Vintage Treasure: The Time-Traveling Ken-Rad 5751 from 1950 – Proof that Tubes Had a Head Start!

Here is an image of one of my more 'interesting' tubes.  It is a Ken-Rad GE, very clearly marked as a 5751, but with a date code from late 1950!  I have another one with same construction, but the date code isn't as clear.. it could either be from 1950 or 1951. 

1. ​Date Code: The visible date code says "0-48", which can be interpreted as follows:
   • "0": The first digit typically indicates the year of manufacture. In this case, "0" likely stands for 1950.
   • "48": The second part usually indicates the week of the year. So "48" would mean the 48th week of 1950.  
2. Tube Type: The tube type marking "5751" is clearly visible.

Given that the tube is marked as a "5751" and the date code suggests it was manufactured in 1950, this provides a strong indication that this tube might indeed be an early production model or a prototype of the 5751. Here are some key points to consider:

1. Early Production or Prototype:
   • It's plausible that this tube is part of an early production run or even a prototype batch made before the official market introduction around 1951. Manufacturers often conducted limited production runs for testing and evaluation purposes.
2. Historical Significance:
   • If this tube is indeed from 1950, it could be quite rare and significant, representing one of the earliest examples of the 5751 tube. This would make it a valuable item for collectors and enthusiasts.

This Ken-Rad 5751 tube dated from 1950 is likely an early production model or prototype, making it a rare and significant piece. This aligns with the historical introduction of the 5751 around 1951, suggesting that early development and testing were underway in 1950.

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More photos of the tubes in question... ( again,  I have two examples)

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