Rebuilt Spirit Box Static Noise

C

coachseeley

Member
Greetings,
I couldn't troubleshoot a Spirit Box a buddy of mine tried to build, so I ordered a new board and repopulated it only reusing the ICs, PT2399, pots and Belton Brick. It was a bugger to get the Belton Brick out of the old circuit, and I want to verify the new build works before I solder it in. Belton Brick is making contact with pads, but not soldered in. I'm getting a fizzy tail at the end of the tone. When I touch the pots, it makes a popping/scratching noise almost like the sound an old preamp tube makes. When I dime the depth knob, it almost oscillates into feedback. Could it be the circuit is not shielded enough? Could the Belton contacts not be 100%? The 10k pot only metered 9.28k, but I don't think that contributes to the noise. Has anyone experienced this? Bad brick? crappy pots? I've tried new TL072, but I haven't tried a new delay chip.
Thanks.

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pt2399's are kinda hit or miss from what i've seen... I've seen threads of several builds that use that chip and after they swapped cleared things up for them...... Always buy chips in multiples for this exact reason...
 
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I would go ahead and solder the brick in. It likely isn't making contact enough. If you need to remove it use a quality solder braid, that usually cleans it up enough to take out

If you've populated the board and have the exact same issue as before then try another 2399
 
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