Headset
Item
Title
Headset
Description
U.S. Army Signal Corps HB-7 Headset B-14 Receiver. Tan leather padded HB-7 head band with a clipped on R-14 black bakelite element which is stamped in red with, SC935. The receivers have soft black rubber ear coverings with MC-162-A on the outer edges. Equipped with a 20 inch long brown braided communication cord with a black PL-54 jack plug. Outer headband is stamped in red with SC3729A Braided cord has a small paper band attached to it with CO-162 printed on it.
Identifier
996.129.006
Format
Provenance
The headphones used in WWII American Aircraft are divided into two categories- Signal Corps and US Navy. Signal Corps versions provided to the AAC/AAF for "non helmet" use in WWII aircraft were either high impedance,HS-23 (4000 ohms) to low impedance, HS-33 (600 ohms) The HB- 7 headband was the AAC standard before the war, the shift from high impedance to low impedance earphones was simply a change from R-14 to ANB-H-1 elements that clipped onto the headband. Unfortunately, so many high impedance headsets were already fielded that a plug -in transformer impedance adapter was introduced to make the transition. Low impedance headphones were more reliable and less expensive to make.
Abstract
Good