Figure 17. Tuning unit 1 if. input selector and if. step attenuator, schematic diagram.

Page Title: Figure 17. Tuning unit 1 if. input selector and if. step attenuator, schematic diagram.
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Figure 17. Tuning unit 1 if. input selector and if. step attenuator, schematic diagram.

by the same voltage as K1, and is energized

b. Output Circuit. The coil of relay K2

a t the same time. Feedthrough capacitor

c o n t r o l s the movable contact that selects

C79 is an rf bypass. Resistor R24 serves

the output of either T22 or T23 to feed if.

a s the voltage-dropping resistor in the

step attenuator AT1. This relay is activated

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