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Post subject: Guitar to amp cable acts like an antenna
Posted: Fri Dec 03, 2010 7:19 pm
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When I first turn the amp on (with guitar/cable connected to the amp) there is a loud hum from the speaker. Remove the cable at the amp end and hum goes away. This happens on a LOT of the different selections on the amp. These presets are unusable. Connecting the guitar cable to the rear of the amp does the same, but at a slightly lower level. Sounds like 60 cycle hum and if left on, will break into oscillation and the dog starts to howl. Selecting input like #21, 54, 27, 77, 87 all work just fine, but I'd like to explore the remaining 90 or so presets. I changed cables - no difference.

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Don


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Post subject:
Posted: Sat Dec 04, 2010 8:09 pm
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Try lowering the gain and volume on the presets and see if this helps. Some of them are on the high side for my taste. Also make sure you are using a quality cable.


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Post subject:
Posted: Sat Dec 04, 2010 8:54 pm
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Sounds like bad cable possible in combination with some bad lighting circuits with fluro lights... they can sometimes cause an amp to hum.


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Post subject:
Posted: Wed Dec 08, 2010 9:02 am
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http://mygdec.com/index.php?option=com_ ... 9&Itemid=2


Found the answer to my question.


don


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