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Figure 14. Power amplifier A29, schematic diagram.
ratio of capacitance change on the high
L1 (low band) or capacitor C4 (high band)
band.
through switch SIB, through pin 3 of 2AJ1
and pin 9 of J7 to receiver first rf ampli-
fier module A3.
21. Antenna Looding Network A28
c. On the low-band tuned circuit, the slug
in transformer T1 is an alignment adjust-
The antenna loading network matches the
ment for the low frequency end, while
short or long antenna to the receiver-
capacitor C1 is an alignment adjustment
transmitter by means of tuned coils and
for the high frequency end. Inductor L1
switching assemblies.
provides high-impedance coupling for the
a. When the long antenna is used, a
receiver to minimize effects of lead length
plunger and a leaf spring engages micro-
and to reduce spurious responses and
switches S2 and S3, closing contacts 2 and
3 on each switch. The rf signal is applied
d. On the high-band tuned circuit, the
through contacts of BAND switch S1 to the
slug in transformer T2 is an alignment
power amplifier tank (C2A stator) (fig.
adjustment for the low frequency end,
88). Inductor L4 is inserted in parallel to
while capacitor C2 is an alignment adjust-
change the electrical length of the antenna
ment for the high frequency end. Capacitor
during operation in the low band.
C4 provides high-impedance coupling for
b. When the short antenna is used,
the receiver on the high band. Capacitor
microswitches S2 and S3 are not actuated.
C5, in conjunction with capacitor C4, pro-
The rf signal from the antenna is applied
vides the proper impedance matching to
directly to switch S1. When the short an-
the receiver. Capacitor C3 is connected
tenna is used inductor L4 is not connected.
in series with C2B by S1C to reduce the


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