Rotary selector for tremolo on a Deluxe Reverb

knuckleberryfinn

I'm building a Deluxe Reverb clone and want to use a rotary selector instead of a 3 meg reverse audio pot (which I can't find anywhere).  I've got a six position switch, and am wondering which value resistors to use.  If my thinking is right, the values should go up rapidly (proportionally speaking) and then tail off.  So would, say, 100K, 1M, 1.8M, 2.3M, 2.6M, 3M be about right?

Also, I'd quite like to turn the effect off with the same switch.  Would connecting the first lug straight to ground do this?  Or should I break the circuit where the footswitch normally goes?  (I hate footswitches)

normula1

TAD have these:

http://www.tubeampdoctor.com/en/shop_Potentiometer_Pots_with_solder_lugs/3M_reversed_log_pot_CTS_USA_32

knuckleberryfinn

Good find @normula1.  I need tolex anyway, so I'll add one to the order.  Thanks!

ICBM

If you still want to do it with a switch, the 'off' position would simply be with no resistor selected, not with it grounded.

I'm not sure about the individual resistor values, but you might be better to test it with a trimmer and then measure the values you get, so you can select exactly the speeds you want.