Bluesbreaker build issue

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Eightsevenzero
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Joined: 27 Jun 2011, 15:03

Post by Eightsevenzero »

I just built up a BB-1 using the V1 layout found here:

https://3.bp.blogspot.com/-Bj8twAFTYCU/ ... reaker.png

Everything works, voltages to the chip pins are all correct, diodes are 4148's showing .63v forward voltage when tested in circuit. The only change I made to the schem was to sub a 330K for the 220K for a little more gain. While everything technically works, I'm getting what I can only describe as too much clean signal on top of the distorted signal. The clipped signal is definitely there, but it just has a bit of this clean signal type thing going on, almost as if the clipping diodes arent clipping enough or something. Hopefully that makes sense; I have checked the circuit multiple times for errors but I'm not coming up with anything at all.

Thanks!

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mauman
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Post by mauman »

This circuit doesn't have a ton of gain, that's why the King of Tone used 2 of them stacked in series. You can add some gain by adding a 50k or 100k resistor between lug 1 of the Gain pot, and the wire that connects to the vero hole A3 (which leads to the 47pF and 3k3 resistor).

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