Paul Burridge wrote in message . ..


Yes, but I'd hoped to avoid any intermediate amplification stages.
Looks like I'll have to swallow it.

Exactly how much power do you need? Exactly how "clean" (free from
other harmonics) must it be? Don't you have an amplifier in the
circuit you're playing with anyway? 100mW should be easy with a
single stage following the digital square wave, and a full watt is
certainly feasible with the right design. If you were hoping for
100mW of fifth harmonic from a single HC output, you were probably
dreaming.