"Adjustment: set the 1k "Abuse" pot halfway. Play though it, and adjust 5k preset until "gating" just stops. That's it!
You'll find that it has plenty of output, that the "Abuse" control gives a good range of colour, the "Sparkle" control has a very wide range and the sound is remarkably reminiscent of early Jeff Beck (certainly not a bad thing!).
Possible mods:
Put small value capacitors from base to collector of the middle two transistors - start with 47pF. This "smooths out" the sound a lot, but reduces the treble available.
If you have radio interference, put 100pF from base of the first transistor to ground.
Experiment with the capacitor values in the tone control - the 8n2 could go as low as 3n3, which would give a ridiculous range of treble control!
Increase the value of the 47k feedback / bias resistor - try as high as 470k. The gain will rise, the touch sensitivity will disappear, and it will become a high gain screaming monster! "
Thanks for this. I have built several of the other SI tonebender / AKA hot silicon's but not this one.
ReplyDeleteDo the transistor and resistor on column 17 share a hole? Bodge
ReplyDeletethat shouldn't be like that. thanks for catching that error, i fixed the layout.
DeleteIt works. I've skipped the fat switch for now and I'm using 5n2222s and a 4.7nf instead of the 8.2nf. I've not had a major noodle but it has promise. The trimmer could come off board and if combined with a 10-22k starve pot open up some interesting noise options. When i have chance I might switch the 47k for a 470k pot and see what happens there. Thanks for the layouts
ReplyDelete2n2222s doh
DeleteFired up right away. Tonecontroll is working more like a midcontroll on my build, is that the way it should be? Also, in "thin mode" it is veeeeery thin, I upped the 10nf to a 15nf and that was better. Still I feel there should be more twang/edge as in the video.
ReplyDelete