Related Manuals for MFJ MFJ-9040
Summary of Contents for MFJ MFJ-9040
- Page 1 40 METER CW TRANSCEIVER Model MFJ-9040 INSTALLATION MANUAL CAUTION: Read Instructions Before Operating Equipment ENTERPRISES, INC. P.O. BOX 494, MISSISSIPPI STATE, MS 39762, USA COPYRIGHT 1992 ENTERPRISES, INC. HEV.
- Page 2 MFJ—412 CURTIS IAMBIC KEYER MODULE and plug your favorite paddles. GO PORTABLE: Take your MFJ—9040 QRP station anywhere with MFJ-1774 PORTABLE DIPOLE matching MFJ-971 QRP TUNER. MFJ-4114 RECHARGING NiCd POWER PACK MFJ-4110 ULTRA-COMPACT...
- Page 3 TECHNICAL SPECIFICATIONS: RECEIVER SECTION: 7.000-7.150 Frequency Coverage Single conversion superhet Receiver Type: 4.85-5.0 V FO Frequency Frequency: CW—bandwidth crystal ladder filter Selectivity: Audio—der ived, instant T/ R recovery AGC: Sensitivity Better than .35uV range RIT: 8 Ohms, speaker external phones Audio 700—Hz 4—p01e active, unity...
- Page 4 THEORY OPERATION: technically inclined, read this page inside scoop" on your rig. Please refer Figure MFJ—9040 receiver a single—conversion superhet design. Received signals pre—selected 4—p01e bandpass filter LI—L2, then amplified converted 12 MHz by double—balanced mixer required 5—MHZ VFO signal...
- Page 5 MFJ-9040 CONTROL LOCATION FUNCTION: IAMBIC FILTER BYPASS PHONES STRAIGHT PANEL REAR low—Z phones ext. speaker. PHONE JACK: 3.5mm mono jack ID coaxial, center pin. POWER JACK: 5.5mm 2 . Imm KEY JACK: 3. 5mm mono jack handkey most keyers) ANTENNA JACK: SO—239...
- Page 6 3. 5mm monauralminiplug . wish to plug your paddles directly into the radio, install optional MFJ-412 CURTIS I AMBIC KEYER M ODULE (this accepts a 3.5mm You may continue to use a straight—key in stereo...
- Page 7 Antenna and feed are made with light—weight 300—0hm twin lead, and a special built—in matching network allows you to attach 50—0hmcoax between the MFJ—1774 feed and your rig. When installing the MFJ—1774,avoid running the twinlead portion of your feeder next to metal structures...
- Page 8 Pay attention to DX forecasts. When the band is hot, power difference often become much less significant. OPERATING NOTES NOVICES: Your MFJ—9040 is much easier operate than complex digital ——and less expensive purchase. multi—band transceivers This makes it perfect...
- Page 9 The FCC specifies that Amateur Radio license holders ultimately accountable operating radio transmitters only on assigned frequencies. OUTDOOR OPERATING: The MFJ—9040 is rugged, consider your radio's limitations: MFJ—9040 cabinet black, absorbs heat. Never operate your radio direct sunlight. The MFJ—9040 does have high—SWR shutdown...
- Page 10 ANYTHING that goes wrong with your radio first year — — matter what! And, MFJ Customer Service Technicians will be there help keep your shape as long as you own it. However, before call factory with a problem,...
- Page 11 FIELD ALIGNMENT PROCEDURES FOR THE MFJ-9040 TRANSCEIVER: SPECIAL TOOLS, PARTS, TEST EQUIPMENT: AC Power supply, MFJ-4114 or 13.8 volts @ 1.5 Amps Sensitive Voltmeter (DVM or Analog) Non—inductive Alignment Tool Frequency Counter QRPWattmeter with 50—0hm Resistive Dummy Load 7—MHZSignal Generator...
- Page 12 MFJ—9040 will easily exceed this level of suppression. This completes field alignment of the MFJ—9040 Transceiver. your transceiver fails to operate properly after following these procedures and adjustments, please call 800 647—TECH (800 647— ——or return your...
- Page 13 PARTS PLACEMENT, MFJ-9040: INTERNAL ADJUSTMENT LOCATIONS AND .TP2 tore *If polarity protection fuse is open,repair with a 1.5—A p igtale fuse or 3/4" #32 hairpin jumper. DC VOLTAGE CHART - TROUBLESHOOTING GUIDE: For advanced troubleshooters, the following are typical voltagesfoundin the MFJ—904 (variation of 0.2 or even0.3 V is...
- Page 14 MFJ-9040 Parts List MFJ PARTS # DESCRIPTION MFJ PARTS # DESIGNATION DESCRIPTION DESIGNATION 402-3404 Yellow Inductor 205-0022 22pF, SOVMultilayer 402-3406 6.5uH Inductor 200-0005 .1UF, Disc 401-0102 I OuH Inductor IA,5 200-0005 .1UF, 50/100v Disc 10-10125 18T Inductor L8,9 200-0004 .01uF, 25/50V Disc...
- Page 15 C7S ADA c 57 r op Q 10 I_J2 2 IJ3 XC63 C65Æ R 16 KEYER 4.3V R23Q5 V FO R41 DRV RFC2 C21C22 ctg ct3 T4RIt 2 135 7 C9 c66 -rc.4 1.5 OFFSET'+ SCHEMATIC DIAGRAM, MFJ-9040...
- Page 16 MFJ Enterprises, Inc. warrants to the original owner of this product, if manufactured by MFJ Enterprises, Inc. and purchased from an authorized dealer or directly from MFJ Enterprises, Inc. to be free from defects in material and workmanship for a period of 12 months from date of purchase provided the following terms of this warranty are satisfied.
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