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1990-10-14
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900b
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32 lines
SB-847R
TS-830S Low Voltage Supply Optional Improvements 7-29-81
Power supply drift and stability may be improved by these optional
component changes and additions.
On the AF AVR unit X49-1140-00 (Vicinity of Q27-Q30) change:
R124 from 1K to 1.5K (RD14CB2E152J)*
R127 from 470 to 390 (RD14CB2E391J)*
R130 from 47K to 33K (RD14CB2E333J)#
D25 from WZ-061 to XZ-053 (V11-4101-60)*
*This will improve temperature drift from a maximum of about 100mV to a
maximum of 1mV, and may be applied to any unit before serial # 201xxxx.
Add two 22 k ohm 1/4 resistors (RD14CB2E223J0, one each across Q30, and
Q34, collector to emitter.#
#This will improve overall stability and may be applied to any unit before
serial #105xxxx.
Note: These changes are at the owners option and may not be performed in-
warranty.
JEB/sh
(c) 041482TKC