Timmy Debug: No volume with gain at minimum

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Timmy Debug: No volume with gain at minimum

Postby jwhk » 08 Jul 2014, 02:26

Hey everybody! :) Long time lurker, first time poster here. . . Thanks in advance for your help! The title says it all. I just built a Timmy from Nocentelli's attached layout for a mini Timmy, and whenever I turn the gain to minimum there is no sound at all, and with the gain at maximum there is hardly overdrive. The sound is also lacking the transparency that my real Timmy had, and sounds weak for the lack of a better word. I checked the wiring, solder joints, and voltage to the pins, and those all check out fine. Any one have any suggestions?
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Re: Timmy Debug: No volume with gain at minimum

Postby Nocentelli » 08 Jul 2014, 05:30

the layout is verified, so the standard advice is to carefully debug your build to identify the fault. start by checking all the cuts, jumpers and components are correctly positioned and parts soldered in properly, and if this doesn't reveal the problem, measure the voltages at all the IC pins and post them up.
mmolteratx wrote:absolutely zero commercial use allowed. If I find anyone selling these, I'll fly to your house and kick you in the nads. And you may or may not find yourself in trouble.
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Re: Timmy Debug: No volume with gain at minimum

Postby Nocentelli » 08 Jul 2014, 05:46

it just occurred to me that the bass and treble controls are shown wired to work as one would expect normal bass and treble controls to work, i.e. turning them up (clockwise) gives you more. this is the opposite way to how the original timmy works. so if you've turned gain, treble and bass all the way down, you won't get the flat EQ/clean sound of the OG timmy. you'll have cut serious amounts of bass and treble. just check: with the gain at zero and bass and trebleat maximum, it should be completely clean, with flat eq, and unity gain should be around one/two o'clock on the volume pot.
mmolteratx wrote:absolutely zero commercial use allowed. If I find anyone selling these, I'll fly to your house and kick you in the nads. And you may or may not find yourself in trouble.

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