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History of the manufacturer  

Pioneer Engineering Laboratories; Jersey City, NJ

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Name: Pioneer Engineering Laboratories; Jersey City, NJ    (USA)  
Abbreviation: pioneer-tu
Products: Brand
Summary:

Pioneer Engineering Laboratories
215 Suydam Ave, Jersey City, New Jersey

Tube brand: Pioneer

Pioneer tubes were apparently made for Woolworths in the late 1920's.
201A, 210 and 281 tubes have been located, so it might be assumed that a wider range of tubes of the time were also made.
An advertisement in QST magazine, February 1928 states "Specialists in High Vacuum Tubes.

See also Commander and Viking tube brands, which have a similar/identical box design.
History:

This manufacturer was suggested by Fin Stewart.

[rmxhdet-en]

Further details for this manufacturer by the members (rmfiorg):

QST magazine February 1928tbn_pioneer_tube_ad_qst228.png
  
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