Installation - Henry Radio 3K -Classic Operating And Maintenance Manual

HENRY 3K·CLASSIC AND 3K·CLASSIC X OPERATING AND MAINTENANCE MANUAL
SECTION 1
The 3K·Classic amplifier is a high·quality, one-stage
linear amplifier using one rugged, high-gain Eimac
8877 ceramic triode operating in a grounded grid circuit.
The equipment is a completely self-contained floor
model 2000 watt PEP input amplifier (3300 watts for
the X model) using only the highest quality compon-
ents that are available. In the tradition of Henry ampli-
fiers, the 3K-Classic is designed for complete linearity
and conservative operation, resulting in clean signals
with no RF interference. The amplifier is designed
for SSB, CW, or RTTY (AFSK or FSK) operation in
the amateur bands between 3.5 and 30 MHz. The
amplifier can be modified for frequencies outside the
amateur bands for commercial or military operation.
The 3K-Classic is factory wired for 220 VAC operation.
Please read the operating instructions to familiarize
yourself with the equipment before attempting opera-
tion. Please note the following operating cautions:
CAUTION: There are lethal high voltages present
inside the amplifier whenever the amplifier is in the
SECTION 2
SECTION 2.1 UNPACKING
Remove the amplifier from its shipping carton and
packing material, and examine it carefully for visible
damage. If the linear has been damaged in shipment,
save the box and packing material and notify the trans-
portation company immediately. It is wise to save the
box in any case because it is expensive to replace and
will be useful in protecting the 3K-Classic should you
ever decide to ship or move it to another location. The
amplifier is shipped ready to operate with the exception
of a power plug. A power plug that mates with the
power socket at the operating location must be properly
installed as described in Section 2.3 before the unit
can be operated.
The following accessories should be included with each
amplifier: .
1 I nstruction Manual
1 Warranty Card
1 PL-259 Coax Connector
1 Drive Cable (RG-58)
2 Shielded Control Cables
5 3AG, 1.5 amp Fuses
5 8AG, 1.5 amp Fuses
1 Tube Puller
SECTION 2.2 OPERATING LOCATION
The amplifier may be located wherever desired provided
there is adequate air flow from the bottom of the unit
up through the top and back of the amplifier. Do not
INTRODUCTION
POWER mode. Never remove the top cover or back
panel without excercising utmost caution!
CAUTION: The 8877 requires 90 seconds of warmup,
regardless of how long the amplifier has been turned
off. Under normal operating conditions the delay relay
will indicate the warmup period. However if the amp-
lifier is turned off after it is warm and turned on again
within a few seconds the delay relay may not indicate
warmup. THE TUBE STILL REQUI RES 90 SECONDS
WARMUP, AND WILL BE DAMAGED IF IT IS OPER-
ATED BEFORE IT HAS WARMED UP!
NOTE: The 8877's performance is very sensitive to
filament voltage. Before operating the amplifier check
that the filament voltage is correct as described in the
manual.
NOTE: The 8877 may be damaged if grid current
exceeds approximately 80 ma o
INSTALLATION
restrict the airflow of the amplifier, and do not place
it too close to a wall which might restrict the airflow
out of the back of the unit.
You will require a location that has an appropriate
220 VAC power source. A location which avoids
environmental extremes of heat, humidity, and dust
will keep the amplifier new looking and assure years
of reliable operation.
SECTION 2.3 CABLING
All of the following cables must be connected before
operation of the amplifier.
POWER CABLE· The 3K-Classic is equipped with a
3 wire power cable that is connected for 220 VAC,
single phase, 60 Hertz operation. A factory modifica-
tion is required for 50 Hertz operation.
The three wires in the power cable are black, white, and
green. The green wire is the chassis ground and the
neutral on the 220 volt plug. The black and white wires
connect to the "hot" 220 VAC circuits. A power plug
is not supplied because there are many different types
of 220 VAC outlets. We suggest that you consult with
a local electrician for the proper connection of your
plug type.
CAUTION: The amplifier will be damaged if the
green wire is connected incorrectly. Make sure that
the green wire is connected to the neutral connection.