Automatic Tuning - Hudson 480-490 Series Service Manual

480-490 series
Table of Contents

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38 BODY MANUAL
18. IMPORTANT: Turn the receiver on and allow it to
operate for approximately fifteen minutes in order for
it to reach normal operating temperature. Tune in a
weak station near 1200 KC. With a small screwdriver
adjust the antenna trimmer, located on the right side of
the receiver, for maximum volume (Figure 36).

AUTOMATIC TUNING

There are six automatic tuning positions, each of which
may be adjusted to any desired station. In order to
simplify the identification of the stations, it is advis-
able to set the automatic tuning mechanism in sequence
according to frequencies of the stations, beginning with
the station broadcasting on the lowest frequency and
progressing to the station broadcasting on the highest
frequency.
FIGURE 36
If the positions have not been previously adjusted, pro-
ceed as follows:
1. Loosen the first push button by turning it counter
clockwise with your fingers.
2. Turn the manual tuning control knob (Figure 34) to tune
in the desired station. Carefully tune to the middle of the
signal for clearest reception.
3. Push the first push button in as far as it will go. Release
the button, and tighten securely by turning it clockwise
with the fingers.
4. Repeat the above procedure for the remaining five push
buttons.
NOTE: See next page for instructions on radio
interference elimination.

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480 series490 series

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