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Old 27th Apr 2014, 5:51 am   #2
julie_m
Dekatron
 
Join Date: May 2008
Location: Derby, UK.
Posts: 7,735
Default Re: H.T. 120 volts; L.T. 2 volts (accumulator) batteries?

There was definitely a D_3_ range of directly-heated dry-battery valves on octal bases.
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