gareth magennis wrote:
FWIW, Reverse Log pots are now commonly available, they didn't used to be.
http://www.ebay.co.uk/itm/Reverse-Au... 6uMPFGoCyCZ-A
** Nothing stops you using a regular log pot operating in the reverse sense, with gain increasing in the CCW direction.
A very satisfactory solution is to use a 12 position rotary switch and a chain of 11 resistors wired across adjacent contacts.
For 4 dB steps, the values a
15, 27, 39, 68, 100, 180, 270, 470, 1k, 1.5k & 3.9k
...... Phil