Page
250
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KEY CONNECTIONS
In the CW mode, a positive voltage is present at the
KEY
socket on the rear panel. If you use a key designed for grid
Mock keying, the usual keyer leads should be reversed so the
keyer output lead is connected to the shell of the phono
plug and the keyer common, or ground, lead
is
connected to
the pin of the phono plug. If your keyer uses a relay, the
lead connections are usually immaterial, although its
schematic diagram should be studied to
insure proper
connections.
LINEAR AMPLIFIER CONSIDERATIONS
Heath Amplifiers
Figure 2-3
shows
the installation of the Transceiver with a
Heath amplifier.
ALC Connections
If your amplifier has ALC (automatic level control) output
provisions, connect a cable between the ALC jack on the
Transceiver and the linear amplifier. The ALC bias voltage
from the amplifier helps prevent transmitter overloading and
"splatter." Although protective circuitry of this nature
is
a
valuable circuit element,
it
is not a substitute for proper
adjustment of the exciter and its drive level to theamplifier.
Antenna Relay Connections
Many amplifiers have an internal transmit-receive relay
which is
actuated when the relay coil circuit is grounded.
Heath amplifiers are of this type. This Transceiver has relay
contacts available to operate the transmit-receive relay. The
grounding connection may be made by a shielded cable (or
other 2-conductor wire) connected to the accessory socket.
pins
8
and
9.
Use pin
9
for the ground connection and pin
8
for the relay coil.
1.
REMOVE
1-118"
OF OUTER
INSULATION.
2.
REMOVE ALL BUT
114"
OF
THE BRAIDED SHIELD.
3.
UNBRAID THE
114"
OF
SHIELD AND TWIST THE
FINE SHIELD WIRES
10
FORM A STRANDED LEAD.
SHIELD
AUDIO SWITCH
5.
SLIP THE HOUSING AND SPRING ON THE CABLE.
6.
BEND THE BARE END OF THE GROUND LEAD AND THE
SHIELD BACK OVER THE SPRING AND SOLDER.
SOLDER SWITCH
(SHIELD) LEAD
7.
PUSH THE AUDIO LEAD THROUGH PIN
I
AND THE SWITCH
LEAD THROUGH PIN
2
OF
THE CONNECTOR BASE (NOTE
NUMBER INSIDE
OF
CONNECTOR BASEI.
8.
SOLDER BOTH PINS ON THE END, THEN CUT OFf THE
CUT
OFF
EXCESS
9.
SLIP THE HOUSING OVER THE CONNECTOR BASE AND
FASTEN
WlTH A SETSCREW. FASTEN THE SPRING
WlTH THE OTHER SETSCREW.
Fiwre
2-5
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