Vision of 2003 . . ."True beauty is hidden in Simplicity"
Rockmore is the #1 theremin virtuosa, but how did Lev Sergeyevich
create her "authentic" golden sound?
My 12 year theremin journey seems to be winding down. As
time passes I begin to forget details about my build.
People seem to gravitate more toward the digital build today
which seems to me to miss
what the theremin represents... that is a connection with the past.
The most important aspect for me is that authentic
sound... not a synth sound or nine octave whistle buried in reverb.
The Altermen Authentic.wav
This is theremin
direct to sound card, no acoustic development.
designed a single tube theremin like instrument that has
the Classic Sound, Drift Resistant and a Perfectly
Linear Pitch field that can be spread out to what is
comfortable for your playing. Volume Control is separate
so it can be placed anywhere around you. Pitch setup
with remote proximity Volume Control can be built for less
than $200. It uses three 8.2" x 3"
circuit boards that I furnish for the love of the Art.
Only the $6 tube and $2 tube socket are not purchased at
to Tube Warmth (Nature)
hybrid pitch side uses one of these osc boards along with the Phoenix
Pitch/Volume build to get the authentic sound.
My last project
was to breadboard a hybrid Tube/Valve pitch
oscillator and see if "Perfect Linearity" could be
found. This would clarify if the phenomenon of LINKS
and the Lev Antenna was unique
to transistor oscillators or could it also be demonstrated using a tube/valve
answer is Yes! "Perfect Linearity" happens with
of my theremin experiments over the years used Hartley Oscillators
operating between 800 kHz and 1000 kHz. This higher frequency
allows the design of the Lev Antenna to be more practical. I found that
using hand wound
air coils in the oscillators was a poor choice because it limited Perfect Linearity to just over three
linear octaves and added to pitch drift. Experimenting in real
time demonstrated that using High Q ferrite
coils would give more than five linear octaves, more
than using air core coil.
pitch oscillator around 922 kHz and the Lev Antenna creates
my musical crudeness in a 18" pitch
field in the sample below I will make a one octave
jump by closing my fingers then rapidly opening my fingers within 1" of the pitch antenna. I
will repeat this while moving midway back in the pitch field and then near the
lowest octave. Each time the same hand/finger movement is used. This is one of the easiest methods of validating
any theremins pitch field linearity. I am watching a
tube sine wave
A linear 2400 hz down to 100 hz
linearity remains no matter what size intervals or octave widths
you enjoy playing. This Lev Antenna phenomena once set does not need
retuning. It's tuning bandwidth is broad and stable.
scratch built hybrid theremin uses one vacuum tube for the
fixed oscillator. This hybrid theremin pitch
field has Perfect Pitch Linearity and cost less than
build. My design does not need variable capacitors or variable inductors.
It uses simple solid state tuning I designed, the
tuning knob can be twenty feet away.
you would enjoy building this harmonically rich theremin
voice with its perfectly linear pitch field, then I
have organized it as a "build it yourself"
project for about $200 usd
in parts. This cost includes dual tube/valve pitch
and a stand alone hand proximity RF volume control board with an adjustable 10" down
to 2" shading window. It begins by building the Phoenix
design then it evolves from there.
Most of the
parts you purchase from Mouser.
At no cost make your own
pc boards from my PDF's. In the future I will have
and drilled printed circuit boards, this will add to the
overall cost. Three pc boards @ 8.2" x
This Altermen could become
one of the most treasured designs,
13 common design myths.
tube/valve build begins with the Phoenix Solid State,
then one tube osc board.