Eddystone 990R - Installation; Accessories

Panel.
The
front
panel
is a
light-weight aluminium casting and contributes groat
mechanical
strength to
the
receiver
as a
whole.
Chromium-plated handles are
fitted for
con-
venience
in
handling
the
receiver
and
these
also
allow
it
to be placed
"face-down”
without damage
to
the
panel
controls
when removing the cabinet.
Cabinet
.
This
is
fabricated
from
light-gauge
sheet
steel
and affords adequate
protection for
the receiver
regardless
of
the manner
in which it
is
mounted.
Fixing
points are pro-
vided
in
the form
of
hank bushes
for
attachment
of
rack-mounting brackets,
rubber
feet
and
shock-absorbent
mountings.
Dial and
Drive
Assembly .
The
tuning
control
drives a
spring-loaded
split-gear system
having
a
reduction ratio
of
approximately
100 s 1 .
The
drive
is
flywheel-loaded,
substantially free from
backlash
and
ensures
a
consistently
high
degree
of
re-
setting
accuracy
when use
is made
of
the
logging
scales
provided.
Tuning scales are over
nine-inches long and are
calibrated
directly
in
frequency.
A cursor
adjuster
allows
correction for scale errors.
External
Wiring
.
All
external
wiring
(with
the exception of
the
telephone output)
is taken to
ter-
minals
and
sockets
at
the rear
of
the set.
The telephone
output
is
brought out
on
the
front
panel
and
accepts a
standard
Post
Office jack plug.
INSTALLATION
GENMAL
Accessories
.
All
receivers
are
supplied
complete
with five standard
BNC coaxial
connectors,
a
12V
DC
supply
connector
(ready-
wired
with shorting
strap
as
per PL8
on
circuit
diagram)
and
a mains
connector
with
six-feet
of
three-core
PVC
lead. Spare
fuses
(lA
and 500mA)
are
retained in
clips
on
the
right-hand
side-plate.
The
following
accessories
and
associated equipment are available
for
use with the
990R
receiver
s-
1.
Rack-mounting
conversion
kit.
(Comprises
two rack-mounting
brackets
t
7093?
and
four 2BA
x
§"
fixing
screws
s
40A
-
246)
2.
Set
of
four
rubber
mounting
feet
s
71J2P.
(For use when converting
Model 990R/RM to
bench-mounting)
3.
Shock-absorbent
mounting
s LP2817«
(Complete
assembly
for
attachment to
either
version
of the
receiver)
4.
Cabinet
loudspeaker
s Cat.
No.
935*
5.
Plinth
loudspeaker
unit
s
Cat. No.
906.
6.
IF
Converter
Type
959
(959/l
for
rack
installation),
7*
Panoramic
Display
Unit Model
EP17R
(EPI7R/RM for rack
installation).
8.
Low-impedance
telephones
%
Cat.
No.
LP2924*
Orders
and
enquiries
relating
to
accessories
for the
990R
receiver
should
be
sent
to
the
"Sales
&
Service
Dept,"
at our
usual
address.
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