RADIOTRON
Model WD-11
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RATING
	Filament Volts		1.1
	Filament Amperes	.25
	Plate Volts (Maximum)	135
GENERAL
   The WD-11 Radiotron is a high vacuum tube designed
for use as a detector, radio and audio amplifier, being
intended prlmarily for dry cell operation.  The con-
nections for the WD-11 elements to the contact pins in
the base are shown,  in  the diagram below.

MOUNTING
    The Radiotron WD-11 should be mounted vertically,
with the base downward wherever possible. It is also
desirable to use cushion  supports, especially when this
Radiotron is used as a detector.

FILAMENT SUPPLY
    The filament of the WD-11 is oxide coated and gives
great electron emission at low temperature, at whlch it
is designed to operate. At its rated voltage the filament
will glow  at a dull red heat, usually invisible in daylight
and frequently barely visible in darkness. lf the fila-
ment voltage, which is controlled by the rheostat, is
allowed to exceed its rated value, the Radiotron may be
permanently damaged.
    While the WD-11 Radiotron may be operated from
one dry cell, greater battery economy will be realized by
using two cells per Radiotron. All "A" battery cells
should be connected in parallel so that the total "A"
battery potential remains at 1.5 volts.
The recommended rheostat resistance for one 
Radiotron is 6 ohms.

CONNECTIONS

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