BASCO Briggs & Stratton Berwick by Triangle Berstan Radio Products
Brush Crystal
Headphones Bannard (Very
ucommon set)
S.G. Brown Type F (English) Branston 2500 ohms
Benwood Co. 2500
ohms Bestone,
Chicago, Henry Hyman Company
Notes on the above: also see scanned ads at bottom of page.
Baldwin: Nathaniel Baldwin made headphones with the moving
armature for extra sensitivity, but were subject to deterioration
in performance due to rust, cracked mica diaphragms, and bent
parts inside, but when they work optimally were very sensitive. A
bit heavy on your head. The Type C were the most pleantiful, but
others were also made as pictured. In some you can see the
assembly date written inside the housing with a red crayon. They
made a Type B, C, G, E, N-2, and some with no model.
Bannard: Don't know much about these but are quite uncommon.
BASCO: Briggs and Stratton headphones to go along with their very
rare crystal radio, these are among my favorite headphones, made
in 2000 and 3000 ohms.
Berstan: Seem to be fairly cheap consumer grade headphones, fairly
uncommon, sensitivity OK for local stations.
Berwick by Triangle: Well built headphones on par with Brandes in
terms of tone and sensitivity.
Brush Crystal: These were piezoelectric headphones with very high
impedance, the piezo crystal tended to deteriorate over time, so
they should be kept in a controlled temperature low humidity
environment. I keep them in a ziplock bag with a silica gel
dessicator inside. Most pairs I have seen are dead, but when they
work properly are very sensitive.
Branston: Canadian make 1920's headphones, Branston made other
radio parts and Violet Rays too.
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Baldwin Headphones from Radio News, December 1923
BASCO Headphones from March 1923
Brandes Headphones October 1923
Brandes Headphones from
Radio News May 1925