Vern VanZ <n7gtb@...>
btw, I see this same response curve regardless if I use my homebrewed CTF, or the N5IB version (i.e., PCB with amp).
I've also noticed, that the high frequency side of the curve is less distorted with the crystals having a 3db bw > 100hz. As the 3db bw approaches 80hz, things get considerably 'bumpier'...
I'd like to determine if this is my test setup, or simply bad crystals. Any help would be greatly appreciated.