Hi cbg-ers. I am looking at making the Don Tillman preamp circuit available as a printed board for those who don't have experience in soldering up circuits. I've found the Tillman circuit to be very good for piezos and adding a preamp to your gat will make it the right impedance for amps and mixing boards while greatly improving the tone and output level. It also means you can add a proper tone control using a 25k pot and the usual cap. The board I have printed includes extra cap and resistor for greater FET tolerances, a tone/boost option, and a volume adjustment for matching a piezo with a mag pickup or bringing the output down (the Tillman gives plenty of level from a disc piezo and can be a little hot for some inputs).
The clearly labelled board alone would be $10 and the parts are easy to get. Board plus parts ready to solder in would be $20. Fully assembled - just needs the piezo, battery and outputs soldered on - would be $30. (Piezo, 25k pots, output jack, battery and battery holder not included).
Would come with set of instructions.
Any interest out there? I'd need to see a bit of demand to justify getting a sheet of them printed up.
cheers and Happy New Year
Glenn
Replies
OK, thanks for your interest. I've checked out the costs and the only way I can justify the time and outlay would be to sell fully assembled units at $25. You'd have to solder on a piezo, battery and output jack (not included) and if necessary make a battery holder and access panel. All very easy. So still interested?