Heathkit HA-14 - CW Operation; In Case of Difficulty

SB- 400
TRANSMITTER
EXT. ANT. RELAY
| GND.
RCVR. RCVR HET. RCVR. LINEAR
AUDIO LMO OSC. MUTE RELAY
Oe
fee Cyn as
SPRKR ANT! Br ALC.
ANT BFO SPARE BT
ANTENNA ANT
© SENDS
Lvs
RCVR
Figure 2
XCITER
“ae Linear Amplifier can be driven by most
ommercial or home-built exciters with apower
output of approximately 100 watts, The Heathkit
HW-12, HW-22, andHW..32 Transceivers andthe
3-400 Transmitter are ideal for use with this
lnear Amplifier, Some modifications to the
HW-12, HW-22, and HW-32 Transceivers are
scessary, See Figure 3A, Exciters with an out-
it in the 40 to 60 watt range can be used to
arive the Linear Amplifier, however, the full
power capabilities of the Linear Amplifier cannot
= used,
NTENNA
The pi-network output is designed to work into
>, 50 @ line with an SWR not to exceed 2 tol,
Every
effort
should
be
made
to
get
the
SWR
of
the
antenna
down
to
less
than
2
to
1,
A mobile antenna rated at 1000 watts is recom-
mended
for
use
with
the
Linear
Amplifier,
How-
ever, satisfactory results have been obtained
from some antennas of a lower rating, If an
antenna is used with less than a 1000 watt rating
corona may appear at the tip of the antenna
while it is being used, Corona can be eliminated
by using a larger metal ball at the tip of
the antenna,
WARNING!
When
there
is
RF
output
from
the
Linear
during
transmit,
a
high
voltage
appears
on
the
antenna,
Do
not
transmit
when
anyone
is
near
the
antenna,
INTER CONNECTIONS
Figure 2 shows how to connect the Linear
Amplifier to the Heathkit SB-400 Transmitter,