in
oak cabinet with ebonite top. The "spider web" coil
in the door, combined with another coil in the right
hand side of the cabinet can be used for feedback
control.
Listen to "Si
Fatigué"
sung by Maurice Chevallier, recorded in 1924, Paris
Knobs
on top, left and right: coarse tuning; middle front:
rheostat, middle back: switch that enables use with 3 or
4 valves. Knobs at the front: left and right: secondary
and primary tuning. Middle below: wave length switch.
Middle top: fine tuning of the regeneration circuit.
Behind the tubes binding posts for antenna, earth, power
(4 and 80 volt) and loudspeaker.
The
coil in the right hand side of the cabinet is part of an
absorption circuit, that can be tuned, using the big
knob in the middle of the front of the radio. The
antenna's energy is "sucked away". Feedback, using the
little door on the right is not very precise; the
additional circuit can be used as fine tuning of the
feedback circuit. This coil has a "top" position.
Turning it also means turning the direction of the
current in the circuit. In a normal coil this is not the
case, as turning it 180 degrees the connectors are
turned together with winding direction of the coil. The
direction of the current will not be changed. Turning
this extra coil will not have a big effect, but it
explains the word "haut" (this side up) written on the coil.
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