Atelier Robin F100 series consists of the F125, F165, F170, and
F175. The first three look the same and have identical features,
except for the number of output channels. These quiet, compact,
well- designed machines
run standalone or from the versatile software that allows you to
control every aspect of the output.
three machines produce only square waves, but since those are
the ones most often used in rifing, the lack of sine or other
waveforms shouldn't be an issue. The F175 is a smaller, newer,
more expensive model that outputs any desired waveform. This
discussion is about the first three, particularly the F165,
which is a popular compromise between the simplicity of the F125
and the extra expense of the F170.
number of outputs available in each machine is as follows:
"2 internal channels that can run frequencies from 0 Hz
to: A: 1.5 MHz, B: 100 KHz"
"3 internal channels that can run frequencies from 0 Hz
to: A: 3.9 MHz, B: 3.9 MHz, C: 50 MHz"
"6 internal channels that can run frequencies from 0 Hz
to: A: 3.9 MHz, B: 3.9 MHz, C: 50 MHz, D: 50 MHz, E: 50MHz,
F: 3.9 MHz"
this machine works so well, and my interest is in disclosing shortcomings users may not be
aware of until it's too late, I don't have a lot to say about
it. It does what it's supposed to do —
and more — unobtrusively and with no aggravation.
those desiring more power, it's not clear this is necessary; resonance is the
important factor, not power. However, a "10-watt amp" available from Pacific
Health Products and sold for use with the F100 series is only an audio transformer,
not a true 10-watt amp. It steps up the voltage, which decreases the current and
therefore the power, or wattage.)
minor point is that the Atelier Robin website and documentation
don't mention a warranty. According to an email from the
manufacturer, it's one year parts and labor.
software, while requiring a short learning curve if you wish to
write programs, is extremely versatile, using English-based
commands and allowing you to specify settings for every
frequency or group. You can write the programs in the software
window or in Notepad; it's easy to paste in,
rearrange, or manipulate lists of frequencies or remove them to
sort in Word or Excel. The software
is available on the Atelier Robin site (a Mac version is also available), along with documentation.
program for XDR-TB by Jeff Sutherland, released on a
Creative Commons license
software has the features often used in rifing, such as sweep,
converge, fuzz (a type of sweep), pulse (gating), and duty
cycle. It also has positive offset (the default) and the ability
to create repeat loops.
noteworthy feature not available elsewhere, to my knowledge, is variable
background frequency (vbackfreq), which produces outputs on the
secondary channels based
on whatever frequency is running on the main channel —
a percentage and/or a fixed number of hertz. (It can also remain
Sutherland uses this in all his programs. In the sample
F165 program in the screenshot above, the main frequencies have
been assigned to channel c, since this has the highest frequency
range (50 MHz, compared to 3.9 MHz for the other two). The
variable backfrequencies have been assigned to the other two
channels (a and b, lines 5 and 6). These output a percentage of
the current main frequency based on what Sutherland calls scalar
octaves, which he has found more effective than harmonic
octaves (factors of 2). Scalar octaves are a natural logarithmic
function of the main frequency: exp(3), or 0.049787068,
and exp(6), or 0.002478752. The zero following these
on each line indicates that no fixed constant is added
after computation of the percentage. The 66.6 after the zero is
the duty cycle, obtained by dowsing.
variable functions are available for overall duty cycle and
there are any drawbacks to this generator, I have yet to find
them. The software is the key to its versatility — it's
intelligently designed, completely configurable, and the machine
implements the program reliably. You can set it and forget it.
The price is very reasonable. It may not be as flashy as
other machines, but if you're looking for utility and value,
this is the one to get.