Related Manuals for Mechanics & Electronics ME750-FD
Summary of Contents for Mechanics & Electronics ME750-FD
- Page 1 OPERATING MANUAL ME750-FD 4/6m LINEAR AMPLIFIER 2XGI7BT LED BARGRAPH VERSION Mechanics & Electronics Inc. Hungary Draskovits Gábor HA1YA Szombathely, Kárpáti K. u. 43. H-9700 e-mail:ha1ya@chello.hu www.ha1ya.hu...
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Page 2: Table Of Contents
C O N T E N T 1.0 General overview ............3 2.0 Specifications..............5 3./a Front Panel..............6 3./b Rear Panel ..............8 4.0 Installation..............9 5.0 Troubleshooting ............10 6.0 Drawings..............12... -
Page 3: General Overview
ATTENTION! Please read this manual carefully before operating the equipment! The Linear Amplifier is easy to use, and damages can be avoided by following the instructions stated below. Incorrect use may cause the loss of warranty. 1.0 G E N E R A L O V E R W I E W The Linear Amplifier is produced by M+E Mechanics &... - Page 4 Protection circuits (Ia, Ig1, temp, SWR>3) Temperature dependent ventilating speed control Cooling fans (2 pcs) Function and status indicator LEDs (6 pcs) 1.8KVA transformer 3-way PIC controlled sequencer 4 LED bargraph on new front page version (PWR out, VSWR, Ig, Ia)
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Page 5: Specifications
2.0 S P E C I F I C A T I O N S ME750-FD 4/6m DUOBANDER Frequency coverage 50-52 MHz, 70-72MHz switchable Operating modes ALL mode Output Power 1000 W pep on both bands, common outp Driving Power 0-50W max. -
Page 6: Front Panel
3/a FRONT PANEL 1. POWER ON Main switch of the equipment. 2. ON LED The LED indicator glows when the Linear is switched on. Doesn’t lit in case the 15V DC – supply for the protection circuits and antenna switch - is missing 3. - Page 7 12. Ip/Ua BARGRAPH Indicate the Ia current. When you push the HV pushbutton indicate the Ua voltage in KV. 13. Plate and Load knobs Tuning knobs of the anode and antenna side capacitor. Used for tuning the PA for max output. The position of the capacitors is different on 4m an 6m! 14.
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Page 8: Rear Panel
3/b REAR PANEL 1. 230V Power cord fit for standard 230V-50/60Hz mains. The colour of the protective earth is green/yellow. 2. FUSE1-2 Main fuses, 230V max. 10A. 3. FUSE3 HV fuse. 1A. 4. FUSE4 Fuse for the 18V AC. Value range 1.6A. 5. -
Page 9: Installation
4.0 INSTALLATION 4.1 Connect your TCVR’s to the Linear using a short, 50 Ohm coaxial cables.(different 4 and 6m different inputs, 6m in middle position. 4.2 Connect your TCVR ground giving socket or better foot-switch to the PTT RCA socket on the rear panel of the Linear, using a screened cable. -
Page 10: Troubleshooting
5.0 TROUBLESHOOTING Malfunctions are mostly due to improper handling, overload or similar reason. 5.1 Do not use higher input power as stated in the specification. The grid protector circuit will usually safe the power valves, but OVERLOAD alarm will appear regularly. This may happening often in SSB mode, especially in case of old transceivers, when the output power in SSB mode is not adjustable. - Page 11 5.6 ALWAYS THINK - SAFETY THIS LINEAR AMPLIFIER DESCRIBED IN THIS MANUAL CONTAINS VOLTAGE HAZARDOUS TO HUMAN LIFE AND SAFETY WHICH IS CAPABLE OF INFLICTING PERSONAL INJURY. NEVER OPERATE THE AMPLIFIER WITH THE TOP COVER REMOVED AND THE TOP COVER SAFETY SWITCH DEFEATED.