Phil,

[PerryNH]

Phil,

I tried moving the TH frequency down to 600. The 15 VPP stayed the same but once I got below 1300, the waveform started real distorted:

here it is at 750 KHZ (ugh! looks like unwanted harmonics, big time) What is going on?:

http://i6.photobucket.com/albums/y235/perryW/ScopeTraceTalkingHouse9.jpg