Silver-Marshall Typed Letter Signed, Silver-Marshall General Service Bulletin, Blue Print Schematic and Related Ephemera. Inc Silver-Marshall.

Silver-Marshall Typed Letter Signed, Silver-Marshall General Service Bulletin, Blue Print Schematic and Related Ephemera

Chicago, IL: Silver-Marshall, Inc., c. 1931. Unbound. A small collection of eight pieces of radio related items, consisting of : Silver-Marshall TLS regarding a faulty radio and their reply on company letterhead, dated Nov. 16, 1931 ; an RCA-230 tube spec. slip (dated "7-31") with manuf. guarantee verso ; a two page schematic and legend for "Nine Tube Superheterodyne ; an eight page General Service Bulletin for Silver-Marshall Superheterodynes A. C. Models ; S-212 / 750 blue print schematic ; two annotated manuscript schematics executed in pencil onto paper. All items in good original condition. Good or Better. Item #3149

This collection appears to represent a radio hobbyist or repairman working with Silver-Marshall to figure out an oscillation problem which started after installing new tubes in 1931.

Price: $125.00 CAD  other currencies