199 lines
10 KiB
Plaintext
199 lines
10 KiB
Plaintext
=========================================================================
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Another original file presented by Sine Wave.
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Sysop of The Grey Zone BBS 205-774-7453
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=========================================================================
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ALL-BAND TRANSMIT MODIFICATIONS
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During a widespread emergency, it may become necessary to transmit on
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specific frequencies to signal for help or to pass emergency radio
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traffic. These frequencies might be monitored by the Civil Air Patrol,
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the National Guard, United States Coast Guard, the military, or other
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public safety agencies.
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The well-equipped survival station should have complete access to
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receive all frequencies on the shortwave band, as well as many
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frequencies in the VHF and UHF spectrum. Modern worldwide amateur radio
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epuipment not only tunes in the ham bands, but also allows for general
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coverage receive, and with modification, general coverage transmit.
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Modern VHF and UHF ham radio walkie-talkies also allow for VHF and UHF
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public safety band receive as well as public safety band transmit with
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the proper modification.
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Before we get into modification details, let me first point out that
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using frequencies without FCC authorization could result in stiff
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penalties. This could include imprisonment, a $10,000 fine for every
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day you are transmitting on the air, and the confiscation of your
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equipment. The only time you are allowed to use frequencies that you
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are not authorized is in a real emergency when safety of life or
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protection of property is an immediate threat. Possessing equipment
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that has been modified and is capable of transmitting outside of normal
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ham radio band limits is not necessarily illegal--but just as soon as
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you press the microphone in a non-emergency situation outside of your
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authorized frequencies, this indeed is not allowed. Just remenber that
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operating on frequencies without specific FCC authorization is simply
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not legal except in an emergency.
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The popular Yaesu 757 high frequency transceiver is easily modified
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for all-band transmit. Simply locate the tiny white switch that is
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hiding under a wire bundle inside the top front of the set near the
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frequency selector mechanism. Simply slide the switch in the opposite
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direction, and your transmitter is now unlocked.
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Yaesu 2-meter hand-helds are not capable of going beyond their normal
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2-meter range, well outside of normal ham or MARS limits. You cannot
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extend it into the 150MHz region.
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The ICOM 02-AT 2-meter hand-held and the Kenwood 2600 hand-held will
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both go into the 150 MHz range if some modifications are made.
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On the Kenwood 2600, locate the two diodes standing on end with
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Teflon covering the top part of their leads (which at one time were
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soldered together, broken, and then resoldered). Simply clip these two
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leads to unlock the transmitter, but be sure to reset the microprocessor
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by pushing the reset button before the set is capable of transmitting on
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any frequency at 150 MHz.
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On the ICOM 02-AT, as well as on the ICOM 04-AT for VHF and/or UHF
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work, both units require semi-major diode surgery for frequency
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expansion. For VHF, two diodes are removed and three are added for the
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ICOM 02-AT to extend all the way up to 165 MHz. For UHF work, two
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diodes are added to extend the range of the ICOM 04-AT. The
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modification is tricky and a bit complicated. (Ten dollars to Radio
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School, 2414 College Drive, Costa Mesa, California 92626, brings you all
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the instructions plus all the diodes needed for either the VHF or UHF
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mod.)
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The popular Kenwood TS430S is modified for all-band high frequency
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transceive operation by unplugging the 3-wire plug on the RF board that
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mates with socket 10. When looking at the front top of the radio, it's
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to the left front side right beside a larger white plug. You'll need to
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carefully examine the circuit board and locate the number 10 witha
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circle areound it to insure you have the right plug.
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On the brand new ICOM 735, to unlock the transmitter you simply cut
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diodes D33 and D34 that are standing on end near the microprocessor
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section toward the rear top of the radio.
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On the ICOM IC-745, locate the RF board on the side of the radio and
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cut the light brown wire at jack 7, which is going to pin 1. Your
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transmitter is now unlocked.
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On the IC-751, locate the RF board on the side of the radio and cut
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the black wire going to pin1 of jack 2. Your transmitter is now
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unlocked.
