American Bosch 670T
United American Bosch Corporation,
3664 Main Street,
Springfield, Massachusetts USA

    The 670T, sister radio to the Westinghouse WR-214, was the largest table model radio American Bosch offered in it's 1937 radio line.  The same chassis was used in the American Bosch 670C console model.  The most noticeable feature of this radio is the large, side lit, glass dial which features four bands in various colors.  There's a color wheel in front of the shadow-tuning indicator that causes the indicator to illuminate in a particular color according to which frequency band the radio is switched to.  Today this radio is considered to be quite rare which is ironic when compared to the next model down, the 660T, which shows up every so often in radio ads, auctions and swap meets.  I bought this radio from an ad in the Antique Radio Classified magazine in the early 1990s.

Tube Line Up:
6K7M...R.F. Amplifier
6A8M...1st. Detector / Oscillator
6K7M...I.F. Amplifier
6H6M...2nd. Detector / AVC
6C5M...Audio Driver
6F5M...Audio Phase Splitter
2 x 6F6M...Push - Pull Audio Output

Frequency Ranges:
LW Band (Green)...150 kHz - 380 kHz
BC Band (Cream)...540 kHz - 1800 kHz
P Band (Blue)...1.8 MHz - 6 MHz
SW Band (Red)...6 MHz - 18 MHz

Height...24.5 inches
Width...17.25 inches
Depth...10.5 inches

    The schematic for this radio can be found at the Nostalgia Air web site by clicking on the links below.

Power Source:
AC...110 Volts

Schematic and information

    Each band on the dial is etched into the glass and filled in with colored pigment.  When the dial is lit, the bands glow with neon like iridescence.

This web page was last updated: October 19, 2016