[stv]

So... I asked this guy for some details and here was the latest
response:

" The pre-amp for electricity harvest is essentially the same design
as those used for audio applications. Understanding this may be of
interest for anyone desiring to modify or make a pre=amp for phase
canceled signaling.

"An electromagnetic or piezo-electric signal is first poled, then
oriented through a diode (one way current) and buffered to match ohm
ratings (think high or low Z) with a rheostat. This is a feature
sorely lacking in most systems. Martin Taylor uses this when blending
any of three pickup/mic signal combinations on his guitar.

"Anyway, if you're still with me, the "phase canceling" occurs when
signals which have carefully matched ohm ratings are aligned, in
phase. Just like the familiar problem of a mic hearing itself from the
speaker and feed-back, except in this example the identical
characteristics of the two or more perfectly matched signals create a
"standing wave" and disappear. A unit like a digital feedback
eliminator works constantly calculating a root/mean/square (RMS)
equation throughout the harmonic range while summing signals,
canceling as it works. Then of course amplification and/or power
inversion. A phase inverter switch on your soundboard simply changes
the direction of signal travel along either two wires, the third being
a ground.

"I never thought you were slow to understand before. Usually quick
with valuable experience to share. Thanks for that.
here's a pick of my pre=amp. The "inserts" are TRS. So, channel out
jack each side to insert of the other, each direction. A single TRS
patch cord would likely work even better, But I don't have one yet.
The Pendulum SPS-1 has exactly matched ohm signals... "

And he posted a picture of the back of a Pendulum SPS-1.

I don't get it. One more time, please? Is there -anything- to this
(harvesting excepted, never mind that...) ?

Thank you,

stv