my CS-3 Compression Sustainer pedal work perfecly with a 9V battery. but doesn't with 9V adaptor, the led only cames on half way, and the pedal doesn't work properly. everything seems to work fine with 16V adaptor. is this a normal issue? btw, I bought my CS-3 back in the 80s.
check out the other great pedal and boss info that bossarea has put together
regards dr. bob
===excerpt==== Powering ACA pedals with a PSA power supply Powering the older pedals designed for 12V DC input with either a newer ACA or PSA adapter will not work very well. The voltage drop over the resistor and diode will prevent the pedal from getting enough power and its LED will usually only glow faintly. The solution is to use a daisy chain and plug in another pedal designed for the newer ACA or PSA adapter. The lead between the two pedals will short the resistor diode pair and the pedal will receive full power.
Depending on the mains voltage there are 4 were versions of the ACA adapter. ACA-100, ACA-120, ACA-220 and ACA-240. The number denotes the mains voltage that the adpapter should be plugged into. The 9V version of the ACA adapter has a G appended at the end of its name. Pictured is the ACA-120G which is the version sold in the USA. Thanks to Stinkfoot for most of the information above.