Vectronics VEC-621 User Manual download pdf

VEC-621 DUAL BAND VHF ANTENNA TUNER

INTRODUCTION

Thank you for purchasing the VEC-621 Dual Band VHF Antenna Tuner. The

VEC-621 covers frequency range from 144 MHz to 220 MHz. It will handle up

to 300 watts PEP of output power. It is designed to match a wide range of

impedances for coax fed antennas. The built-in SWR/Watt meter is usable for

both the 144 MHz and 220 MHz ands.

INSTALLATION

1. Connect your coax line fed antenna to the coax connector on the VEC-621

marked ANTENNA.

2. Connect a short coax line from the coax connector on the VEC-621 marked

TRANSMITTER to the antenna connector of your transceiver.

3. Connect a ground wire from the GROUND wing nut of the VEC-621 to the

transceiver ground or earth ground of your station.

OPERATION

SWR/Watt Meter

1. SWR Measurement:

a. Set the push button switch to SET position (IN).

b. Transmit a continuous carrier and set the SWR/POWER control for a full

scale meter deflection.

c. Set the push button switch to SWR position (OUT) and read the SWR on

the SWR scale of the meter.

2. Power Measurement (144 MHz):

a. Set the push button switch to SET position (IN).

b. For 30 watts range -- rotate the SWR/POWER control to the 30 mark and

read the power level on the 30 watt scale.

c. For 300 watts range -- rotate the SWR/POWER control to the 300 mark

and read the power level on the 300 scale.

Note

: The SWR/POWER control on the VEC-621 is factory calibrated for the

30 watt range. Do not reset the knob on this control. However, due to

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VEC-621 DUAL BAND VHF ANTENNA TUNER INTRODUCTION Thank you for purchasing the VEC-621 Dual Band VHF Antenna Tuner. The VEC-621 covers frequency rang

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component tolerance when precision reading is desired, the 300 watt range can be recalibrated as follows: a. Set the push button switch to SET positi

Related models: VEC-624

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