31 Dec
2018
31 Dec
'18
3:46 p.m.
Le Sun, 30 Dec 2018 19:24:37 +0100,
Ralf Mardorf <ralf.mardorf(a)alice-dsl.net> a écrit :
On Sun, 30 Dec 2018 19:00:04 +0100, Dominique Michel
wrote:
Only the Clapp and the Franklin will allow you to get a working
LC oscillator with parts of that oscillator at both sides of a coaxial
cable, with that cable which doesn't influence too much the frequency. I
try with 1.5m and 4.5m cables and was able to make a good setup in 2
minutes in both cases, that without metering, only using my ear.
For the theremin, some provide MIDI Out and some
Moog models have CV
out connectors for the volume and the pitch. This CV out solution
seam to be the best one when used with the thereminator:
https://www.wavelicker.com/en/thereminator/
Unfortunately there seems to be no English information about the A-178
Theremin Control Voltage Source on the Doepfer website. But the German
page provides some nice pictures (and dead links). There's a note in
English: "It's not possible to connect the antenna via an additional
cable to the antenna socket. Antenna and hand form a variable
capacitor with a very small capacity in the pico Farad range. The
electronics of the module is puzzled out just for this capacity
range. If a cable is added the capacity range changes totally and the
module will no longer work ! But it's possible to mount the complete
module with antenna at the desired position, e.g. into a small case
that holds one or two of the modules. For this a longer bus cable is
required."
http://www.doepfer.de/a178.htm
To add a CV out for the volume into the Black Star may be relatively
easy, the main issue being the lack of common standard between
manufacturers. For the pitch, I will have first to investigate what
are the existing hardware solutions to make a reliable frequency/voltage
conversion into the audio range. Another issue is that I have no
hardware to test it, I jumped directly to MIDI instruments in the
eighties.
Ciao,
Dominique
--
If you have a problem and you are not doing anything to fix it, you are
at the heart of the problem.