Kenwood AT-250 Instruction Manual

Also see for AT-250: User guide Instruction manual Manual Service manual

loro1HAT-250AUTOMATICANTENNA TUNER2=CAUTION1) The AT-250 is capable of sustaining 100W con-2FEATURES1.tinuous operating input power. However, duringauto tuning, very high voltage appears in thetuning circuit and the reflected impedance forthe transceiver varies greatly. Therefore, to pro-tect the transceiver, adjust the transmit outputto less than 50W before tuning.The antenna tuner is capable of matching a 20—150 ohm load, or approximately up to 2.5:1SWR. If the antenna and feed system exceed thisrange, the tuner may not stop, since it is beyondthe auto tuner’s capability. In this case, do notattempt further auto-tuner operation.To perform auto-tuner operation, first adjust theantenna and feed system.You are the owner of our latest product, the new AT-250 AutomaticAntenna Tuner. Please read this instruction manual carefully beforeplacing your unit in service. The unit has been carefully engneeredand manufactured to rigid quality standards, and should give yousatisfactory and dependable operation for many years.3) The antenna tuner enables to reduce SWR ofhigh SWR antenna.To transmit power efficiently, use the lowerSWR antenna correctly adjusted.All amateur bands covered in the HF range 4. POWER-SWR meterCovers all amateur bands including the new WARC bandfrom 1.8 through 28 MHz.. Automatic band selectionWhen connected to the TS-430, the operating band isautomatically selected from the transceiver.- Dual power source capabilityOperation from either 120, 220, or 240 V AC or 13.8VDC.Up to either 20 W or 200 W is indicated by the 5u ilt-inPOWER-SWR meter. When the METER switch i; set toSWR, SWR is autoamtically calculated and indiated onthe scale.. Four antenna jacksFour antennas cover a broad frequency range. Arty ofthese antennas can be selected by the ANTENNA switchon the front panel.In normal operation (with the RX switch OUT), ml-y thetransmission signal will pass through the antenn ¢ uner.AGSY |