Channelman Posted September 19, 2006 Report Share Posted September 19, 2006 I've never been happy with the 'Top Cut' type tone control on most of the guitars I've owned. I would like to suggest this circuit attached here. This circuit acts, when the tone pot is turned down, exactly like the 'normal' tone control but at the other end provides the 'treble bleed', which gives a 'treble boost 'effect. Full adjustable to get the sound you want. So, you get treble cut and boost for the cost of one extra capacitor. Regards Channelman Quote Link to comment Share on other sites More sharing options...
Prostheta Posted September 19, 2006 Report Share Posted September 19, 2006 Question - how can a passive circuit provide treble boost when it can only attenuate? Quote Link to comment Share on other sites More sharing options...
Primal Posted September 20, 2006 Report Share Posted September 20, 2006 Yea, with passive circuits you can only cut frequencies. Quote Link to comment Share on other sites More sharing options...
Channelman Posted September 20, 2006 Author Report Share Posted September 20, 2006 Yea, with passive circuits you can only cut frequencies. Yep, you are correct BUT If ALL frequencies are CUT (action of Volume Control) BUT the high frequencies are not cut by as much (action of the Treble Bleed Cap) then in relation to the lower frequencies the treble frequencies will be at a higher level (or boosted). Passive tone controls which 'boost' and 'cut' both treble and bass have been in existence for years.....it's all relative Channelman Quote Link to comment Share on other sites More sharing options...
lovekraft Posted September 20, 2006 Report Share Posted September 20, 2006 As drawn, you don't get any "treble boost" unless the volume is turned down - with the volume pot wide open, the 1nF cap is effectively shorted out. Quote Link to comment Share on other sites More sharing options...
Channelman Posted September 20, 2006 Author Report Share Posted September 20, 2006 As drawn, you don't get any "treble boost" unless the volume is turned down - with the volume pot wide open, the 1nF cap is effectively shorted out. Correct.....but I don't run my setup with the guitar volume on full...so it works for me. It never sounds 'right' to me on full....just personal preference I suppose. If you do...then...it don't work. Channelman Quote Link to comment Share on other sites More sharing options...
Primal Posted September 21, 2006 Report Share Posted September 21, 2006 When you are boosting the treble in this way, you are only cutting the bass. It is all relative, but strictly speaking, you can't "boost" anything with a passive setup (as boost indicates amplification). Quote Link to comment Share on other sites More sharing options...
Doeringer Posted September 21, 2006 Report Share Posted September 21, 2006 Wouldn't this be easier with a no-load type pot? This would take the Cap out of the circuit and open up the treble a bit. Quote Link to comment Share on other sites More sharing options...
Channelman Posted September 24, 2006 Author Report Share Posted September 24, 2006 Just for Primal and Prosthata I did some simulations to show that you CAN get boost using passive circuits . The attatched circuit and sim is for a typical pickup, and average cable and a typical amplifier input. Anything above 0dB IS A BOOST. Channelman Quote Link to comment Share on other sites More sharing options...
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