41a Old 41A control, one zone, with shunt lock
By ultrasonic
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I knew this great starter panel as a 41A control used / installed in the 1970s, Smart metal box, with hinged lid to conceal unit, 12v external power supply, one cct, plus shunt cct. Indicators, Green Clear, Red Fault (key locked by a solenoid) Yellow Call engineer to reset if auto Dialer fitted. Bell test removed power from SAB to sound external bell. Yale key switch.
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© Ultrasonic
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1
Photo Information
- Taken with NIKON CORPORATION NIKON D7100
- Focal Length 18 mm
- Exposure Time 10/600
- f Aperture f/5.6
- ISO Speed 500
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