[Milsurplus] Re: [Boatanchors] When Were Metal Case Tubes First Produced?

[WA5CAB at cs.com]

I can't quote the exact announcement date but yes, before WW-II.  The first 
RCA Receiving Tube Manual in which octal tubes appear is RC-13, 1937.  The 
tubes are all single-letter ones (5W4, 6H6, 6L6, etc.). 

In a message dated 5/23/2008 4:37:28 PM Central Daylight Time, jfor at quik.com 
writes: 
> Does anyone know when the metal cases tubes (6H6, 6AC7,...) were first
> introduced?  Was it before WW II?
> 

Robert Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
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