QEI 675 - Page 18

www.SteamPoweredRadio.Com
NOTE:
To
Line
Cord
Primary
Power
XFMR
105-125V
Connection
To
Line
Cord
Primary
Power
XFMR
210-250V
Connection
Refer to Chasis Schematic
for
further
details.
b.
Mark
rear
of
chassis to
show
supply
for
which
unit
is
wired.
2.
Tap
Change
a.
If
Exciter
is
to
be
used
below
to
CRl
instead
of
Yellow
lead.
wer
to approximately
12
watts,
within the
unit.
12
watts ,
connect
Red/Yellow
lead
This change will
limit
output po-
but will reduce heat
dissipation
b.
Change
A4Rl0
from
820
ohm
to 1.5K. This insures
that
the
IPA-PA
supply stays in
regulation
with the reduced input voltage.
c.
Change A4Rl9 from 120
ohm
2
watt
to
68
ohm
2
watt.
This
insures
that
the
+15
volt
supply
stays
in
regulation
,
-18-