Vtg CBS-Hytron Manual ~ Phototubes Applications Characteristics Diodes 1950s

Description

Up for sale is a manual put out by CBS-Hytron featuring Phototubes and how to use them, undated circa late 1950s.  Measures 8 1/2" x 11".
Very good condition, shows a little wear.  Contains 6 pages in all.  This is an original document.
I pack for safe shipment.
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