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Volume pot problem

I soldered up 2 "Little Gem" 1 watt amps and both have strange volume pots... I used all the components required and followed schematics exactly... I've made these before. This time the volume works fine at full volume, but when I turn it down a little it drops off fast and is completely gone after about 1/8 turn. What gives? I cannot figure it out.

http://www.instructables.com/id/The-Little-Gem-Mini-Amplifier-Guita...

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Permalink Reply by mojoatomic on July 10, 2014 at 12:08pm

Are they linear or audio taper? I'll bet they're linear if there's a sudden drop off.

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Permalink Reply by Eric Kasten on July 10, 2014 at 1:10pm

LInear... I think I ordered linear because the gain was linear... I need to get audio don't I...?

5K Linear Gain POT
25 Ohm POT (Volume) - [this is optional]

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Permalink Reply by Eric Kasten on July 10, 2014 at 1:10pm

I must have ordered the audio taper ones previously....

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Permalink Reply by mojoatomic on July 10, 2014 at 1:45pm

Linear for tone, gain, presence, ect, and audio taper for volume.

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Permalink Reply by Eric Kasten on July 11, 2014 at 12:23am

Will do. Thanks guys!

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Permalink Reply by Eric Kasten on July 11, 2014 at 12:49am

How much difference is there between a 5KA, 25KA, 100KA...???

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Permalink Reply by Eric Kasten on July 11, 2014 at 2:12am

I see up to A500 on ebay... If schematics call for A25K can I use an A250K? I don't know....

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Permalink Reply by Eric Kasten on July 11, 2014 at 7:27am

Yeah. I'm just using it as an example. But since I'll be away for a week on vacation... whatever I order should be waiting for me when I get back... :)

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Volume pot problem

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