| Chrysler Air Raid Siren Maintenance Manual Supplement | |
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FOREWORD
A SLIGHT MODIFICATION HAS BEEN MADE IN THE ELECTRICAL
CONTROL CIRCUIT OF THE CHRYSLER AIR RAID SIREN, MODEL 20A-480, SINCE THE
PUBLISHING OF THE AIR RAID SIREN MANUAL D-14602. THIS MODIFICATION HAS BEEN MADE ON ALL
THE CHRYSLER AIR RAID SIRENS IN THE FIELD AND THIS SUPPLEMENT IS TO
MODIFY THE MANUAL. MODIFICATION THE MODIFICATION OF THE ELECTRICAL CONTROL CIRCUIT
CONSISTS OF; A DIFFERENT TYPE THERMAL TIME DELAY RELAY, AND THE ADDITION
OF THE THERMAL CONTACT RELAY, TOGETHER WITH THE NECESSARY WIRING
CHANGES. |
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