Hi Dan! Glad to see you back.
I've been following YHR audio exciters thread closely since I don't know yet if I should use one of them or a regular speaker for my panzer IV....
As for the acoustic smoker, my last design revolves around a 1 inch 3 Watts Aura speaker for pumping the smoke; and a 5.49 OHMS 1 Watts wire wound resistor, driven by a step down adjustable voltage regulator; to generate the smoke....
I haven't given up on the smoking gun idea; I just felt asleep on it

...
The wake-up call came last week from Don (Torpedochief) When He posted this thread:
http://www.rcuniverse.com/forum/rc-t...nventions.html
Don is the one who planted that crazy idea in my head back in 2011...
I can tell you that I have some 32 gauge Kanthal wire and 2 mm silica wick coming in the mail...( Something to do with filling up a smoke chamber within 3 sec.)