N O T E
Unless otherwise specified, all of the voltage read
ings were taken with a dc vacuum-tube voltmeter
having an input resistance of It megohms. The wave
forms shown were reproduced from actual photo
graphs. There will be considerable variation between
instruments because of normal manufacturing toler
ances and vacuum-tube characteristics. Therefore,
the significance of any discrepancies observed should
be determined by referring to the circuit diagram.
All readings are in volts unless otherwise specified.
W here two voltage readings are given, they represent
the voltage as read by a voltmeter under two sets of
conditions, and, as such, do not indicate the peak-to-
peak excursion of voltage at the point.
CIO
.01
C11
.001
MODIFICATION NOTICE FOR
TYPE 502
EFFECTIVE SERIAL NO 624
ADD C11 e001/<F 500V DISCAP 283-000
R11 47OK 1/2W FIXED COMP \0% 302-474
MODIFICATION NO 2165
PARTS LIST AND SCHEMATIC
MARCH 18, 1959
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