MML_144-100-HS_(Manual操作说明书手册)

MML144/100-SMML144/100-HS144 MHz 100 WATTLINEAR AMPLIFIERS144 MHz 100 WATTLINEAR AMPLIFIER6MML1M4-100·SFEATURESDESCRIPTION.100 WATTSOUTPUT POWERSUITABLE FOR IO OR 25 WATTTRANSCEIVERS.These 144 MH:solid state linear amplifiers MML144/100-S andMMLI44/100-HS,are intended for use with any existing 144 MHZLINEAR ALLMODEOPERATION.transceivers with output powers of 10 and 25 watts respectively.STRAIGHTTHROUGH OPERATION WHEN TURNEDWhen used in conjunction with the appropriate drive sources,theOFEamplifiers will provide an output power of 100 watts.ULTRA-LOW NOISE RECEIVE PREAMPLIFIER FRONTPANEL SELECTABLESeveral front panel mounted switches controlling the internal.EQUIPPED WITH RF VOX AND MANUALOVERRIDEswitching circuitry,allow the unit to be left in circuit at all times.The linear power amplifier and the ultra low-noise receiveLED STATUS LIGHTS FOR POWER,TRANSMIT ANDPREAMPON.preamplifier,which are incorporated into the unit,can both beindependently switched in and out of circuit.In this way.all fouroperational combinations are possible.SPECIFICATIONBy means of an internal RF vox circuit the linear will automaticallyswitch on to transmit when 144 AH:drive is applied to the inputLinear Amplifiersocket.It is possible to override this facility by the connection of anearth to the phono socket located on the rear panel.ThisPower output100 watts±1dBconnection is compatible with all current transceiver ITT lines.ThePow...input0a1(L1440S!RF vox circuit is suitable for both SSB and FA modee25 watts (MML144/100-HS)Frequency bandwidthThe inclusion of the latest state of the art power transistor (rated at144-146XIH:at -I dBTower requirements138VDC at 12 Amm80W dissipation)guarantees highly reliahle and ukra-linearQuiescent current:IAmp(with tero drive】petformance,thus making the unit ideal for all modes of operation(SSB,FM.AM,CW'and SSTV).The PA transistor is thermallyReccive Preamptracked against temperature variation and operational temperaturerise.Overall gainOverall noise figure12 dB tyricalBetter than 1.5 dBThe receive preamplifier uses one of the latest dual gate FETs in aFrequency bandwidth144-146 AH:at -1.5 dBnoise-matched configuration.This technique,together with carefulReceive current130mAoptimisation of overall gain,makes the preamplifier ideal for useahead of any popular 2 metre transceiver.The sensitivity of currentGeneral2 metre transceivers is such that a preamplifier gain of 12 dB isRF connectorSO239sufficient to ensure an excellent overall system noise figure.A preamplifier with gain in excess of this figure will prove undulyWeight265xll7x54mm1.5Kgdetrimental to the strong signal-handling performance of thetmansceiver.All circuitry is constructed on high quality glass-fibre printed ciruitboard and protection is included against reverse polarity.The unit ishoused in a highly durable extruded alutninium enclosure.RF inputand output sockets are located on the rear panel together with thepower lead and phono socket.The unit is supplied with all necess