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PHILIPS
D
'—
Electron optics /Nuclear and electrochemical
equipment / X-Ray analysis /Cryogenic
equipment /Test and measuring equipment /
Process instrumentation /
Industrial Data Processing Systems /
Weighing /Welding /Numerical Control /
Textile equipment
_
15-4-1969
industrial
equipment
division
PM 3342/05
Cd 620
TEST AND MEASURING EQUIPMENT
Contrary to service information Cd 608, dual trace plug in unit PM 3342/05 obtained during
manufacture FET-input circuits to minimise DC-drift. They are incorporated in 2 printed
circuits, replacing the EC 1000 cathode -followers and compensating tubes previously used.
The printed circuits are separately available for modernising old type plug-ins (see enclosed
instructions.)
Further changes are:
1. C401 is replaced by a 6 pF trimmer paralleled by a 6. 2 pF cer. capacitor.
2. The value of R238, R246, R338 and R346 has been changed to 510 S2.
3. The value of R242 and R342 (68 S2) has been changed to 82 S2
4. The value of R419 (180 S2) has been changed to 56 S2.
5. Capacitors C205 and C305 have been added; C213 and C313 have been removed. The value
of R252, R257, R352, R357 (33 52) has been changed to 120 52; the value of R242 and R342
(68 S2) has been changed to 82 St.
No changes were made in the specifications or in the adjustment procedure. A revised dual
trace circuit (fig. 20) and Y-amplifier circuit (fig. 21) have been added.
9499 448 03501
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