LPB
Manufacturers
and
Distributors
of
Broadcast
Equipment
Pl
•
8
Signature
Il
Consoles
utilize
these
classic human engineered control
knobs which readily
conform
to
the
grasp. Position markings
allow
immediate recognition
of
level set-
tings at a glance
from
any direction.
Panel markings are black epoxy silk
screened over the .
125
inch
thick
deep grained and brushed aluminum
front
panel, and overcoated
with
clear epoxy
for
additional per-
manence
of
markings.
Al I program buss switches are rugged tele-
phone-type roller
cam
design
with
gold
alloy contacts.
Additional
closure contacts
are provided
for
internal relay
muting
or
are
wired
to
terminal strips
for
external
control
of
cartridge machines, turntables,
etc.
A unique feature
of
the Signature
TI
Stereo Con-
soles
is
the mono/stereo input switch located
behind the
front
panel, which enables a
mono
source
to
be
split
to
the
left
and right program
busses
. These selectors
are
provided
for
each
microphone-capable channel and one high level channel.
The
Card
Edge Connectors
are
molded
of
high stab
ii
ity
diallyl phthalate
and
the contacts are phosphor bronze,
with
gold over copper plating. The contacts are
of
the
"tuning-fork"
variety with
controlled
lateral
float,
main-
taining posit
iv
e
continuity
of
contacts
and
provides suffi-
cient elastic reserve
to
prevent the contacts
from
becoming
"set."
All
I.C.
sockets feature gas-tight connection contact
geometry
with
tin-alloy
plated copper contacts. The min-
iature toggle switches
used
for
microphone
input
gain
selection, stereo/mono
input
switching and
mono
mixdown
are
Mil-Spec types
with
sol
id
coin
si
lver contacts and
terminals which feature a
minimum
of
200,000 cycles
of
operation. (S-20
input
circuit
assembly shown)
The rotary step attenuators are
2dB
per step,
20
steps,
with
appropriate tapers at either end
of
the
control
range. The
contacts are solid silver alloy and a laminated
rotor
is
used
to
produce
an
exceptiona
lly
low
noise figure
of
-125
dBm.
A stainless
steel
shaft
with
free-turning sleeve-type bearings
provides constant knob tension.
Signature IT 8
and
10
mixer
consol
es
feature 3 position
input selector switches giving 24 and 30
input
source
capability.
An
exclusive manu-
facturing technique called
"wedgelock"
contact fastening
secures the stationary contact
to
prevent loosening
and
rotation
of
contacts. Spring tempered
si
lver alloy contacts
and
coin
silver
rotor
blades have a
mini-
mum
lifetime
of
250,000
cycles
of
operation. t,
8
C
•
A
B
~
The plug-in microphone preamp incorporates switch
selectable preamp gain
to
allow
instant level matching
to
--45,
-55
and
-65
dB
microphone sensitivity levels. All
microphone inputs are coupl
ed
with
a dual shielded, high
RF suppression transformer. AlI acti
ve
circuitry
is
located
on plug-
in
modules
for
flexibility
and
ease
of
ma
intenance.
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