Midland PRECISION 7001 - CB Range and Noise Factors; Frequency-Channel Chart Reference; Factors Affecting CB Radio Range; Identifying CB Noise Sources

Frequency-channel
number chart.
Frequency
Channel
26.965 MHz ....
1
26.975 MHz
2
26.985 MHz
3
27.005 MHz
4
27.015 MHz
5
27.025 MHz
6
27.035 MHz _ _ _.
7
27.055 MHz
8
27.065 MHz _. _
9
27.075 MHz
10
27.085 MHz
11
27.105 MHz
12
27.115 MHz
13
27.125 MHz .. ... .. .
14
27.135 MHz _
15
27.155 MHz
16
27.165 MHz
17
27.175 MHz
18
27.185 MHz
19
27.205 MHz ......
20
27.215 MHz .
21
27.225 MHz
22
27.255 MHz
23
27.235 MHz _.
24
27.245 MHz
25
27.265 M Hz __
26
• 27.275 MHz
27
27.285 MHz
28
27.295 MHz
29
27.305 MHz
30
27.315 MHz
31
27.325 MHz _
32
27.335 MHz
33
27.345 MHz.
34
27.355 MHz
35
27.365 MHz
36
27.375 MHz
37
27.385 MHz
38
27.395 MHz
39
27.405 MHz
40
Factors affecting
effective CB range.
Essential ly, they’re the same
influences that optimize or limit AM,
FM and other kinds of performance in
moving vehicles:
Terrain: Hills and valleys naturally
interrupt and shorten CB signais.
Weather. You can expect that CB
range will be reduced — perhaps
drasticajly — in times of atmospheric
disturbance, such as in a thunderstorm
or heavy snow. Sunspots, too, are
known to adversely affect CB
performance.
Obstructions. Inside a tunnel,
covered parking garage or viaduct, CB
transmitting/receiving capability may
be eut off altogether.
In short, you can expect to
maintain maximum transmitting/
receiving performance in flat, open
country in stable (not necessarily
elear) weather conditions.
Should effective range be limited
in these conditions, check to see that
your CB is connected properly and
your antenna adjusted correctly. It
may be necessary to consult your
Midland CB Dealer’s service
department.
What causes noise?
If you hâve an abnormal noise
problem, the chances are your vehicle
itself is the cause.
A CB receiver is a very sensitive
instrument, abîe to pick up small noise
signais and amplify them —
particularly if the source of these
signais is within a few feet of your CB.
Any noise that cornes from your
CB almost certainly cornes from '
outside the unit itself. Devices hâve
been designed into your Midland CB
(a noise blanker or an automatic noise
limiter, for example) to minimize this
kind of distraction.
Trouble-shooting aids.
Frequently, there are simple, quick
actions you can take to eliminate or
minimize such problems as
interférence and noise.