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A New Approach to Series Heater Strings for Television

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1 Author(s)
Roberts, Frank ; Emerson Radio and Phonograph Corporation, New York, N. Y.

The presence of voltage surges in series heater strings represents a major source of tube failures. Tubes supplied by various tube manufacturers behave differently in the heater string. A method of tube evaluation outside the heater string enables prediction of surge conditions in the string. Surge-free operation can be readily obtained by tube selection. This selection does not provide for trouble-free operation in the event of field tube replacement. It is necessary to establish industry standardization of heater characteristics to eliminate all trouble.

Published in:

Broadcast and Television Receivers, Transactions of the IRE Professional Group on  (Volume:PGBTR-7 ,  Issue: 1 )