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    Building, troubleshooting and testing of these amplifiers should only be
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    the safety precautions around high voltages.

Adjustable Line out off of Extra Speaker Jack

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I have plans of a line out that uses a 100 ohm resistor across the speaker jack terminals and then a 2.2K one in line with the positive terminal this is supposed to be parrallel to the speaker out jack with a speaker plugged in for it to work. This is supposed to be good for going to a mixer or an other amp. I have seen references to a set up like this only a pot is added to adjust the output so in case your over driving an input you can turn down the output. Anyone know how the pot is added or where plans are for this on the net. I see some outfit is selling such a gizmo but I have all the parts to make one except for the pot and what value it is and were to add it. Can any one help with this?
 
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