Input Sensitivity / Jumpers
The latest version of the Cali76 features a set of jumpers that
give the user control over the sensitivity of the unit.
Should you prefer to have the input/gain control set very low,
it could be worth experimenting with the jumper arrangement
shown in figure 4. This will almost certainly help users to
obtain more rotational resolution in a pro-audio set-up, where
signals are relatively large.
Moving the jumper progressively right will result in more
input attenuation and less sensitivity.
Battery & External Power
The internal 9V battery will provide good-quality operation for
approximately 50 hours. After this time the user may choose
to fit a fresh battery. This can be done easily by removing the
four screws from the base of the enclosure. From here the new
battery just clips into place. Be careful not to knock any of the
components on the circuit-board.
Alternatively, an external supply can be used. A high quality
regulated supply should be chosen to avoid damage from
voltage-surges and other over-voltage conditions. The
connector should be the 2.1mm type with the centre-pin
"Wired-Negative".
For best performance, the pedal should be powered from an
18V supply. This will increase the headroom, allowing cleaner
processing of conventional guitar signals. This will also permit
the use of hotter source signals, such as active guitar pickups.
It's unnecessary to remove the battery when using an external
supply. There is no risk of damage to either the battery,
supply or pedal. However, as is the case with all battery
powered goods, old batteries are prone to leaking and so
should not be left installed for prolonged periods of time.
About the Designer
"Origin" products are currently being developed by Simon
Keats, of UK-company, Keats Audio. Simon has worked for a
number of big-name "audio" companies, on a full-time basis
and as a design consultant.
Simon can be reached by email, telephone or by post, and will
be happy to help with any enquiries.
Email: simon@origineffects.com
Telephone: 0800 810 1070
International: +44 800 810 1070
Address: Simon Keats
Origin Effects
First Floor Office
Unit C6 Station Yard
Thame
Oxfordshire
OX9 3UH, UK
Simon Keats/Origin Effects is not affiliated with Urei or Universal
Audio in any way. This product draws inspiration from the Urei "1176"
compressor, but does not feature any "like-for-like" circuitry!!!
Figure 5: Useful Settings: (a) vocals - subtle compression; (b)
vocals - limiting; (c) acoustic guitar / piano; (d) bass; (e) drums
- subtle compression (famous Dr.Pepper Setting); (f) drums -
"pumping" hard compression.
Note: All source signals normalised to -10dBV.
Figure 4: Input sensitivity jumpers on Cali76TX.
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