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Hey,
The magnum S9 is factory set for the 10 Meter band but can be "tweaked" to get up into the 11 meter band...
check out this neat and easy mod: http://www.radiomods.co.nz/magnums9mod.html
Its very easy on this radio because it has a built in frequency counter. I can't remember off the top of my head but its most likely band letter A, then turn the channel selector to 19. If you are on the CB channel 19, the frequency counter will read 27.1850.
If band A channel 19 is not 27.1850 then leave the channel selector on 19 and flip through the band letters until it reads 27.1850. once you have found it, that letter is the CB band. channels 1 - 40 of the cb band.
The Magnum 257 is a 10-meter Amateur radio, but it can be easily modified to operate on the 11-meter CB radio band. The modification and use of this radio on the CB frequencies is, of course, illegal. To modify one of the newer blue-faced models (this will not work on the original yellow-face models), remove the speaker side cover and look for the CPU board in the front of the radio close to the mic connector. This board has four sets of pins and a jumper that fits on the pins. To convert/expand the radio, move the connector to the CON3 position. This will give you frequency coverage from 25.165 to 29.699 MHZ, and the CB frequencies will be on Band E of the radio. Again, this modification, and use of the radio on the CB frequencies, is illegal. This modification information is provided for shop/calibration and experimental use only.
There is no factory made 10 meter CB Radio made for US use. CB Radios use 11 meters, and the FCC doesn't allow the combination of 10 and 11 meter radios combines. Although, many people modify 10 meter radios to work on the 11 meter ( CB ) band, it's not legal. Good Luck
Ed
NC Electronic
Mills, Wyoming
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