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VC-300M
Owner's Manual

Vectronics VC-300M Owner's Manual

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VC-300M Antenna Tuner

Owner's Manual

Vectronics VC-300M Antenna Tuner

FEATURES

The Vectronics VC-300M Antenna Tuner optimizes the performance of your antenna and

transmitter, receiver, or transceiver by providing adjustable impedance matching. The

VC-300M also measures the Power and Standing Wave Ratio (SWR), allowing you to

adjust for the lowest possible ratio for the selected transmit frequency. The VC-300M

utilizes a precision frequency compensated lighted dual movement SWR/Power meter

which can show either peak or average readings.

SPECIFICATIONS

FRONT PANEL INDICATORS

Meter ....................................Dual movement lighted cross needle Power and SWR meter.

FRONT PANEL CONTROLS

TRANSMITTER Tuning .....Continuous rotation capacitor

ANTENNA Tuning ..............Continuous rotation capacitor

INDUCTANCE ....................48 Turn Switched Rotary Inductor

RANGE ................................2 position switch: 30W/300W

METER ................................2 position switch: PEAK/AVG

LAMP...................................2 position switch: ON/OFF

REAR PANEL CONNECTORS

INPUT ..................................SO-239 Connector

OUTPUT ..............................SO-239 Connector

12 V AC/DC.........................2.5 mm Barrel Connector

GROUND.............................Post/Wingnut

OTHER

Frequency Coverage .............1.8-30 MHz

Power....................................150 Watts Continuous; 300 Watts pep, SSB

Dimensions...........................3.6" (92 mm) H x 7.25" (184 mm) W x 8.75" (222 mm) D.

Weight ..................................2.5 lbs. (1.15 kg)

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Summary of VC-300M

Page 1
Vc-300m antenna tuner owner's manual 1 vectronics vc-300m antenna tuner features the vectronics vc-300m antenna tuner optimizes the performance of your antenna and transmitter, receiver, or transceiver by providing adjustable impedance matching. The vc-300m also measures the power and standing wave ...
Page 2
Vc-300m antenna tuner owner's manual 2 contols / connectors front panel functions 1. Transmitter continuously adjustable input capacitor 2. Power / swr meter dual needle meter displays foward and reflected power in watts. The swr in measured where the two needles intersect on the red scale. 3. Anten...
Page 3
Vc-300m antenna tuner owner's manual 3 rear panel connectors 1. Transmitter in coaxial connector for input from swl receiver or transmitter. 2. Antenna coaxial connector for output. 3. 12v ac/dc barrel connector for meter lamp power. 4. Ground post/wing-nut type ground connector. Installation carefu...
Page 4
Vc-300m antenna tuner owner's manual 4 installation procedures 1. Connect a coax cable from your transmitter or receiver to the transmitter to the transmitter connector on the rear panel. Keep the cable as short as possible. Do not use more than 200 watts through the tuner. 2. To avoid possible dama...
Page 5
Vc-300m antenna tuner owner's manual 5 4. If you use a linear amplifier, set it to standby. Do not use the linear amplifier until the vc-300m is tuned. Do not exceed 300 watts! 5. Set range switch to 30w (button in). 6. Rotate the transmitter, antenna, and inductor controls for maximum noise or sign...
Page 6
Vc-300m antenna tuner owner's manual 6 meter calibration meter calibration procedure 1. Connect transceiver to transmitter in connector. 2. Connect external 50 Ω load to antenna connector. 3. Set the range button to 300w. 4. Apply 100w of rf at 14.0 mhz. 5. Adjust r1 (see figure 1) so that 100w of f...
Page 7
Vc-300m antenna tuner owner's manual 7 schematic diagram model vc-300m.
Page 8
Vc-300m antenna tuner owner's manual 8 technical assistance if you have any problem with this unit first check the appropriate section of this manual. If the manual does not reference your problem or your problem is not solved by reading the manual you may call vectronics at 601-323-5800. You will b...