The 670T, sister radio to the Westinghouse WR-214, was the largest table model radio, and the only tombstone radio, American Bosch offered in 1937.  It used the same chassis that the 670C console used.  The most noticeable feature about this radio is it's large, multi colored, glass tuning dial.  Each of the four bands are in a distinctive color and the shadow-tuning indicator, with the aid of a color wheel, illuminates in one of the four colors in accordance to which band the radio is switched to.  Today the 670T radio is considered fairly rare, which is ironic when compared to the next model down, the 660T, which seems to regularly show up in various radio ads, auctions and swap meets.  I purchased this radio through an ad in the Antique Radio Classified magazine in the early 1990s.

Tube Line Up:
6K7G...R.F. Amplifier
6A8G...1st. Detector / Oscillator
6K7G...I.F. Amplifier
6H6G...2nd. Detector / AVC
6C5G...Audio Driver
6F5G...Audio Phase Splitter
2 x 6F6G...Push - Pull Audio Output
5Y3...Rectifier

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

Measurements:
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.

Click here to view the American Bosch factory complex on TerraServer.

Schematic and information