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Antenna Relay - Heathkit HX-11 Assembly And Operation Manual

Cw transmitter

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Page 25
[aos [recat
creas |
meter
meter
meter
meter
meter
15 meters
10 meters
Pin spacing .486"
Pin size .093 dia.
NOVICE
operation imposes restrictions on op-
erating frequencies as follows:
Crystal frequency limits for Novice operation:
[eee [ reemy
3700-3750 ke
7150-7200 ke
CAUTION:
Be
sure
to check the latest FCC
regulations
on frequency allocations and power
input requirements.
When ordering crystals be
sure
to stay well
within
amateur
band edge
limits to avoid violations,
Beware
of
so-called
bargain
crystals,
The
greatest cause of poor keying will lie in using
poor crystals or from dirty key contacts, Al-
ways
buy
crystals
from
reputable suppliers,
Furnish them with a schematic of the oscillator
circuit
to be sure of getting proper
crystals,
VFO
An external variable frequency oscillator may
be used, providing that a separate power supply
is employed for it,
When using a VFO, a jumper wire must be con-
nected across the RF choke in the cathode cir-
cuit of the 6CL6 oscillator stage, To key the
VFO
with
the transmitter,
the cathode of the
VFO tube should be connected to key jack lug 3,
and the chassis of the VFO must be grounded
to the Transmitter
chassis,
A plug to connect
the VFO
to the crystal socket of the Trans-
mitter can be made from an old crystal holder
or a twin lead connector.
Note: The grounded
side
of the
crystal
socket,
which is the left
side, should be connected to the ground side of
the VFO coax cable,
ANTENNA RELAY
The AC outlet on the rear of the Transmitter
provides
117 volts
AC to operate an antenna
relay. This outlet is connected into the Trans-
mitter
circuit
as
shown
on
the
Schematic
Diagram.
Do
not connect
a DC
relay, or an
AC relay intended for operation on other than
117 volts, to this socket,
CW
OPERATION
1,
Set the front panel controls
as follows:
ON-OFF switch to OFF.
TRANSMIT-STANDBY switch toSTANDBY.
LOADING to 0.
OPERATE-TUNE
switch to TUNE,
BAND SWITCH to desired band.
Meter switch to GRID.
AMPLIFIER to approximately 5.
2.
Insert
your
key plug into the front panel
KEY jack, with key contacts open.
3.
Connect the 117 V AC antenna relay solenoid
terminals to the ANT RELAY socket on the
rear apron (if used),
4,
Connect your antenna to the RF OUTPUT
coaxial
jack on
the
rear
apron, or to a
coaxial antenna relay if used (in this case
it will be necessary
to supply
an addi-
tional
connection
from
the
relay to the
transmitter),
5.
Connect the ground connection to the GND
lug on the rear apron.
6.
Plug the line cord into a 117 V AC 50/60
cps outlet,
7.
Plug the appropriate crystal intothe crystal
socket. WARNING: Never attempt
to operate
this transmitter without a crystal or VFO
input since damage to the final amplifier
can result,

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