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CRYSTAL INSTALLATION
DISCONNECT POWER BEFORE REMOVING CABINET
LEAVE POWER OFF WHILE INSTALLING CRYSTALS
To remove the catinet, first remove the screw at the
bottom rear edge. Push the rear panel forward through the
cabinet.
The components and crystal sockets are in full
view and easily accessible.
Ihe three crystal $n sockets at the front are for channel
No. l.
The second row of 3 ie for channel 2 etc. Each
crystal will be inetdled betrpen the centcr row and sre
outside row.
Ihe outdde rows connect to the r-f module
nearest them on the oppodte dde of the boerd.
only
one outside row will bc-used wheNr only one r-f module is
used. A total of eight crystals may be used. They may
be inetalled in ary order and in either burd as long as each
crystal frequency is proper for the particular module to
which it is connected.
L, H or U modules may be in either position.
Figure I
Remove the crystal by a gentle pull upward.
Insert
the crystal by aligning the pins with the sockets and pushing
straight down. DO NOT BEND THE SOCKETS. THESE
MINIATURE SOCKETS ARE MADE OF SPRING BRONZE
AND WILL BREAK OFF IF BENT EXCESSIVELY.
NOTE:
Do not install two crystals of the same frequency.
Rigid quality standards are applied to crystals furnished
by Electra Company to assure full performance, therefore
our warranty does not include correcting poor operation
caused by crystals from other sources.
Unless ordered otherwise the "U" alignment spread is
450mHz to 470mHz, the 6'H)' 150mHz to l7$mHz, and
the "L" 33mHz to 4BmHz. New frequencies may be added
within these spreads.
CRYSTAL FORMULAS
'6H"
Received frequency - 10.80 mHz = crystal frequency.
3
Example: 155.01 mHz - 10.80 mHz = 48.07000 mHz
"L))
Received frequency * fdgO -H,
= crystal frequency.
Example: 35.80 mHz + f0.80 mHz = 46.60000 mHz
6'L:'
Reecived
frequ€ncv - 10.80 mHz = crystd frequency.
Example:
9
453.250 mllz - 10.80 mHz = 49.16111 mHz
9
USER HINTS
Radio equipment usually operates in an environment of
man-made electro-magnetic noise which radiates from power
lines, fluorescent lights, motors, appliances, ignition systems,
etc. Modern. radios are designed to minimize interference from
such sources but operation may be affected under conditions
of unusuallv strong noise.
Dstant weah
"rhp''
or noise siErals may be received by
this receiver because of its high sensitiuity.
Whenever such
conditions intemrpt scanning or whenever a very busy channel
prevents reception of other desired signals, the affected
channel ma,v be bypassed by means of its individual panel
switch.
The squelch control functions in the normal manner and,
in addition, as it is rotated counterclockwise farther, it be-
comes a sensitivity control.
By careful setting, it can accept
weak signals or can be adjusted to receive only medium or
strong signals.
Interference from weak signals on the same
channel may be reduced in this manner.
In cases of strong interfering noise or signals it may be
desirable to reduce the length of the antenna to reduce noise
pickup below a critical lerel.
This mar tr ven- effective in
medium and strong riprl
ane:rs.
Single-channel operation may be obtained as described
under Operating Instructions.
It may also be accomplished
with the
"MANUAL-SCAN"
switch in either position by lock-
ing out all but the desired channel. This assures that the radio
will always be on that channel even when turned OFF and ON.
Continuous-carrier signals such as the ESSA weather broad-
casts on 162.55mH2, which are available in many areas, may
be received when desired by use of the individual channel
switches.
ln mobile service the commonly encountered poor recep-
tion
conditions
are signal fading, nearby faulty
ignition
systems, power lines and proximity to shong signals. Careful
setting of the squelch control will minimize these conditions.
When moving or shipping the radio, remove the telescoping
antenna to avoid damage to it or to the internal circuit assem-
blies.
R A D I O S E R V I C E S
Local Govemment
Special Emergency
Highway Maintenance
-Hospitals
Foresty-Consenation
-Ambulances
Motion Pictures
-Physicians
Special Industrial
-Disaster Relief
TelephoneMaintenance -SchoolBusses
Automobile Emergency
Power
Public Mobile Radio
Petroleum
Mobile Telephones
Forest Products
Police
Fire
Press
Business
Railroad
Taxicab
Marine
Manufachrrcrs
Motor Carrier
Rurd Radio
C R Y S T A L S
t l l
T O D U L E
I
I R F l o D u L E ' B '
l ( o n e o r r o r
t r D E
cn vsrrue
I
\ r o D u L E I
n F t o o u L E
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