MIRAGE BD-38-G
Contents
1. SWR METER OR POWER METER FIGURE 2 MIRAGE BD 38 G 144 430MHz DUAL E T BAND ANTENNA Oo 144 MHz BAND Sel Se DURLEXER TRANCEIMVER a s 430 MHz BAND DC STABILIZED POWER __ TRANCEIVER SUPPLY OR BATTERY SWR METER OR POWER METER FIGURE 3 MIRAGE BD 38 G 144MHz BAND 430MHz BAND CLEELLELLLE LJ ANTENNA ANTENNA tS 144 430MHz DUAL C BAND TRANCEIVER DC STABILIZED POWER DUPLEXER SUPPLY OR BATTERY L a o SWR METER OR POWER METER MIRAGE BD 38 G Dual Band Amplifier During 144MHz 440MHz crossband full duplex operation there may be some minor interferences such as noise on certain frequencies depending on the combination of Transmit Receive frequencies selected Select TX RX frequencies which show no interferences and or trouble especially with a 144MHz band transmission and a 440MHz reception Select frequencies that are not mutually harmonic With some regulated DC power supplies the output voltage may rise to an abnormal level resulting from malfunctions due to RF signal intrusion Therefore use a power supply with sufficient current capacity as well as with good protection against RF intrusion If the power supply malfunctions discontinue operation by turning the power switch off If the ampl2. 601 323 8287 You will be best helped if you have your unit manual and all information on your station handy so you can answer any questions the technicians may ask You can also send questions by FAX to 601 323 6551 Send a complete description of your problem an explanation of exactly how you are using your unit and a complete description of your station MIRAGE BD 38 G Dual Band Amplifier 300 Industrial Park Road MIRAGE TEL 601 323 8287 COMMUNICATIONS EQUIPMENT FAX 601 323 6551 ONE YEAR LIMITED WARRANTY Any Mirage Communications product found to be defective in materials or workmanship will be repaired or replaced at Mirage s option for a period of one year from the date of original purchase During the warranty period Mirage Communications will provide free of charge both parts and labor necessary to correct defects in material or workmanship To obtain such warranty service the original purchaser must 1 Provide proof of purchase 2 Ship the product in its original container or equivalent fully insured and shipping charges prepaid to Mirage as addressed below 3 Mirage agrees to repair without charge to the original owner any defective product under warrantee provided the product is returned with postage prepaid to Mirage with a personal check cashiers check or money order for 10 00 covering postage and handling e All internal adjustments are factory set for best performance consistent
3. MIRAGE BD 38 G Dual Band Amplifier MIRAGE BD 38 G DUAL BAND POWER AMPLIFIER INTRODUCTION The Mirage BD 38 G is a 80 60 watt dual band power amplifier for use with today s dual band handie talkies operating in the 144 440MHz bands We have succeeded in the development of a cross band full duplex function and have incorporated it into this design The BD 38 G is a remarkable and useful dual band power amplifier for the discriminating Amateur Radio operator This compact dual band power amplifier has two independent GasFET pre amp for VHF and UHF bands FEATURES High output power Up to 80 watts at 144MHz or up to 60 watts at 440MHz Output is achieved with 2 to 5 watts input Input power from 0 25 to 5 watts With an input power of 5 watts maximum the Mirage is compatible with most modern hand held tranceivers Automatic Frequency selection and control circuit This allows the amplifier to have only one input connector and makes for a perfect match for today s dual band radios and dual band antennas Separate VHF and UHF Pre Amps Separate LED Indicators for VHF and UHF Pre Amp usage LED Bargraph Power Level indicator Hi SWR and Over Temperature Protection Patch Cable included BNC to PL 259 Input 13 8 VDC at 15 amps Size 6 5 W x 2 5 Hx9 D One Year Warranty MIRAGE BD 38 G Dual Band Amplifier SPECIFICATIONS FREQUENCY 144 TO 148MHz 430 TO 450MHz RF INPUT 0 25 5 watts RF OUTPUT Up to 60 wa
4. ifiers power cables are connected in reverse polarity the cables could sustain damage especially when your source is a battery Be sure to check the polarity before connection After confirmation of proper connections etc turn the power switch ON Transmit either a 144MHz or a 440MHz signal to the antenna and confirm the SWR is at the proper level Switch the band of operation opposite of the one selected above and transmit again to confirm that the amplifier has detected the proper band and the SWR is at the proper level To operate the pre amp simply turn the switch corresponding to the proper band to the ON position The LED for this band will light up and indicate that the pre amp is in use TROUBLESHOOTING The Mirage BD 38 G is designed for long trouble free performance and should not require extensive troubleshooting in the field If difficulty is encountered check the following before assuming the amplifier has a malfunction 1 Loose antenna or power supply connections VSWR of the antenna system Coaxial cables from radio to amplifier and amplifier to antenna Output voltage of power supply Power output of radio Oye SO GS oe Improper fuse rating MIRAGE BD 38 G Dual Band Amplifier TECHNICAL ASSISTANCE If you have any problem with this unit first check the appropriate section of this manual If the manual does not reference your problem or your problem is not solved by reading the manual you may call MIRAGE at
