| Why not go with a 32 position attenuator, then develop a log-taper control? You could then provide fine, 1 dB steps in the critical range and have large attenuation steps at the bottom of the range (gives the dimming Mr. Katz suggested).
I designed something for a phono preamp years ago that had this - I happened to use a Shallco switch (big! thing) and matched 1% resistances. Zero crosstalk, near-perfect attenuation tracking L to R. Mine was a pot, as opposed to a ladder since I had an amp stage behind it.
I still have the design notes buried somewhere if anyone is interested. Unfortunately, the design software was written on a now-obsolete and ancient HP lab computer...
ps - that is one very pretty unit! |