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LPB
Manufacturers
and
Di
stribu
tor
s
of
Broadcast
Equipment
Pl
•
8
Signature
II
Consoles
uti
li
ze
t
hese
cl
assic
human engineered control
knobs which readily
conform
to
the
grasp. Position markings
al
l
ow
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 tel
e-
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
co
ntrol
of
cartridge machines, turntables,
etc.
A unique feature
of
the SignatureII 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 positive
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
solid coin silver 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
exceptional
ly
low
noise figure
of
-125
dBm.
A stainless steei shaft
with
free-turning sleeve-type bearings
provides constant knob tension.
Signature
II
8 and 10
mixer
consoles feature 3 position
input selector switches givi
ng
24 and 30
input
source
capability
.
An
exclusive manu-
facturing
technique
cal
l
ed
"wedgelock"
contact
fastening
secures the stationary
contact
to
prevent loosening and
rotation
of
contacts. Spring tempered
si
lver
alloy
contacts and coin 8
silver
rotor
blades have a mini- C
mum
lifetime
of
250,000
cycles if
of
operation.
A
The plug-in microphone preamp incorporates switch
selectable preamp gain
to
allow
instant level matching
to
--45,
-55
and
-65
dB
microphone
sensitivity l
eve
ls.
All
microphone
inputs are coupled
with
a dual shielded, high
RF suppression transformer. All active
circuitry
is
located
on plug-
in
modules
for
flexibility
and
ease
of
maintenance.
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