Wiardgroup

One jumper is for the 24 dB output and the other for the 12 dB output. Move both to top 
position if your mixing with the Blacet Mixer Processor. Leave both at bottom position if 
you are mixing with the Blacet Quad VCA.

Current draw of the modules varies. Joysticks draw about 25 ma. Everything else is less 
than 100 ma. per module. Negative supply loading is always less than positive supply 
loading.

Please note that one Time Machine module can draw 250 ma. VCOs should be on a 
different supply.

--- In wiardgroup@yahoogroups.com, "mrboningen" <darkflametwentythree@h...> wrote:
> hey grant,
> 
> thanks for the extremely informative answer! i've saved it in a text
> file with all the other boogie info i could find from this list. 
> 
> how about the jumper switches? do they both need to be moved up in
> order to maintain the same polarity between all the filter modes? and
> the current draw of all the 1200 series modules?
> 
> will give it a whirl as a low pass gate later!
> 
> thanks again for the info,
> 
> gregg.
> 
> --- In wiardgroup@yahoogroups.com, "grantrichter2001" <grichter@a...>
> wrote:
> > It's a mode unique to photo-electric filters. Any other
> transconductor (transistor, diode, 
> > OTA) can not run to zero control current without making bad things
> happen to the DC bias 
> > and producing 15 volt thumps.
> > 
> > But photo-electric filters go completely off (0 Hz). This allows you
> to use the filter as a 
> > combined VCF and VCA.
> > 
> > In the West Coast model, the complex timbres are generated before
> the filter via complex 
> > oscillators, non-linear waveshapers, FM or additive synthesis. The
> "gate" is then used for 
> > final amplitude and spectral shaping.
> > 
> > The Boogie supports both modes, either straight subtractive with a
> following VCA, like the 
> > East Coast instruments, or gating and spectral shaping without a
> following VCA, like the 
> > West Coast instruments.
> > 
> > The main frequency control covers 20 octaves, 0 to 20 Hz, which is
> 10 octaves, and 20 Hz 
> > to 20 kHz, which is another 10 octaves.
> > 
> > To "gate" with the Boogie, set initial frequency to zero and control
> range to max. 
> > Resonance is set to zero. A 10 volt signal into "Control In" will
> then sweep the filter from 0 
> > Hz to 20 kHz. The 6 dB output is approx. equivalent to the Buchla
> 292 "combo" mode, and 
> > the 12 dB output is approx. equivalent to the 292 "filter" mode. But
> the Hamamatsu opto-
> > couplers decay in 20 ms., rather than the 200 ms. decay of the
> VTL5C3/2 used in the 
> > Buchla 292C.