Command Technologies COMMANDER VHF-2000 Manuel utilisateur
COMMANDER VHF-1200/2000
LINEAR AMPLIFIERS
6 METERS - 50 - 54 MHz.
MADE IN THE U.S.A. BY HAMS FOR HAMS
COMMAND TECHNOLOGIES, Inc.
15719 CR 2.50
P.O. Box 326
EDON, OHIO 43518
419 459 4689
800-736-0443
THE COMMAND TECHNOLOGIES PHILOSOPHY
The company was founded upon the guiding principal of providing
amateur radio operators with better equipment at a lower cost.
That principal is evident in the company's products which have become
known throughout the world for their superior value.
Value is defined by the company as a ratio of quality plus performance
over cost. The higher the quality and/or performance or the lower the cost,
the better the value.
Obviously, the limits of each parameter of the equation are subjective. For
the company, quality limits are those which provide longevity and
unquestioned performance benefits to the user without unnecessary cost
burden. Performance is partly defined by governmental regulations and
partly by the company's integrity of specifications. For example, power for
Command Technologies linear amplifiers is specified by continuous carrier
ratings - solid, meaningful figures which can be translated into benefits in
the real world of amateur radio.
State-of-the-art technology has come to be a trite phrase, meaning
different things to different people. To the company, it means today's
proven technology, not gimmicks, which offer a facade with little of worth,
or need, behind it. We may push the leading edge of technology in various
ways, but it will be founded upon its value to the user in terms of
performance and cost.
We appreciate your purchase of a Command Technologies product and
assure you of continued factory support of your investment at all times.
Sincerely,
Patrick J. Stein
N8BRA
SPECIFICATIONS
COMMANDER VHF 1200
LINEAR POWER AMPLIFIER
FREQUENCY RANGE - 50 - 54 MHz.
MODES - USB,LSB,RTTY,FM,CW
POWER REQUIREMENTS -117/ 200/234VAC 50/60 Hz.
RF DRIVE POWER - 15 - 25 WATTS NOMINAL - 35-40
WATTS MAX. FOR FULL OUTPUT (1.2 KW SSB )
RF OUTPUT-+15DB GAIN OR OVER 750 WATTS
600 WATTS MAX. FM OR RTTY
INPUT IMPEDANCE - 50 OHMS UNBALANCED
REAR PANEL ADJUSTABLE
OUT PUT IMPEDANCE - 50 OHMS NOMINAL
ANTENNA LOAD -(VSWR) - 2 : 1 MAX.
HARMONIC SUPPRESSION - BETTER THAN
- 60 DB DOWN @ RATED OUTPUT
INTERMODULATION DISTORTION- BETTER THAN
- 35 DB DOWN @ RATED OUTPUT
WEIGHT - 75 LBS
CABINET SIZE 18 X 16 X 7.75 in.
TUBE COMPLIMENT - ONE 3CPX800A7 CERAMIC
METAL TRIODE
PRESSURIZED CHASSIS FORCED AIR COOLING
SPECIFICATIONS
COMMANDER VHF 2000
LINEAR POWER AMPLIFIER
FREQUENCY RANGE - 50 - 54 MHz.
MODES - USB,LSB,RTTY,FM,CW
POWER REQUIREMENTS - 200/234VAC 50/60 Hz.
RF DRIVE POWER - 15 - 25 WATTS NOMINAL - 35-50
WATTS MAX. FOR FULL OUTPUT (1.5 KW SSB )
RF OUTPUT- +15DB GAIN OR 1500 WATTS
1200 WATTS MAX. FM OR RTTY
INPUT IMPEDANCE - 50 OHMS UNBALANCED
REAR PANEL ADJUSTABLE
OUT PUT IMPEDANCE - 50 OHMS NOMINAL
ANTENNA LOAD -(VSWR) - 2 : 1 MAX.
HARMONIC SUPPRESSION - BETTER THAN
- 60 DB DOWN @ RATED OUTPUT
INTERMODULATION DISTORTION- BETTER THAN
- 35 DB DOWN @ RATED OUTPUT
WEIGHT - 75 LBS
CABINET SIZE 18 X 16 X 7.75 in.
TUBE COMPLIMENT - TWO 3CPX800A7 CERAMIC
METAL TRIODES
PRESSURIZED CHASSIS FORCED AIR COOLING
UNPACKING INSTRUCTIONS
Carefully remove your Commander Amplifier from its
shipping carton making sure there is no damage evident
from shipping. If there is any damage, notify the delivering
shipper immediately, fully describing the damage.
Do not destroy the packing material, since it may be
reusable later, should you require factory service, or need to
transport the Amplifier for any other reason.
!! WARNING !!
CONTACT WITH VOLTAGES
IN THIS AMPLIFIER CAN BE
!!! FATAL !!!
CAUTIONS
Do not attempt any type of service or repair on this Amplifier
without first removing the AC power and allowing at LEAST
60 MINUTES FOR THE HIGH VOLTAGE CAPACITORS
TO BLEED OFF !
Make no attempt to put this Amplifier in service with the top
or bottom covers removed. CONTACT WITH VOLTAGES IN
THE CABINET CAN BE FATAL !
Never attempt operation without first connecting an
appropriate antenna (2.0:1 VSWR Max) or a 50 ohm load
with sufficient rating or SERIOUS DAMAGE TO THE
AMPLIFIER MAY RESULT.
