The amp PCB at the below location is not the "CHA 47". I mistakenly used that term instead of the correct description, "Apheared 47". The design is built according to Apheared's "47" design and Cmoy's power supply. There is no connection to C.E. Hansen's professionally produced boards other than the use of Apheared's circuit design. My apologies to all concerned!
To anyone who downloaded a copy of the Apheared 47 pcb from my ftp site between 5/7/02 and early 5/8/02 EDT :
I put up copies with a small disconnect between a 4.7k resistor and ground. You can fix it easily by just soldering over the small break, but I suggest that you download the new, corrected images that were put up around 11 am on 5/8/02 EDT.
My apologies for the oversight...I was really tired....