Thanks. Good thoughts and tips. I can't imagine that a clip-on would work well, but since I have one, I'll try it!
The USB->phono adapters I ordered are apparently coming from somewhere in China. They should be here next week.
I kind of wonder if after all of this I could as easily have used my Panasonic digital meeting recorder (with the good mic). I guess I'll experiment with that as well. That provides a VERY portable (1"x4" clip-on-or-in-pocket) digital recorder.
Gary Merrill
Wessex EEb Bass tuba (DW 3XL or 2XL)
Mack Brass Compensating Euph (DE N106, Euph J, J9 euph)
Amati Oval Euph (DE 104, Euph J, J6 euph)
1924 Buescher 3-valve Eb tuba (with std US receiver), Kelly 25
Schiller American Heritage 7B clone bass trombone (DE LB K/K10/112/14 Lexan, Brass Ark MV50R)
1947 Olds "Standard" trombone (Olds #3)