Radio News Magazine, December, 1947
The caption for this cover photo reads:
Tube aging rack at Hytron's Newburyport plant. An incandescent
lamp, acting as a current limiting resistor, is in series with each
tube element. This final seasoning and degassification operation results
in the processing of more uniform radio tubes.
This issue of Radio News included articles on TV installation,
composite transmission of audio and video signals for TV, and
three separate transmitter construction projects.
I was interested to see ordinary light bulbs in use for manufacturing
radio tubes. Some of us are still using light bulbs for diagnostic
purposes (see The Dimbulb Radio Tester).
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