GrahamH
03 Mar 2014 228
Train radio mast and antennas. September 2009.
201109Glenapp 018

201109Glenapp 018

GrahamH
03 Mar 2014 1 218
The signal box, made redunant by the replacement of the electric staff safeworking with a centralised system. September 2009.
201109Glenapp 017

201109Glenapp 017

GrahamH
03 Mar 2014 78
201109Glenapp 016

201109Glenapp 016

GrahamH
03 Mar 2014 1 220
Loco water standpipes apparently under someone's care for preservation. September 2009.
201109Glenapp 014

201109Glenapp 014

GrahamH
03 Mar 2014 199
Loco water standpipes apparently under someone's care for preservation. September 2009.
201109Glenapp 013

201109Glenapp 013

GrahamH
03 Mar 2014 212
Loco water standpipes apparently under someone's care for preservation. September 2009.
201109Glenapp 012

201109Glenapp 012

GrahamH
03 Mar 2014 190
Loco water standpipes apparently under someone's care for preservation. September 2009.
201109Glenapp 011

201109Glenapp 011

GrahamH
03 Mar 2014 238
Loco water standpipes apparently under someone's care for preservation. September 2009.
201109Glenapp 010

201109Glenapp 010

GrahamH
03 Mar 2014 208
Loco water standpipes apparently under someone's care for preservation. September 2009.
201109Glenapp 009

201109Glenapp 009

GrahamH
03 Mar 2014 1 237
Loco water standpipes apparently under someone's care for preservation. September 2009.
201109Glenapp 008

201109Glenapp 008

GrahamH
03 Mar 2014 226
Loco water standpipes apparently under someone's care for preservation. September 2009.
23 items in total