Yaesu VL-2000 Operating Manual

Contents

17VL-2000 Operating ManualOperationlineAr A mpliFier operATionBefore operating, please check the following items:r Confirm whether wiring does not have a miss wiring again.r Confirm that the AC power plug connect to 220 Volt AC power directly. The VL-2000 requires 220 Volt AC power for1.5 kW operationr Confirm that the ATT switch is set to “on” position, when connect the exciter having exceed 100 watts PEP.r Confirm that the antenna SWR is less than 1.5:1.1. Turn the VP-2000 POWER switch “on”, then turnthe VL-2000 POWER switch “on”.2. Turn the transceiver’s POWER switch “on”.If using a Yaesu transceiver with a BAND DATA Ca-ble, and the REMOTE switch on the rear panel of theVL-2000 is set to “on”, the VP-2000 AC power willbe remotely controlled by the transceiver’s POWERswitch.3. Set the INPUT switch to the position which is con-nected to the exciter.4. Select the amateur band of the transceiver you wish tooperate on.If using a Yaesu transceiver with a BAND DATACable, band selection will occur automatically when-ever you change bands on the transceiver. Otherwise,select the amateur band of the VL-2000 to same asthe transceiver.5. Select the operating mode of the transceiver you wishto operate on.6. Set the OPERATE switch to “on”. The “OPERATE”LED will glow red.7. Press and hold the TUNE button for 1/2 second tobegin automatic tuning. The transmitter will be en-gaged, and the red TUNE LED will blink while tun-ing is in progress. When the optimum tuning pointhas been reached, the transceiver (and VL-2000) willreturn to receive, and the TUNE LED will glow redsteadily (instead of blinking).8. For SSB and CW operation, make sure to adjust theMicrophone Gain and/or Drive control on the trans-ceiver for proper ALC indication on the transceiverALC meter, as described in the transceiver manual.Generally, for SSB, the ALC meter indication shouldnot deflect beyond a certain ALC limit (the “ALC”zone on the transceiver’s meter) on voice peaks; onCW, the ALC indication should be just enough tocause slight meter deflection. Higher ALC levels mayproduce distortion or key clicks, without producingany additional power output.In the CW mode, the VL-2000 allows you to fullbreak-in operation. However, the full break-in opera-tion may give the stress to the T/R switching relays.For FM, SSTV, RTTY, or Packet operation, You mayenable 1.5 kW operations, if the following condition issatisfied.r Normal Temperature: +41 °F to +95 °F(+5 °C to +35 °C)r Normal humidity (45 % to 85 %)r Side Clearance: 10 inches (25 cm)r Rear Clearance: 12 inches (30 cm).Otherwise, press the LOW switch to select the LOWpower condition to prevent the overheating duringcontinuous operation.For AM operation, adjust the Drive or RF Powercontrol on the transceiver so that the METER-1 (“PO”meter) on the VL-2000 does not exceed 375 watts (on1.5 kW operation) or 125 watts (on 500 watt opera-tion) when transmitting a carrier.operATinG precAuTionSSummarized below are some precautions to adhere to in order to ensure long life and trouble-free operation withthe VL-2000.r Do not turning the POWER switch “on” or “off” while transmitting.r When changing bands, always make certain that the VL-2000 is set for the same band as the transceiver beforetransmitting, and that the proper antenna is connected.Remember that, when the VL-2000 is switched “off” the INPUT-1 jack is automatically connected to the ANT1 jack and the INPUT-2 jack is automatically connected to the ANT DIRECT jack.r Reduce the drive power (set the ATT switch to “on”), if the exciter output which you connected exceeds 100watts PEP.