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On the big Kenwood 940 base station, locate IC number 109. Now find
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diode 130 and cut it for all-band transmit. If you want just MARS
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coverage, locate IC 111 and 112, and snip diode 135 beside it.
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On the Kenwood 930, the all-band transmit modification is a bit more
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lengthy--several jumpers are required which is beyond the scope of this
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article. Perhaps if response is good i'll prepare an article on that
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specific radio.
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None of the 2-meter mobile sets are easily converted to 150 meg
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frequencies. Many people have tried all sorts of modifications, but
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the best they can get is 149.99--and nothing higher.
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The ICOM thumbwheel VHF set, IC 2AT, can also be modified for 150
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MHz transceive; but once you make the mod, you lose all of your 2-meter
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frequencies. You would be better to simply go out and buy a
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type-accepted VHF transceiver as opposed to ruining your present 2-meter
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ICOM IC 2AT set!
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The older high frequency radios with VFO tuning (as opposed to PLL
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tuning) do not easily allow any type of modification for expanded
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transmit or receive coverage. It would require so much modification
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that you would be ill-advised to try and step up any Yaesu FT101 series,
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980, Kenwood 120, Kenwood 520, 820, or any of the old ICOM sets.
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For the old ICOM 720, the transmitter is unlocked by snipping the
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blue wire that's at the very end of the top hatch cover to the left
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middle side of the tranceiver.
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On the ICOM M-700 marine transceiver, the sets are already capable of
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working on ham radio frequencies. Despite what the literature says, no
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lock-out is employed because the factory already did their diode trick.
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Simply punch in the frequencies and you're on the air. Remember, any
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ham frequency on 40, 80, or 160 meters requires the mode switch to be
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put to the hard left positions of "A3," which enables the lower sideband
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filter. All other frequencies to include all marine frequencies are
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upper sideband--including those marine frequencies at 2, 4, 6, and 8
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MHz. All marine is upper sideband.
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The well-trained survivalist will know the radio frequency band well
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to include radio operating procedures for different services. This will
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assist you if it becomes necessary to signal a radio call on these bands
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in an emergency.
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Today's modern ham radio equipment gives us complete access to roam
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the airwaves and eavesdrop on almost any type of radio communications
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that are out there, on the air. CRB Research, P.O.Box 56, Commack, NY
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11725, offers numerous confidential frequency lists of those agencies
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you may wish to tune into with your general coverage amateur radio
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transceiver to gain more information about local emergencies and local
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happenings. Write for their big free catalog.
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While it's not illegal to modify amateur radio equipment for all-band
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transmit, it is illegal to use it if it's not an emergency. While you
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may possess a valid citizen's band radio license, using non-type
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accepted equipment on these bands is also not allowed, except in an
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emergency.
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Although you may possess a marine radiotelephone license or an
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aeronautical license, using non-type accepted epuipment is also not
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allowed, except in an emergency.
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Take your time when modifying equipment, and use modified equipment
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outside of your regular band limits only in an emergency situation.
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Enjoy.....
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Sine Wave
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ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
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º Downloaded from The Grey Zone BBS 205-774-7453 19,200 bps º
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º VGA graphics, Printer utilities, CAD programs, Space/Aviation, º
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º Artificial Intelligence, Assemblers, Home control via computer, º
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ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
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ÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜ
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X-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-X
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Another file downloaded from: NIRVANAnet(tm)
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& the Temple of the Screaming Electron Jeff Hunter 510-935-5845
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Salted Slug Systems Strange 408-454-9368
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Burn This Flag Zardoz 408-363-9766
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realitycheck Poindexter Fortran 415-567-7043
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Lies Unlimited Mick Freen 415-583-4102
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Tomorrow's 0rder of Magnitude Finger_Man 408-961-9315
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My Dog Bit Jesus Suzanne D'Fault 510-658-8078
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Specializing in conversations, obscure information, high explosives,
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arcane knowledge, political extremism, diversive sexuality,
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insane speculation, and wild rumours. ALL-TEXT BBS SYSTEMS.
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Full access for first-time callers. We don't want to know who you are,
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where you live, or what your phone number is. We are not Big Brother.
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"Raw Data for Raw Nerves"
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