Never operate unit with more drive than required to produce
the rated output for the operating mode used.
Do not place the Commander VHF-Amp. in Repeater
operation. Extensive modification would be required for this
type of service.
Never operate any Amplifier using an extension cord.
Never cover the top of the Amplifier cabinet with books,
papers or other equipment as OVERHEATING MAY
RESULT.
IF ANY PROBLEM OCCURS NOT EASILY CORRECTED,
PLEASE CONTACT MANUFACTURER FOR
ASSISTANCE.
800-736-0443 419-459-4689
INTRODUCTION
The Commander VHF-1200/2000 are Grounded Grid class
Ab2 Linear Power Amplifiers that operate on the Amateur 6
meter band.
Over-Drive and Over-Grid current protection is provided by
an Auto-Reset circuit the places the amplifier in Stand-By if
a preset limit is exceeded.
Genuine Eimac 3CPX800A7 External Anode Triode(s) with
forced air cooling and modern circuitry, insure efficient and
conservative operation.
Reduced ratio (6 to 1) vernier drives on all tuning controls
allow smooth and easy tune-up.
Rear panel input tuning control allows a higher input circuit
"Q" for excellent linearity and a low input VSWR to exciter all
across the 6 meter band.
An automatic delay circuit, for proper cathode conditioning
before RF drive can be applied, extends tube life. A 50 ohm
resister in the plate supply positive lead and a 200 ohm
resister in the negative lead protect the tube in the event of
an arc.
The Commander VHF-1200\2000 feature a full compliment
of control and metering functions for easy on the air
operation.
A Dual Primary Power Transformer allows 117 / 234 VAC
operation. Additional primary taps are provided for 200 VAC
operation. Operation of the VHF-2000 on 117 VAC is not
recommended.
INSTALLATION PREPARATION
Location of your Commander VHF-1200/2000 requires that no equipment be placed
directly above it, as air expelled from the tube exhaust can become quite hot. Allow at
least 3 inches clearance on either side of the unit between other equipment.
To switch from transmit to receive the Commander VHF-1200/2000 requires a contact
closure or keying circuit capable of sinking 55 ma. of positive voltage (12 VDC. open
circuit) to ground. This connection is made to the RCA jack on the rear panel marked
relay. Read the manual that came with your Transceiver to find the proper external
connections. On some Transceivers, this is not provided, and an alternate circuit will be
required. You can key the unit manually by placing a shorted RCA plug in the relay jack
and using the standby / operate switch on the front panel. Always use shielded cable for
these connections.
The 12 VDC jack on the rear panel is an accessory for powering low current 12 VDC
devices (less than 100 mA.). Do not connect an external voltage source to the jack.
Connect a good quality Thruline Wattmeter between the Amplifier output jack and the
Antenna or Dummy Load using RG8 or better coax.
Connect the Exciter RF output to the Amplifier input using 50 ohm coax.
Connect as short a ground lead as possible from Earth Ground to the units rear panel
ground terminal.
TRANSFORMER INSTALLATION
(Hypersil VHF-1200/2000)
When mounting the hypersil transformer, place the VHF-1200/2000 so the
front panel faces your body. The wire leads coming out of the transformer
should be to the rear and the connector to the right. Place the transformer
in the unit aligning the transformer's mounting holes to the mounting holes
on the bottom of the chassis. Place the 1\4 - 20 screws threw the
mounting holes and chassis and secure with the 1\4 - 20 nuts and
washers. Connect the male-female "mate & lock" connector. Push hard to
insure that the two halves are locked together. The transformer should
now be installed ready for use.
TUBE INSTALLATION
Carefully remove the 3CPX800A7 tube(s) from the shipping carton.
This carton was located in the area where the transformer was installed. Place the
tubes in the tube socket with the proper pin alignment. If you have maintained the
proper pin alignment, the tubes should go into their sockets easily. If you have to use
undue pressure to insert the tubes, you may have the wrong pin alignment or one of the
pins may be bent. If necessary straighten pins with needle nose pliers and reinstall.
Install the parasitic chokes on the tube caps and replace the top and bottom covers.
The unit is now ready for operation.
117/200/234 VAC Operation
The Commander VHF-2000 comes factory wired for 234 VAC operation.
For best operation, you should use a dedicated 234 VAC main capable of
supplying 20 Amps of peak AC current. Unless for Export or user specified
all VHF-1200 Amps. are wired for 117 VAC.
All Commander Amplifiers manufactured for export are wired for 234 vac
or 200 vac depending on the final destination.
To convert the VHF-1200 to 234 VAC operation, remove the rear panel
connector cover located on the top left hand corner. CAUTION.... BE
SURE YOU HAVE REMOVED THE LINE CORD PLUG FROM YOUR
WALL SOCKET. IF YOU FAIL TO UNPLUG YOUR AMPLIFIER, YOU
WILL EXPOSE YOURSELF TO LETHAL VOLTAGES. After the cover
has been removed, do the following steps:
1. Loosen the screws and remove the jumper wire going from the terminal
block position 1 to 3. See illustration.
2. Unscrew and remove jumper connection at terminal block position 5
and place it at terminal block position 3. Secure all screws. See
illustration.
3. Replace rear panel connector cover
4. Remove the 117 volt plug and replace with an appropriate 3 prong 234
VAC 20Amp plug.
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