pacting
the unit.
When a shipment
is returned
it will
be
handled
in one of three
ways ...
1.---Whereall
service
is
in warranty
the
shipment
will
be
returned
with
transportation
costs
collected
by the
carrier
on arrival.
2.---lf
there
are any charges
not covered
by warranty,
we
wi.11 hold
the shipment
and advise
you of costs
which
you
can then
send.
The shipment
will
arrive
with
only
trans-
portation
costs
collected
by the carrier
on arrival.
3. - - - Or
upon
your
written
authori zation,
we
wi II
ship
C. O. D. fo r any cha rgesnot
covered
by wa rranty;
then the
carrier
will
collect
these
charges,
and the transportation
costs
on arrival.
Unci aimed or refused
C.O. D. shipments
will
not be reshipped
until
payment
of service
and trans-
portation
charges
is received.
Shipment
will
then be made
collect
for
reshipment
transportation
charges.
Unclaimed
equipment
automatically
becomes
the
property
of
the
Manufacturer
60 days
after
date
of refusal
or return
and
will
be disposed
of for payment
of charges
due.
We WILL NOT ship by means of a carrier that will not fully
insure
the shipment.
Some carriers
have a
$200.00
limit.
The exception
to this
is when
there
is no other
means
(APO-FPO-etc.)
of shipment
than parcel post,
and then we
will ship by this
means
with your written
agreement
that
you assume
any loss
over that which the carrier
will in-
sure.
C.O.D.
shipments
cannot
be made
to APO-FPO
addresses.
All
replacement
parts
orders
must
be prepaid
or C.O. D.
only.
Replacement
part price
quotes
will
be furnished
on request
for
those
who
desire
prepaid
shipment
or cannot
accept
C.O. D. shipments.
Hy-Gain
Electronics
Corporation
warranty
each
new pro-
duct
manufactured
to be free
from defects
in materi al and
workmanship
and agrees
to remedy
any such defect,
or to
furnish
a new part,
in exchange
for
any part
of any unit
which
under
normal
installation,
use.
and
service
dis-
closes
such
defect
within
ninety
days
from
the
date
of
purchase
by original
owner.
This
warranty
does
not
extend
to
any
of
our
products
which
have
been subjected
to mi Souse. neglect.
accident,
incorrect
wiring
not our own.
improper
installation
or to
use in violation
of instructions
furnished
by us.
Nor does
it extend to units
which
have been repaired
or altered
out-
side
of our factory
nor to accessories
used therewith
not
of our own manufacture.
Hy-Gain
Electronics
Corporation
reserves·
the
right
to
make any changes
deemed necessary
or desirable
without
advance
notice
or
incurring
any obligation
to make
like
changes
in units
previously
manufactured
or sold.
This warranty
does not cover
transportation
or install
ation
costs
that may be incurred.
Hy-Gain
Electronics
Corpora-
tion's
sole
liability
is
remedy
of
any
defect
for
ninety
days.
Hy-Gain
Electronics
Corporation
is not responsibl
e
for
personal
injury
or property
damage
resulting
from
i
proper
or careless
insta: I!ation
or usage
not
intended
b"
the manufacturer.
No
person
is authorized
to assume
for
us any other
lia-
bility
in connection
with
the sale of our products.
A II warranti
es are voi d and termi nated
one year
after
th
i'
last
unit
of its type
and design
has been manufactured
b\
us.
Hy-Gain
Electronics
Corporation
Attention:
Customer
Service
Department
R.R. #3
Lincoln,
Nebraska
68505
You must furni sh model
number.
date,
place
and proof
of
purchase,
such as a copy of the sales
receipt
to establ ish
warranty.
Your letter
should
include
all
pertinent
details
(Jlong with
part or item numbers
involved.
Do Not return
anything
until
requested
to do so.
No warranty
card
is
furnished.
You must supply the above
information.
Any
returned
items
must have prior
authorization.
Unex-
pected
returns
are
greatly
delayed
in
handling.
These
delays
can
be avoided
by writing
in advance
furnishing
the above
information.
ALIGNMENT:
All
internal
adjustments
of
the
:l21A
were
made
atth·
factory
prior
to shipment.
The accuracy
of the meter
IS
dependent
upon the
adjustment
of these
control s and do
not require
any further
adjustment.
No attempt
should
be
made to disturb
the settings
unless
precision
test
equip-
ment is used.
If internal
adjustments
are to be attempted
the following
test equipment
must be used.
A 50 ohm resistive
dummy load capable
of 500 watts
con-
tinuous
duty,
an accurate
RF voltmeter
equivalent
to the
Hewlett
Packard
410-B or 410-C,
a transmitter
with
varia-
ble output
to at least
500 watts
on 30 MHz.
and an insu
lated al ignment
tool.
Remove the covers
from the indicator
and sensor
units.
Connect
the short
I ength of cabl e from the sensor
unit
lC
the transmitter.
Using
a piece
of coaxial
50 ohm cabl e,
connect
the
dummy
load
to
the
S0-239
socket
on the
sensor.
Switch
the indicator
unit
to FWD, key the transmitter
and
adjust
the Cal ibrate
control
for full
scale,
switch
to SV\JR
and
if any
reflected
power
is present.
adjust
the pistoll
trimmer,
in the sensor.
for a minimum.
Un key.
POWER ADJUSTMENT:
.
Switch
the 421A to the 10 watt
position.
With the RF vol
t
meter
connected
across
the dummy load.
apply
power
and
increase
it until
exactly
22 voltsRrv1S
is
across
the ioacl.
Adjust
the
small
trimmer
pot
(R1).
see
reverse
side
(if
circuit
board.
so that
the
421A
reads
exactly
10 watts.
Switch
to the 100 watt
range and increase
power
until
the
volt
meter reads 70 volts
RMS.
Adjust
the center
pot (R2)
until
the 421A reads
100 watts.
Swi tc.h to the 500 watt
range and increase
the power
unti i
the
volt
meter
reads
158 volts
RMS.
Adjust
the trimmer
pot (R3) unti I the 421A reads 500 watts.
