Heathkit HW-12 - Page 38

4000
2, Install a 4602 4 to 7 watt resistor and a
10 KQ 7 to 10 watt resistor atthe OPTION-
L locations in section 4A of the circuit
ard, These resistors should be placed
about 1/4" above the circuit board to pre-
vent heat damage to the board, Use 1/2"
of sleeving on each lead,
3. Install the short OPTIONAL jumper at V in
section 4A of the circuit board,
When wired in this manner, the Transceiver
will not turn the Power Supply On or Off,
therefore, the Power Supply switch must be
used for this purpose, Turning the Transceiver
FUNCTION switch to the OF F position will leave
the Transceiver turned On, as in the TUNE
position,
If you wish, the HP-20 can be modified as
foliows so that it can be switched On and Off
with the FUNCTION switch of the Transceiver,
MMU
2
me
| an
Refer
to
Figure
2
for
the
following
steps,
1, Connect a short wire from lug 2 of terminal
strip HH (S-5) to lug 8 of socket P (S-1).
3.
Install
the
short
OPTIONAL
jumper
at
V
in
2,
Connect
a
short
wire
from
lug
4
of
terminal
|
strip
HH
(S~4)
to
lug
5
of
socket
P
(S-
1).
Now the switch of either the Transceiver or the
Power
Supply
will
turn
the
Power
Supply
On
and)
Off, The switch of the Power Supply should be
left
in
the
Off
position
at
all
times;
use
the
;
Transceiver
FUNCTION
switch
to
switch
the
|
system On and Off,
If
the
HP-20
Power
Supply
is
alternately
used.
with
another
piece
of
equipment,
its
On-Off
/
switch
will
function
normally
if
pins
5
and
8
of}
the
power
cable
connector
at
the
Power
Supply
|
are
not
used,
HEATH HP-10 POWER SUPPLY
Connect the octal socket with cap to th
ceiver end of the power cable accor
e
ding
ure 1,
Connect
an
octal
plug with
cap
tothe
he
Power
Supply
|
end
of
the
power
cable
as
fol
aA AS LOLs!
PLUG PIN# CABLE WIRE COLOR
1 Green (S-1)
2 White (S-1)
3 Orange (S-1)
4 Yellow (S-1)
5 Red (S~1)
6 No connection
7 Blue and Black (S-2)
8 Brown (8-1)
NOTE:
The
OPTIONAL
resistors
mentioned
below
are
not
supplied
in
the
kit,
These
resistors
can
be
obtained
from
a
local
parts
supplier.
. Remove the long jumper in sec
the Transceiver circuit board,
2.
Install
a
1000
2
4
to
7
watt
resistor
and
a
10 KQ 7 to 10 watt resistor at the OP.
Oe UL VE
TIONAL
locations
in
section
4A
of
the
cir-
cuit
board,
These
resistors
should
be
oe t= Vere e sale
placed
about
1/4"
above
the
circuit
board
to
prevent
heat
damage
to
the
board,
Use
aS IE. WOU
1/2" of sleeving on each lead,
section 4A of the circuit board,