Question about Magnum Radio Communications

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Usb audio Hi...I have a Magnum 257 which tx and rx fine, the problem is when im on USB people tell me the audio is distorted or clipping out. When I go to LSB the audio is perfect, AM and FM are also fine, just problems with USB. Any help plz

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Need to put it on an oscillascope and frequency counter and have it aligned. even taking to a shop should be less than $45 to have it fully done.

Posted on Apr 01, 2014

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Posted on Jan 02, 2017

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SOURCE: magnum 257 it will not transmit on lsb or usb it will on am and f

With SSB you have to put audio on the carrier you cant just key the microphone and expect it to output a signal unless you talk into the microphone at the same time this is how SSB works.
So if you talk and the meter starts to move then its ok, if you talk or whistle and nothing moves then the circuit on the SSB side of the unit is faulty.

Posted on Feb 07, 2009

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So if you talk and the meter starts to move then its ok, if you talk or whistle and nothing moves then the circuit on the SSB side of the unit is faulty.

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Colin, here is all the tech info on alignments that your looking for,,,go here;
http://www.cbtricks.com/radios/rflimited/magnum_257/index.htm

Hope this gets you on the right track,, let us know.
Mechanic

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