Question about Galaxy Radios DX-33HML 40-Channels Base CB Radio

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This old Galaxy has good carrier but no modulation

A friend of mine broght his radio to me said the radio keys up but no one can here him, I put it on the power supply and hooked it up and sure enough no modulation, which chip is the audio chip? I looked and it could be c133, or tr34 or tr53, but I am curious, because I don't know where to start. hope someone has fixed this before, thanks,

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Check mic lead first if all right contact me on appleby.norman@yahoo.co.uk

Posted on Jun 17, 2009

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  • Check that power cord up by the tip. It is possible it is a little loos in the tip (that hooks into the radio) Being new it almost has to be related to the power feed.
  • Make sure the fuse you are using is good. Use a 4 amp fuse in there.
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By keying the mic without an antenna connected you are creating high VSWR which is hard on the radio. It reflects power back into the radio and pounds the power amplifier. The reason the radio is staying on is likely it takes less power without the antenna connected. While examining the radio, double check your antenna connections and coax.

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Thanks and please take a moment to rate as fixya. Thank you.

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