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Magnum Delta Force distorted SSB modulation when cold.
My radio does not like low temperature. When cold (e.g. less than 50
deg. F), the SSB modulation is bad. Its a sort of brumming noise superimposed on the audio. Strange, if I change to AM or FM, the modulation is good, under same low temperature conditions. So, it seems that the microphone is OK. What I do now is to heat the radio using a hair drier until the SSB modulation is OK. In a cold room, I need to do this every 15 minutes or so. Any ideas of what causes this, or how to fix it? Thanks, Julian |
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