radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

Headset 528 / 161A with SW-141-V

Headset 528 / 161A with SW-141-V; Western Electric (ID = 2538385) Military Headset 528 / 161A with SW-141-V; Western Electric (ID = 2538387) Military
Headset 528 / 161A with SW-141-V; Western Electric (ID = 2538388) Military Headset 528 / 161A with SW-141-V; Western Electric (ID = 2538389) Military
Headset 528 / 161A with SW-141-V; Western Electric (ID = 2538390) Military Headset 528 / 161A with SW-141-V; Western Electric (ID = 2538391) Military
Headset 528 / 161A with SW-141-V; Western Electric (ID = 2538392) Military
Use red slider bar for more.
Headset 528 / 161A with SW-141-V; Western Electric (ID = 2538385) Military
Western Electric: Headset 528 / 161A with SW-141-V [Military] ID = 2538385 1400x1976
Select picture or schematic to display from thumbnails on the right and click for download.
For model Headset 528 / 161A with SW-141-V, Western Electric Company Inc.; New York (NY):
US military headset consisting of a hearing capsule '528', a condensor '161A' and a tonality switch 'SW-141-V' mad by Trav-Ler Karenola.
 
Country:  United States of America (USA)
Manufacturer / Brand:  Western Electric Company Inc.; New York (NY)
Year: 1941 ?? Category: Military Equipment (not Re, Tr or RXT)
Wave bands - without
Details
Power type and voltage No Power needed
Loudspeaker - Is a Headphone or Earphone
Power out
from Radiomuseum.org Model: Headset 528 / 161A with SW-141-V - Western Electric Company Inc.;
Material Various materials
Dimensions (WHD) 61 x 61 x 52 mm / 2.4 x 2.4 x 2 inch
Notes

This headset was developed for military application - in particular for use in tanks.  It consists of a hearing capsule "528" and a tonality condensor "161A".

The DC-resistance of the hearing capsule is 55 Ω, and the induction is 50 mH (@ 1 kHz), resulting in an impedance of 300 Ω.  The capacity of the condensor is 0.15µF.  It is attached to the hearing capsule by a bayonet lock system.

Also part of the headset is a switch, model Trav-Ler Karenola SW-141-V. Switch, hearing capsule and condensor are wired in such a way that when releasing the switch handle, the condensor is put in series with the hearing capsule, thus forming a high pass filter network. This shifted the maximum of the response curve of the hearing capsule to higher audio frequencies, thus improving the understandability in high noise level environments.

When pressing the handle, the condensor was bridged, broadening the frequency response of the hearing capsule.  A small catch served to retain the handle in pressed position, giving relief to the operator's thumb during extended broad band operation.

The patent application document US 1273351 of 1918 (the number embossed on the rear of the hearing capsule) can be viewed via Internet patent servers. It shows interesting construction details of the mechanical setup.

Net weight (2.2 lb = 1 kg) 0.205 kg / 0 lb 7.2 oz (0.452 lb)

Model page created by Harald Giese. See "Data change" for further contributors.



All listed radios etc. from Western Electric Company Inc.; New York (NY)
Here you find 149 models, 124 with images and 27 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
rmXorg