Gallery - System Items
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GMT 34 General appearance
Site owners installation. Left, GMT 34/0 (top) and GMT 34/1 (bottom) 'stanby' units. Right, same layout for the 'regular' units.
Site owners installation. Left, GMT 34/0 (top) and GMT 34/1 (bottom) 'stanby' units. Right, same layout for the 'regular' units. Covers removed.
First type GMT 34 with space for advance/retard switch (Key 73)
First type GMT 34 with space for advance/retard switch (Key 73). Including SP relay for synchronising one seconds Clocks No. 28.
First type GMT 34 with space for advance/retard switch (Key 73)
First type GMT 34 showing advance/retard switch (Key 73)
Second type GMT 34, Advance/retard switch no longer provided
Second type GMT 34, Advance/retard switch no longer provided. Including SP relay for synchronising one seconds Clocks No. 28.
Second type GMT 34, Advance/retard switch no longer provided
Second type GMT 34, Advance/retard switch no longer provided
GMT 34/1 showing green, red & black wiring. SP relay no longer provided.
GMT 34/1 showing green, red & black wiring. SP relay no longer provided.
GMT 35 General appearance.
GMT 35 Base removed.
GMT 35 mounted on a board with fuse holders 136A. Probably from a smaller exchange unit due to doorbell and extra non related items.
GMT 35 mounted on a board with fuse holders 136A. Probably from a smaller exchange unit due to doorbell and extra non related items.
Fuse holders No. 136A. To hold Fuses No. 36A for slave clock circuits.
Fuse mounting 731A containing fuses, No. 44A for GMT units and clock 46. Other types of fuse mountings were often used.
Fuse mounting 731A containing the older fuses, No. 31 for GMT units and clock 46. Other types of fuse mountings were often used.
Bell 56C. Sounds the half hourly audible warning produced by a Clock No. 70A.
Key 289A. Used to start & stop/reset the Clock No. 70A.
Key 289B. Used to change larger clock systems between Regular and Standby.
Key 289B. Used to change larger clock systems between Regular and Standby.
Watch No. 1 used on timing duties for clock systems.
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GMT 34 General appearance
Site owners installation. Left, GMT 34/0 (top) and GMT 34/1 (bottom) 'stanby' units. Right, same layout for the 'regular' units.
Site owners installation. Left, GMT 34/0 (top) and GMT 34/1 (bottom) 'stanby' units. Right, same layout for the 'regular' units. Covers removed.
First type GMT 34 with space for advance/retard switch (Key 73)
First type GMT 34 with space for advance/retard switch (Key 73). Including SP relay for synchronising one seconds Clocks No. 28.
First type GMT 34 with space for advance/retard switch (Key 73)
First type GMT 34 showing advance/retard switch (Key 73)
Second type GMT 34, Advance/retard switch no longer provided
Second type GMT 34, Advance/retard switch no longer provided. Including SP relay for synchronising one seconds Clocks No. 28.
Second type GMT 34, Advance/retard switch no longer provided
Second type GMT 34, Advance/retard switch no longer provided
GMT 34/1 showing green, red & black wiring. SP relay no longer provided.
GMT 34/1 showing green, red & black wiring. SP relay no longer provided.
GMT 35 General appearance.
GMT 35 Base removed.
GMT 35 mounted on a board with fuse holders 136A. Probably from a smaller exchange unit due to doorbell and extra non related items.
GMT 35 mounted on a board with fuse holders 136A. Probably from a smaller exchange unit due to doorbell and extra non related items.
Fuse holders No. 136A. To hold Fuses No. 36A for slave clock circuits.
Fuse mounting 731A containing fuses, No. 44A for GMT units and clock 46. Other types of fuse mountings were often used.
Fuse mounting 731A containing the older fuses, No. 31 for GMT units and clock 46. Other types of fuse mountings were often used.
Bell 56C. Sounds the half hourly audible warning produced by a Clock No. 70A.
Key 289A. Used to start & stop/reset the Clock No. 70A.
Key 289B. Used to change larger clock systems between Regular and Standby.
Key 289B. Used to change larger clock systems between Regular and Standby.
Watch No. 1 used on timing duties for clock systems.