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In simplified diagram of Fig. VII-5 the amplitude fine control circuit is added.
By turning FINE control RV5, current 13 through Z342 is changed. For example,
if 13 decreases, the base voltage of Z334-Z335 will also decrease.
+20V
To RE 301 and P3
MA6492
To improve the switching properties of output transistor Z332 resistor R362 is
incorporated between base and emitter. Then the emitter current I] must have
a certain value to get a voltage across R362 exceeding the base-emitter voltage of
2332 before it can pass the transistor. The small base line shift thus obtained is
counteracted by a current through preset potentiometer RV302 with which the
zero level of a positive pulse is set.
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