Communications For Your Astronomy Event - an Astronomy Net Article

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Communications For Your Astronomy Event
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Communications for your Astronomy Event
"Citizens Band Radio - The original"

by
John Huggins

Everyone has heard about the CB radio popularized in the 1970s by the romaticized trucking industry and movies like "Smokey and the Bandit."

The original Citizen Band frequency allocation from the FCC is in the 27MHz band. Cheap radios, AM modulation and license free operation made this a very popular communication for mobile users like truckers, and civic minded groups like REACT International who provide volunteer radio communications for events.

It is still around and is still strong, but the original CB band has degenerated into something less useful than it once was.

Also, because of the long wavelength, CB antennas (good ones anyway) are large by nature. The best antennas are from five to nine feet in length.

If you travel on the American highways, having a cheap CB radio in your car and a K40 five foot mag mount antenna on your roof is a smart move. Truckers are still the knights of the highway, and help can be found quickly if you can call them on their party line radio system - the CB radio.

CB Channel Plan

Well Known Channel Name	Frequency	Notes	Max Power
1	26.9650 MHz	AM and SSB operation allowed in the US	4.0 Watts
2	26.9750 MHz	AM and SSB operation allowed in the US	4.0 Watts
3	26.9850 MHz	AM and SSB operation allowed in the US	4.0 Watts
4	27.0050 MHz	AM and SSB operation allowed in the US	4.0 Watts
5	27.0150 MHz	AM and SSB operation allowed in the US	4.0 Watts
6	27.0250 MHz	AM and SSB operation allowed in the US	4.0 Watts
7	27.0350 MHz	AM and SSB operation allowed in the US	4.0 Watts
8	27.0550 MHz	AM and SSB operation allowed in the US	4.0 Watts
9	27.0650 MHz	Emergency use primarily. Monitored in some areas by "REACT" and/or other volunteers.	4.0 Watts
10	27.0750 MHz	AM and SSB operation allowed in the US	4.0 Watts
11	27.0850 MHz	AM and SSB operation allowed in the US	4.0 Watts
12	27.1050 MHz	AM and SSB operation allowed in the US	4.0 Watts
13	27.1150 MHz	AM and SSB operation allowed in the US	4.0 Watts
14	27.1250 MHz	AM and SSB operation allowed in the US	4.0 Watts
15	27.1350 MHz	AM and SSB operation allowed in the US	4.0 Watts
16	27.1550 MHz	AM and SSB operation allowed in the US	4.0 Watts
17	27.1650 MHz	Sometimes used by truckers in the western US states	4.0 Watts
18	27.1750 MHz	AM and SSB operation allowed in the US	4.0 Watts
19	27.1850 MHz	"Breaker 1 9" Yes, this is the classic trucker's channel (You might not want to let your kids listen)	4.0 Watts
20	27.2050 MHz	AM and SSB operation allowed in the US	4.0 Watts
21	27.2150 MHz	AM and SSB operation allowed in the US	4.0 Watts
22	27.2250 MHz	AM and SSB operation allowed in the US	4.0 Watts
23	27.2550 MHz	This use to be the highest CB channel - in the "Smokey and the Bandit" days ;-)	4.0 Watts
24	27.2350 MHz	AM and SSB operation allowed in the US	4.0 Watts
25	27.2450 MHz	AM and SSB operation allowed in the US	4.0 Watts
26	27.2650 MHz	AM and SSB operation allowed in the US	4.0 Watts
27	27.2750 MHz	AM and SSB operation allowed in the US	4.0 Watts
28	27.2850 MHz	AM and SSB operation allowed in the US	4.0 Watts
29	27.2950 MHz	AM and SSB operation allowed in the US	4.0 Watts
30	27.3050 MHz	AM and SSB operation allowed in the US	4.0 Watts
31	27.3150 MHz	AM and SSB operation allowed in the US	4.0 Watts
32	27.3250 MHz	AM and SSB operation allowed in the US	4.0 Watts
33	27.3350 MHz	AM and SSB operation allowed in the US	4.0 Watts
34	27.3450 MHz	AM and SSB operation allowed in the US	4.0 Watts
35	27.3550 MHz	AM and SSB operation allowed in the US	4.0 Watts
36	27.3650 MHz	AM and SSB operation allowed in the US	4.0 Watts
37	27.3750 MHz	AM and SSB operation allowed in the US	4.0 Watts
38	27.3850 MHz	AM and SSB operation allowed in the US	4.0 Watts
39	27.3950 MHz	AM and SSB operation allowed in the US	4.0 Watts
40	27.4050 MHz	AM and SSB operation allowed in the US	4.0 Watts

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Communications for your Astronomy Event"Citizens Band Radio - The original"

Communications for your Astronomy Event
"Citizens Band Radio - The original"