106 lines
4.8 KiB
Plaintext
106 lines
4.8 KiB
Plaintext
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TUNING IN THE OVERLOOKED BAND
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29.70 - 30.00 MHZ.
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From Popular Communications July of 89
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Reprinted by John Johnson, KWV8BP
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Small as it is, the band contains several discrete sub-bands. Base and Mobile
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systems throughout the world are allocated between 29.70 and 29.80 Mhz. In
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the U.S.A. only, the forest products industry (logging operations, paper
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mills etc.) may use this band on odd-numbered frequencies (20 Khz. spacing,
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NBFM mode). For example, the International Paper Co. bases throughout the
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southeastern states and in Texas are on 29.73 Mhz. Frequencies in this group
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are: 29.71, 29.73, 29.75, 29.77, and 29.79 Mhz.
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In Canada, just about any business or local government operation can pop up
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on the even-numbered frequencies (20 Khz. NBFM mode). For instance, the
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Quebec Ministery of Public Works operates on 29.76 Mhz. (French language).
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Frequencies in this group are: 29.70, 29.72, 29.74, 29.76, and 29.78 Mhz.
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The United Kingdom allocates frequencies in this band to tactical military
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communications (25 Khz. spacing AM mode) Some really HOT comm. can be
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monitored here , frequencies to check are: 29.70, 29.725, 29.75, 29.775,
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29.80, 29.725, 29.85, 29.875, 29.90, 29.925, 29.95, and 29.975 Mhz.
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Mexico has a string of half-duplex radio telephones in this band (15 Khz.
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spacing, NBFM mode). Operating at: 29.70, 29.715, 29.73, 29.745, 29.76,
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29.775, and 29.79. The frequency 29.775 Mhz. sometimes runs parallel with
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31.53 Mhz. 29.775 remains on the air several seconds after 31.53 Mhz. shuts
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down.
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Other nations have their own special uses for the 29.70 to 29.80 Mhz. band. A
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full duplex mobile phone service operates on 29.74 Mhz. using Spanish. Its
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location is unknown. Theres a West Indies radio pager (English language)
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operating on 29.715 Mhz. The two way communications of business is San Luis,
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Argentina is heard on 29.76 Mhz. A displaced 10-meter ham band turned up on
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29.74 Mhz. calling "CQ 10," and theres also an international "outbander" net
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on that frequency at times.
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A taxi service in New York City bootlegs on 29.79 Mhz.
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The sub-bands 29.80 to 29.89, and 29.91 to 29.995 are known as International
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Fixed (point to point) Public bands. They're allocated for high powered
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ionospheric scatter telemetry between land station, or from land stations to
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aircraft. These stations run thousands to ten thousands of watts. Most of the
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power passes through the ionosphere and heads into space. A small amount
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though, is reflected off random patches of ionization in the E layer,
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resulting in skip distances between 450 and 1,500 miles. Even when the Muf
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(Maximum Usable Frequency) is below 29 Mhz., reliable communications on
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several non-voice channels (or one voice channel) are possible. These
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Channels are spaced at 10 Khz. intervals. They are: 29.81, 29.82, 29.83,
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29.84, 29.85, 29.86, 29.87, 29.88, 29.92, 29.93, 29.94, 29.95, 29.96, 29.97,
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29.98, and 29.99 Mhz.
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It seems as if there are only four stations in the U.S. authorized here, all
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for press agencies. RCA Global Communications bases in New York City and San
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Francisco on both 29.96 and 29.97 Mhz. ITT World Communications has bases at
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the same locations on 29.84, 29.85, 29.87, 29.88, and 29.94 Mhz.
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There are apparently some government contractors authorized to operate here,
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too.
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The following is a log of some of the things to be heard on this band.
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29.80 Soviet military (Cuba), clear and scrambled Non-voice signalling,
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AM.
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29.805 Whistler-type radio phone (Mexico)
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29.82 Non-voice signalling, AM radio phones, (Mexico)
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29.825 Drug courier, full duplex, Spanish/English (Miami, FL)
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29.835 Whistler-type radio phone, (Mexico)
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29.84 Base/mobile business radio (Mexico)
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29.845 Full duplex radio phone, Spanish (Mexico)
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29.85 Military Op's, Spanish language (Central America)
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29.86 Whistler type radio phones (Mexico)
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29.875 Whistler type radio phones (Mexico)
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29.88 Outbanders, Spanish language, AM
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29.885 Full duplex radio phone, Spanish language
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29.89 Whistler type radio phone (Mexico) Outbanders, Spanish Lan. AM
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29.91 Outbanders, Spanish language, AM
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29.92 Outbanders, Spansih language, AM Full duplex radio phone, Spanish
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lan
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29.93 Full duplex radio phone, Spanish language. Outbanders, Spanish
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Lan.AM
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29.94 Outbanders, Spanish language, AM
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29.95 Soviet military (Cuba) clear and scrambled
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29.96 Outbanders, Spanish language, AM
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29.97 Outbanders, Spanish language, AM
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29.98 Outbanders, English language, NBFM (California)
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29.995 Two-way business, Guatemala
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This file was brought to you by John Johnson of the Hotline BBS, give us a
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call, we have an entire section devoted to Scanner & Radio related topics.
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The Hotline BBS 304-736-9169 or 304-743-7909
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