- In this issue
- Omega S. C. A. and Tubelec S. A.
- “Between the Halves
- Uncle Sam’s Tube Manuals
- More Private-Number Tubes
- U. S. NavyTube Types, 1928
- TCA Board/Member Meetings
- Another RCA Cobtact Report
- “Tubes the Hard Way” – A Reprise
- The 6P6
- Nomenclature for Glass Bulbs
- Tubemaking New Jersey, 1940
Vol. 7, No. 5
![Volume 7, Number 5 Volume 7, Number 5](https://vacuumtubearchive.com/wp-content/uploads/2023/04/vol07-no5.jpg)
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