Vectronics VEC-621 - Manual

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