Ramsey Electronics QRP CW POWER AMPLIFIER KIT QAMP30 Manual de instrucciones Pagina 1

QAMP-30 • 1 Ramsey Electronics Model No. QAMP30 Need a little extra boost for your QRP rig? Believe it or not, 20 watts is only about an ‘S’ unit

QAMP-30 • 10 We're almost finished. All we need to do now is install a few remaining parts that have to be handmade - for that "old-world c

QAMP-30 • 11 amount of wire cut for this task is the proper amount. If you have too little or too much, then you have not wound the core correctly. T

QAMP-30 • 12  47. Locate the smaller transformer (T2) and install it snugly on the PC board.  48. Install the larger transformer (T1) into the in

QAMP-30 • 13  3. Connect a dummy load to J1, the amplifier RF output. In a pinch, a light bulb may be used - see the section, "Verifying RF

QAMP-30 • 14 VERIFYING TRANSMITTER RF OUTPUT The most important thing to know is whether your transmitter is delivering some measurable and reassuri

QAMP-30 • 15 Amateur radio magazines and handbooks provide a variety of circuits for RF wattmeters and relative field-strength indicators, including m

QAMP-30 • 16 If you hear an AC hum on the transmitted signal, usual causes are RF getting back into the power supply or a bad VSWR on the antenna. T

QAMP-30 • 17 While we believe that the Ramsey enclosure and knob option is a fine value for finishing off your Ramsey kit, we are happy to give you a

QAMP-30 • 18

QAMP-30 • 19 Amateur radio magazines and handbooks provide a variety of circuits for RF wattmeters and relative field-strength indicators, including

QAMP-30 • 2 RAMSEY TRANSMITTER KITS • FM100B Professional FM Stereo Transmitter • FM25B Synthesized Stereo FM Transmitter

QAMP-30 • 20 QAMP30 20 WATT LINEAR AMPLIFIER Quick Reference Page Guide Introduction to the QAMP-30 ...4 How it works ...

QAMP-30 • 3 Ramsey Publication No. MQAMP30 Price $5.00 TABLE OF CONTENTS Introduction to the QAMP30 .

QAMP-30 • 4 INTRODUCTION The Ramsey QAMP series of QRP power amplifiers are compact 10 to 20 watt RF amplifiers for QRP CW transmitters. These amp

QAMP-30 • 5 PARTS LIST FOR THE QAMP30 QRP POWER AMPLIFIER CAPACITORS:  1 100 to 220 µf electrolytic capacitor [C1]  1 10 µf electr

QAMP-30 • 6 "THE RAMSEY LEARN-AS-YOU-BUILD ASSEMBLY STRATEGY" Take a look at the parts layout diagram. There is quite a lot to the constru

QAMP-30 • 7 • If helpful, gently bend the part’s wire leads or tabs to hold it in place, with the body of the part snugly against the top side (compon

QAMP-30 • 8  16. Install diode D4, 1N4002 style black epoxy diode. Check positioning of the banded end.  17. Install jumper JMP2. Use a piece o

QAMP-30 • 9 These last four parts (R8,9 and C11,12) form parasitic suppression networks across each transistor to suppress any tendency for high frequ