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Pingree Radio Service Inc.

Pingree Radio Service Incorporated, 170 Summer Street, Boston, Massachusetts, USA


First seen: 01-Jan-1926
Last seen: 01-Jan-1926

Brand(s): Pingree

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Type A
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Tube
{v1} Globe (s-14), "Pingree", Type A, bakelite base, tipless, blue envelope, envelope label

In January of 1926, Pingree Radio Service Inc. placed an ad in Radio Broadcast Magazine, pg 391 (see gallery below)


It gives us a good deal of information, showing a BKNT with envelope label marked 'Pingree' in a diamond shape.

Typical voltage rating of 5v at 0.25 ampere, but a rather unimpressive plate rating of 16-90v. Surely a small OEM effort, and may not have had engraving or ink markings on the base.


I would like to hear from anyone with a specimen of this tube or box that it was sold in. Drop me a note. I suspect this was a 'blue' tube.


Pingree Radio tube ad Jan 1926


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