Brush BK 401 Tape Recorder

B

r

u

s

h

B

K

4

0

1

T

a

p

e

R

e

c

o

r

d

e

r

The reel-to-reel Soundmirror BK-401 is the second magnetic tape recorder-reproducer of the Brush Development Company. He used paper recording tape coated with artificial magnetite particles. Brush designed the BK-401 after experiments convinced him that a thin, flexible tape would give good audio performance. Introduced in 1947 with tape made by Shellmar Company, the expensive recorder malfunctioned easily. Despite good initial sales, production ceased in 1952.

Features: 1/4" mono full-track reel-to-reel recorder / reproducer. 3", 5" and 7" EIA hub reels for 2-hour recording. 7 1/2 ips only. Reels made by 3M. 
Designed primarily for home-recording purposes. recordings may be made either from a crystal microphone, supplied with the unit, or from a phonograph pickup or the detector stage of a radio. Any previous recording on the medium is automatically erased at the time a recording is made. Level is monitored during the recording period by means of a magic eye tube.