Appendix C
Model 201C
Delete the following:
Disc assy, vernier drive; -hp-Part No. 50404607; Mfr. 2848O;TQ 1.
Sorine thrust; ho- Part No. 50004637;Mfr. 28480; TQ
(It is advisable to replace with current vernier drive assy.)
CHANGE NO. 6 Table of Replaceable Parts:
S3: Attenuator switch assy, w/pot; change to 201C-19A;
pot ody--hp-PartNo.21004115;
switch w/pot - -hp-Part No. 31004124.
CHANGE NO. 7 Table of Replaceable Parts: (see Figure 1)
Add R46: 390 kohms, hp- Part No. 0687-3941.
R9: Change to 2.4 kohms, hp- Part NO. 0689-2425.
R12: Change to 82 kohms, -hp-Part No. 069043231.
R14: Change to 1 kohm, -hp-Part No. 0693-1021.
R15: Change to 7.5 kohms, -hp-Part No. 08164007.
V1: Change to 697, -hp-Part No. 19234037.
V2: Change to 6K6, hp-Part No. 19234033.
22-26 VAC
AT 1000 CPS
T T
Figure 1
CHANGE NO. 8 Table of Replaceable Parts:
C12: Change to 4 section, 20 uF/sect, -hp- Part No. 01804025.
C12B: Change to 20 uF.
R27: Change to 33 kohms, -hp-Part No. 0693-3331.
NOTE
Stock No?s. in current manual may be used to improve hum and
distortion.
CHANGE NO. 9 Table of Replaceable Parts:
Rotary, switch, with pot: change to hp- Part No. 31004371 ;pot only, -hp- Part
No. 21004385.
Knob: change to -hp- Part No. 03704024.
CHANGE NO. 10 For Serials Prefixed 311-, 331- and35146108 and below only
Table of Replaceable Parts and Figure 5-8 Schematic:
Delete R46 |