Removing sealed-off tubes from a small Sealex machine at the De Forest Radio Co. plant in Passaic, NJ, about 1931.
In this issue
- TCA Board Metting, Oct. 3
- TCA Member Metting, Oct. 4
- Further Investigation of the Rectifier-Gammatron
- The Triple Twin and Dynamic Coupling
- Farnsworth’s Cold-Cathode Electron Muliplier Uses Neither Grid Nor Filament
- Weird Tube of the Month – The 5TV4
- The Elusive Lestron
- Tube Testing – And You Want Consistency?
- Low-Voltage Tubes – The 6AJ5
- RCA Factory Code – An Expansion
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