Quote from: madbean on August 25, 2010, 08:50:01 AM
The Boost is a feature brought over from the original Blackstone circuit. In fact, the Blackstone has TWO internal trimpots for boost! One is a straight boost (more gain) and the other is frequency dependent. For the Mysterioso, I reduced this to one trimpot which has a switch that can be used for full frequency or frequency specific boost. You do not have to have either installed, if you don't want to. Simply leave off the switch, C6 and jumper pads 3&2 of the boost trimpot.
If you don't want to have the 'buffer/reactive" feature, I suggest leaving off the "buffer" part. This means you can leave out C1, R2, Q1, R3 and C4. Also, you will need to jumper pads 1&2 of the "B/R" switch.
Thanks for the replies, Boom and Brian; much obliged. I was planning on wiring the boost to an external pot as shown in the PDF layout; presumably I could then leave off the trimpot, no? I'll be keeping the switch for fullfrequency/mid selection on the boost to see which I like better as time goes on.
![Grin ;D](https://www.madbeanpedals.com/forum/Smileys/default/grin.gif)
Looks like removing the volume pot from the circuit is just a matter of jumpering the relevant pads, ya?
That's exactly what I needed to know about the B/R switch and related components, thanks!