HP 120A - Page 93

Serial 451 and above:
RJ09:
change to
resistor, fixed, composition, 4.7 megohms, +10%,
2 W; -hp- Stock No. 25-4. 7M; Mfr., B
R512:
change to
resistor, variable, composition, 5»5 megohms,
+50%, 1/2 W; -hp- Stock No. 210-150; Mfr., I
RJ15:
change to
resistor, fixed, composition, 680,000 ohms,
+10%, 1/2 W; -hp- Stock No. 25-680K; Mfr., B
Serial 551 and above:
ERRATA
R22J:
change to
resistor, fixed, deposited carbon, 1000 ohms,
+1%, 1/2 W; -hp- Stock No. 55-1K; Mfr., NN
■ ADD R200s
resistor, fixed, composition, 1000 ohms, +10%,
1/2 W; -hp- Stock No. 25-1K; Mfr., B
ADD C218:
capacitor, fixed, mica, 550uuf, +10%, 500 vdcw;
-hp- Stock No. 14-79; Mfr., Z
V102:
change from ’ ’ Same as VJ ” to
tube, electron, 12AT7; -hp- Stock No. 212-12AT7;
Mfr., ZZ
VJ AB:
change from 12AZ7 to
-
tube, electron, 12AT7; -hp- Stock No. 212-12AT7;
Mfr . , ZZ
R2J1 :
change -hp- Stock No. from 210-88 to
-hp- Stock .No. 210-210
Section IV, paragraph 4-1 Og
Attenuator Compensation
Set VERT SENSITIVITY TO 100 MILLIVOLTS/CM etc.
......Switch Vertical sensitivity to 10 V/CM and increase input
to give 8 cm deflection. Adjust C18 for flat response. (ADD
THE UNDERSCORED LINE IN THE MANUAL). Should be ....