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4.1 Connect your TCVR to the Linear using a short, 50 Ohm coaxial cable.
4.2 Connect your TCVR ground giving connector to the PTT RCA connector on the
rear panel of the Linear, using a screened cable.
In case your TCVR has an open collector PA controller output, you can use it
without difficulties. The input of the PA PTT is 24V 10mA.
4.3 Connect your aerial to the OUT socket of the Linear. VSWR must be better than
1:2.
4.4 Using a flexible cable at least 6mm
point and to the grounding point of the transceiver, and to ME3000-S HV power
supply.
4.5 Connect the power cord to the mains and switch on the equipment (ME3000-S).
Check before the exact input voltage of the ME3000-S (230 or 400V AC!). The
ON LED glows and the WAIT led start blinking for a period of abt. 180 sec,
during the heating period.
The readiness of the Linear is indicated by the OPR LED. If the PA was out of
use for a longer period (2-3 month), it would be advisable to keep the PA heated
without driving for a few hours. The control unit switch the high voltage to
linear, when the OPR LED lits. The vacuum relay can switch the HV only on
case if you connected the HV cable to linear!
4.6 Using the tuning mode of the TCVR (CW) give driving power to reach 300-400
mA indication on the PLATE meter. Push the FWD button and with the Tune
knob tune the Linear to reach maximum output power indication. Increase the
driving power until maximum anode current, than carry out fine tuning using
the Tune knob again. In case a 50 Ohm aerial, the power meter will indicate the
output power exactly.
REMEMBER THIS AMPLIFIER DOES NOT REQUIRE MUCH DRIVE POWER. SO
START WITH LOW DRIVE POWER, AND THEN TUNE TO RESONANCE AS
OUTLINED ABOVE. OTHERWISE, ARCING MAY OCCUR INSIDE YOUR
AMPLIFIER.
NEVER RUN YOUR AMPLIFIER FOR ANY SUSTAINED PERIOD WITH A SCREEN
CURRENT READING GREATER THAN
DAMAGE AND FAILURE OF THE TUBE(S) WILL RESULT, AND THEY WILL NOT
BE COVERED BY WARRANTY!
4.7 Check the grid 1 current using the Ig1 push-button. Reduce the driving power or
make fine tuning in case the grid current would exceed THE SPECIFIED VALUE!
Check the G2 current with G2 pushbutton.
10
4.0 INSTALLATION
, connect your PA to a suitable grounding
2
SPECIFIED. IF YOU DO,
POSSIBLE
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