Question about Magnum 257 CB Radio

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Lost buttons/1 and 2FOR 257

HI,ANY IDEA WHERE I CAN PURCHASE REPLACEMENT BUTTONS 1and 2 AND RUBBER COVER FOR MY CHANNEL CHANGE KNOB/ 257/CHEERS

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Yes, if this is the Magnum 257, then contact the company at 1-877-624-6869
or e-mail them from their site,, https://www.rflimited.com/Site.asp?CID=2

Hope this helps you, let me know,,, Mechanic

Posted on Nov 05, 2008

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Will the 257 work on 11 meters/cb40 channels?


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.

Nov 01, 2010 | Magnum 257 CB Radio

1 Answer

The Magnum 80watt 257


go to cb tricks .com

Apr 20, 2010 | Magnum 257 CB Radio

1 Answer

I fogot how to put my converted 257 magnum into the lower channels and to have it read freq and channel


http://www.radiomods.co.nz/albrecht485magnum257mods.html

Good Luck,
Dodgem250.com

Oct 18, 2009 | Magnum 257 CB Radio

1 Answer

I am wanting to put my rci mic on my magnum 257. everything works accept the up channel button. can anyone help? Thanks Tom


the up down is done differently in the magnum compared to the ranger. it takes a 22k resistor for making it to go up. and ground is down. cb shop temple, tx on yahoo search... do that and should work. its all done off ONE pin not 2 like the ranger

Jul 05, 2009 | Magnum 257 CB Radio

1 Answer

257 Talkback


use a talk back ext. speaker.

Apr 12, 2008 | Magnum 257 CB Radio

1 Answer

Operator/instruction manual


ghilger, First off, has your radio been converted to open up all the other channels(including CB)?? That has to be done first, or it's locked in the ham freq's. I think the factory manual is pretty well detailed, but i've been around radios my whole life. The mode button does the changing from am/fm/usb/lsb.Here's from the manual;

MODE: Operating Mode. Press the MODE control to select the operating mode. The operating mode is indicated on the liquid crystal display: am, fm, usb, or lsb.
* See, there is 2 different functions for each button. One set of functions are by just pushing the buttons, the other set of functions are obtained by pushing the function button first. The function button is activated by pushing in on the clarifier knob.
*Here is for saving of freq's;

Memory Save. To save in memory a specific
frequency and operating mode, select the desired mode and rotate the FREQUENCY control to the desired frequency. Press the FUNC button, and then press the M.SAVE button. S will appear on the LCD next to the frequency. While S is displayed, immediately press any of the memory channel buttons (1 - 5). The mode and frequency is now saved into memory. If the S indicator disappears before you press the memory channel button,
the information will not be saved and the process
must be repeated.

M.LOAD: Memory(Recall). To recall, any of the saved memory channels press the M.LOAD
button. L will appear on the LCD for several seconds. While the letter is displayed press the desired memory channel button (1 - 5). The programmed mode and frequency will be displayed.,
If you have any more questions about the radio, repost them here and I'll try to walk you thru them. The radio is a very good ssb rig, especially set up with a power mic. Hope this helps,, Mechanic

Feb 03, 2008 | Magnum 257 CB Radio

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