Model 204R
@
MANUAL BACKDATING CHANGES
AppendixC
1
135-00276 to -00421* 1, 2, 3. 4, 5
1.
2. 3, 4. 5, 6
,
244-
1.
2 135-00101 to -00275
233-
1.
2. 3
208-
1.
2.
3. 4
MODEL 204B
OSCILLATOR
Manual Serial Prefixed: 416-
Manual Printed: 6/64
To
adapt this manual to instruments with other
serial
prefixes check for
errata
below, and make
changes shown in tables.
NOTE
This backdating manual change sheet makes this manual applicable to the earlier
instruments. Instrument-component values that differ from those in the manual,
yet are not listed in the backdating sheet, should be replaced using the stock
number given in the manual.
CHANGE #1 Paragraph 5-22, step b
add: Counter weight on pot will come off
at
this time.
delete:
@
Stock No. 204B-l08E, cam plastic: pot and dial
Table 6, MISCELLANEOUS
CHANGE #2
CHANGE #3
CHANGE #4
01369
-
1
Paragraph 5-14, step b
Add 1st sentence: Top and bottom covers must be removed
first
in order to
reach the nuts on the bolts holding the side covers.
Change to read: Slide foot release of rear foot assembly towards center of
bottom cover,
Paragraph 5-14, step d
Change to read: Slide foot assembly toward side and lift to remove.
Table 6, MISCELLANEOUS
Cover, half recess top: change
@
Stock No. to 5000-0706
Cover, bottom: change
@
Stock
No.
to 5000-0710
Cover, side: change
($3
Stock No. to 204B-44A-1
Foot Assembly, third module: change
@
Stock No. to 5060-0725
Paragraph 5-14, step c
Table 6 and Figure 5-9
R14: change to Resistor, fixed, comp, 22
S2
*5%,
1/2
W,
@
Stock No. 0686-2205
R13: change to Resistor, fixed, comp,
.27
S-2
*lo%,
1/2
W,
@
StockNo. 0687-2701
R11: change to Resistor, fixed, mfgl, 1K
S2
f1%,
1/8 W,
@
Stock No. 0757-0029
R9: change to Resistor, fixed, comp, 33
S2
*5%,
1/2 W,
@
Stock No. 0686-3305
R4: change to Resistor, fixed, mfgl, lKS-2
*l%,
1/8W,
@
Stock
No.
0757-0029
92:
change to Transistor, 2N1516/OC170,
@
Stock No. 1850-0003
Table 6, Change to Assy dial to
@
Stock No. 204B-40A
Table
1-1,
Frequency Range: Change to 5 cps to 500 kc in 5 ranges
R51: change to Resistor, fixed, comp, 12KS-2 !~10%, 2W,
@
StockNo. 0693-1231
Supplement
B
for
204B-904 iC-1
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