Hi guys I've built the Phase 90 from Tonepad ( http://www.tonepad.com/getFile.asp?id=42 (http://www.tonepad.com/getFile.asp?id=42) ).
I got it up and running but my problem is this: when I turn the rate pot all the way CCW it sounds like a tremolo more than a phaser (it really sort of beats) and if I turn it all the way up it goes from beating to constant.
I used this pot: http://se.mouser.com/Search/ProductDetail.aspx?R=RV16AF-10-15R1-B55_-ODvirtualkey14860000virtualkey313-3000F-500K (http://se.mouser.com/Search/ProductDetail.aspx?R=RV16AF-10-15R1-B55_-ODvirtualkey14860000virtualkey313-3000F-500K) could that be the problem (using linear taper instead of reversed logarithmic?)
I can adjust the trim pot and find a sweet spot for the sound so I guess the circuit itself is working?
It will likely work better with the reverse log pot! Providing everything else is wire up correctly, that is ;o)