Wondering if some veterans with knowledge of the PhD phono could share some advice. I know this is an older unit. My PhD has the four position gain boards for 62, 64, 66, and 68db. I would like to run at around 40 - 45 db of gain. I have the two extra gain PCB's and many resistors, but I do not know which resistors to use in the gain PCB's to get it to 40 - 45db. Any ideas? Thanks in advance.
markd51, That is a good idea. I did see some images of the upgrade PhD internal board, the one that uses AC power. On that board, the resistor values for all the gain and load options are listed right on the board. I will save that image for future testing with different r values.