OVERVIEW M2 Antenna Systems, Inc. Model No: 2M-1K2 2M High Power Amplifier WARRANTY ADDENDUM TROUBLESHOOTING INSTALLATION Operating Instructions PLEASE READ BEFORE USE AND SAVE M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722 Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com ©2011 M2 Antenna Systems Incoporated 3/1/12 Rev.
OVERVIEW CONTENTS SECTION........................................................... PAGE COVER PAGE ........................................................1 CONTENTS ...........................................................2 OVERVIEW ...........................................................3 Introduction .................................................3 Features ......................................................3 Major Components........................................4 Theory of Operation.....
INTRODUCTION It is with great satisfaction that M2 now offers a true breakthrough in high power VHF amplifiers. Our goal has always been to offer the most carefully designed, high performance antenna products. Now we offer the same high performance in VHF amplifiers. The 6M-1K2 and the 2M-1K2 utilize the new Freescale™ LD MOS FET (MRFE6VP6IK25H), a single device specified to produce 1.25 kW with as little as 3 watts of drive from HF to 600 MHz.
OVERVIEW OVERVIEW MAJOR COMPONENTS, 2M-1K2 FRONT PANEL 1. +50V LED (Yellow). Indicates +50 VDC is present from the power supply 2. Ready LED (Green). Lights when the Power switch is on and the amplifier is ready to be keyed and driven. 3. VSWR/TEMP LED (Amber). When lit, indicates an excessive VSWR condition (2.5:1 or greater) at the output, or when the amplifier is overheating. 4. JT Mode LED (Green).
OVERVIEW OVERVIEW 9 10 11 12 13 REAR PANEL (shown with optional power supply) 9. Key Jack. Ground to transmit. The total keying current is under 10 mA. 10. RF In. 25-50 W nominal. 11. RF Out. It is strongly recommended that an external wattmeter be connected here. Use .405” or larger diameter, 50 ohm coaxial cable capable of handling full rated output power. RG-213, LMR-400 or similar cables are suitable. 12. Terminal Strip. Provides connections for fans, +13.
OVERVIEW OVERVIEW THEORY OF OPERATION The 2M-1K2 designation, indicates the amp works on the 2 meter Amateur Band and is capable of at least 1.25 kW of RF output. A single MRFE6VP61K25H Freescale™ LDMOSFET solid state device is the heart of the amplifier. Because most modern Amateur transceivers have a 25-50W output on 2M, the gain of the device must be reduced so the input level is dropped to 4 to 5 watts so the device is not overdriven as fatal damage will occur.
voltage also passes through the transformer. The emitter of the device is grounded to its flange base (header) which in turn is attached to the copper heat spreader. There is a common ground then in the system between the chassis, the PC board and the heat sink system. This ground connection is very important for heat transfer and also for total device current flow.
INSTALLATION TYPICAL INSTALLATION M2 ANTENNA INSTALLATION WATTMETER KEY OUT ANT XCVR KEY KEY ANT TX 2M-1K2 Power Amplifier Transceiver 220 VAC (Nom.) 50/60 Hz 15 A Max (Models w/PS) PWR or 48-50 VDC @40-50 A INSTALLATION CONSIDERATIONS • • WARNING: SAFETY IS ALWAYS A PRIORITY! ALWAYS OBSERVE APPROPRIATE ELECTRICAL SAFETY PRECAUTIONS WHEN INSTALLING AMPLIFIERS AND RELATED EQUIPMENT. CAUTION: THE USE OF LIGHTNING PROTECTION DEVICES ON ALL CABLES ENTERING ANY BUILDING IS STRONGLY ENCOURAGED.
TROUBLESHOOTING TROUBLESHOOTING GUIDE Problem Possible Cause Solution No +50 V LED (Yellow) when the ON/OFF switch is actuated. AC voltage to power supply is below 185 VAC. Verify that 220-240 VAC is present where you plug into 220 VAC. There are no external AC fuses. 50 VDC is not on, or the input is below 45 VDC. One or both small red jumpers on the rear of the PS are dislodged. Troubleshoot the power supply AC and DC connections by removing the rear safety cover.
TROUBLESHOOTING Still don’t see what you are looking for? TROUBLESHOOTING This guide is not all-inclusive, as there is just no way to predict every failure. However, we will be more than happy to provide any assistance we reasonably can. Please see “Support, Service and Returns” below. SUPPORT, SERVICE AND RETURNS If you have followed the provided troubleshooting steps and your product is still not performing as specified, please contact us for further technical support.
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ADDENDUM PARTS LIST FOR 2M-1K2 DESCRIPTION .......................................................................QTY ADDENDUM 2M-1K2 2M High Power Amplifier ................................................ 1 2M-1K2 Operating Instructions.................................................... 1 RSP-2400-48 power supply Operating instructions (If applicable)... 1 3 Amp Fuse (spare). .................................................................. 1 Q3 Keying Transistor, ZTX601B (spare) .....................
ADDENDUM SPECIFICATIONS Model ...................................... 2M-1K2 Frequency Range ....................... 144-148 MHz Power Out ................................. 1250 W PEP Drive Input (Max Output) ........... 50 W Modes ...................................... SSB, CW, JT65, FM AM Duty Cycle in JT, FM or AM ......... 40% (45 sec. on, 75 sec. off) Efficiency................................... 65-80% Power Requirements: DC .................................. 48-50 VDC @ 40 A AC ......................
ADDENDUM WSJT: What Is It and How Do I Get It? A special EME and weak-signal primer by renowned EME expert Mike Staal, K6MYC. WSJT is a new weak signal mode enhancing communications with signal near or below the audible signal level. The 6M-1K2 amplifier is designed for the 50% duty cycle used in this mode. WSJT is a FREE program written by Nobel prize winning Physicist Joe Taylor, K1JT.
ADDENDUM WSJT: What Is It and How Do I Get It? (Continued) One last bit of information you will need to get started using EME. Since most signals from the moon are at or below the noise they may not be detectible by the human ear. A chat room has been created to allow you to communicate with others doing EME and find where others are transmitting so you can “listen” and watch for them. Again using Google is easiest. Type in “N0UK EME-1 (that is “November Zero Uniform Kilo). Click on JT65 EME-1—chris.
12 MONTH LIMITED WARRANTY This warranty gives you specific legal rights. You may also have other rights which will vary from state to state or province to province. M2 warrants the 2M-1K2 amplifier against defects in material and workmanship for a period of 12 months from date of purchase. During the warranty period, M2 will, at its option, either repair or replace products or components which prove to be defective.
