Catalogue
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Experimental Two-Valve Set, c. 1916
Inventory Number: 94035
Date: c. 1916
Maker Details: Unknown
Inscription: "80 METRES / REAR" stamped on long side of case.
Size: 285 x 160 x 105 mm (excluding terminals, dials & switch)
Materials: Ebonite, teak, brass.
Other Given Number(s): Christie's 125, 810/3 (white tag).
Notes:
Experimental Two-Valve Set, with send/receive switch, inductance tuner, numerous brass & ebonite terminals, and two-valve blocks made from ebonite blocks formerly components of a Robert Paul Forward Spark Receiver. Inductance tuner has scale of 0-50 and "FILAMENT CURRENT INCREASE ->" stamped on upper surface of dial. Terminals on sets include those marked "TRANSMITTER / (AERIAL AND E / TERMINALS)", "+/- 4 VOLTS", "L.R. / PHONES", "EARTH MAT." and "AERIAL / (45 FEET)". Teak case with rear hinges, front hooks and side knobs; missing lid and possibly side strap. Previously catalogued with other Experimental Two-Valve Set (Inv. Num. 76048) and Telephone Jigger Box (Inv. Num. 89862).
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