5. incorporates a FUSE holder The Black wire is for negative The Mirage BD 38 G amplifier requires a source of 13 8 Vdc at 15 amps MIRAGE BD 38 G Dual Band Amplifier INSTALLATION AND OPERATION The Mirage BD 38 G may be mounted using the bracket not supplied or simply placed in a convenient operating position In either case there must be adequate ventilation for the finned heat sink This generally means at least 1 inch clearance from the heat sink to any surrounding enclosure and an unobstructed flow from the front to the back of the heat sink Do not operate the amplifier in places where it will be exposed to direct sunlight or a nearby heat source such as heaters radiator etc CAUTION With extended use the heat sink becomes VERY HOT If it is necessary to extend the DC power leads use wire of the same gauge in order to avoid a voltage drop on your power leads Be careful that the DC power supplied is no higher than 15 Volts or damage may result A source voltage of 13 8 Vdc and 16 amps is recommended and should be used whenever available Some automobiles will generate a high current surge when started It is recommended that the amplifier be placed in the OFF position when starting your vehicle Use a minimum length of good quality 50 Ohm cable between the radio and the amplifier The antenna system should have a VSWR of 1 5 1 or better for best performance If used in a mobile installation choose a good mobile antenna which wi
6. ll withstand the power of this amplifier Be sure to check the SWR for any degrading once the antenna has been heated by a few minutes of operation An antenna with a rating of 100 watts is recommended Never connect the rubber duck antenna supplied with your tranceiver directly to the antenna connector of the amplifier unit by use of a SO 239 to BNC converting unit or by any other means It may cause damage to both the amplifier and the rubber duck When utilizing a mono band antenna check the transmitting frequency of your radio and be sure that it is matched to the type of antenna you are using prior to operation Furthermore when inserting coaxial switches to either or both input or output of the power amplifier in order to operate two sets of tranceivers and antennas of which the frequencies differ be sure to carefully check switch positions MIRAGE BD 38 G Dual Band Amplifier A typical connection of this amplifier with duplex type dual band tranceiver and a dual band antenna is shown in Figure 1 If connection of this amplifier is made with either two tranceivers or two antennas please refer to Figures 2 or 3 FIGURE 1 MIRAGE BD 38 G 144 430MHz DUAL BAND ANTENNA 144 430MHz DUAL 2 BAND TRANCEIVER a DC STABILIZED POWER SUPPLY OR BATTERY
7. tts at 440MHz and up to 80 watts at 144MHz DUTY CYCLE INTERMITTENT ICAS MODES F3 FM Deluxe Dual Band Amplifier ON VHF UHF with separate VHF UHF Pre Amps PRE AMP Oo O O VHF UHF SWR MIRAGE Ooo0 6 POWER BD 38 G antenna MIRAGE Starkville MS USA POWER Made in Taiwan MIRAGE BD 38 G Dual Band Amplifier EXPLANATION OF FEATURES Front Panel POWER ON Switch This switch turns on the power to the amplifier When the power switch is engaged the amplifier is ready to amplify any signal of the proper frequency applied to its input VHF Pre Amp Switch This switch turns the pre amp on for the VHF 144 148MHz band Pre Amp VHF LED This LED indicates status of the VHF 144 148MHz band pre amp When the LED is ON the pre amp is active UHF Pre Amp Switch This switch turns the pre amp on for the UHF 430 450MHz band Pre Amp UHF LED This LED indicates status of the UHF 430 450MHz band pre amp When the LED is ON the pre amp is active SWR LED This LED will turn ON if the SWR of the antenna used is too high When this light is on there will be no amplified output from the BD 38 G due to the protection circuit inside the amplifier Back Panel ANT RF OUTPUT The coax from your antenna is connected to this port RADIO RF INPUT The coax from your radio or exciter is connected to this port DC PWR 13 8V This port has two wires The Red wire is for positive and
8. with reliable operation Changing internal adjustments may void this warranty Improper maintenance or repair may also void this one year warranty We recommend that units requiring repair during the warranty period be returned to the factory e This unit was not designed for repeater operation and its use in such service is at your own risk Mirage assumes no responsibility for any item connected to or used in conjunction with this product e The foregoing constitutes Mirage s entire obligation with respect to this product and the original purchaser and any user or owner shall have no remedy and no claim for incidental or consequential damages All Mirage products to be serviced in warranty or out of warranty should be shipped freight paid to Mirage 921 Louisville Road Starkville MS 39759 USA Product must be accompanied by a letter describing the problem in detail Be sure to include YOUR NAME ADDRESS AND TELEPHONE NUMBER This warranty gives specific legal rights and you may also have other rights which vary from state to state WARNING This unit should not be operated with the cover removed The cover confines RF radiation The harmonic filters contained in the circuit will not suppress direct radiation that may result if the cover is removed
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