Ramsey Electronics QRP30 Manuel d'instructions

QRP30 • 1 30 METER (10MHz) CW TRANSMITTER Ramsey Electronics Model No. QRP30 THE RAMSEY QRP30 IS AN AMAZING PERFORMER THAT WILL WORK THE

QRP30 • 10

QRP30 • 11 QRP30 PARTS LAYOUT DIAGRAM:

QRP30 • 12 LEARN-AS-YOU-BUILD" TRANSMITTER ASSEMBLY STRATEGY: As you can see in examining the circuit board and components, there is a bit mo

QRP30 • 13  4. Insert and solder J4 (DC power +12 to 14 volts)  5. Insert and solder R1, the 10K tuning potentiometer.  6. Insert and solder S

QRP30 • 14  18. Install R15, 10K ohms (brown-black-orange).  19. Install C13, .01 uf (marked .01 or 103 or 10 nf).  20. Install R14, 10K ohm

QRP30 • 15  28. Install R3, 1 megohm (brown-black-green).  29. Install R4, 10K (brown-black-orange).  30. Install C2, 47 pf.  31. Install

QRP30 • 16 ◊ A valid FCC Amateur Radio License. ◊ Some method of verifying satisfactory RF output. We will give you several of these in detail in t

QRP30 • 17 The buffer stage is now completed and connected to the base of the power amplifier stage, Q3.  46. Install R10, 270 ohms (red-viol

QRP30 • 18 YOUR POWER SUPPLY AND RF OUTPUT POWER : For optimum performance, one or two volts of extra DC supply power can make quite a difference f

QRP30 • 19 flashlight bulb or the type 243 bulb with screw-in body. Both are rated to give normal brilliance at 2.33 volts, drawing 270 milliamps of

QRP30 • 2 RAMSEY TRANSMITTER KITS • FM100B Professional FM Stereo Transmitter • FM25B Synthesized Stereo Transmitter • AM

QRP30 • 20 TRANS-RECEIVE OPERATION: If you plan to use this transmitter with a Ramsey HR-series direct conversion receiver for portable operation,

QRP30 • 21 NOTE ON CHOOSING, ORDERING CRYSTALS: When ordering crystals for Ramsey QRP transmitters, specify 32 picofarad load capacitance, paralle

QRP30 • 22 TROUBLESHOOTING GUIDE: To put it as kindly as possible, the operations of Ramsey QRP transmitters have been field-checked to such an ex

QRP30 • 23 The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved without contacting

QRP30 • 24 30 METER CW TRANSMITTER KIT Quick Reference Page Guide Introduction ...4 Understanding power levels .

QRP30 • 3 QRP30 30 METER CW TRANSMITTER KIT Ramsey Publication No. QRP30 Price $5.00 TABLE OF CONTENTS Introduction to the QRP30 ... 4 U

QRP30 • 4 INTRODUCTION: Most "QRP" transmitters are one-of-a-kind experimental circuits which take some patience and fine-tuning to get c

QRP30 • 5 power! Different from a receiver, you want to see some measurable output power and you especially want to make two-way contacts! If you&

QRP30 • 6 which gets a report of "10 db. over S-9" measured on the receiving station's S-meter. Assume identical dipole antennas at bo

QRP30 • 7 use of some 10db gain antenna such as a beam or quad by either station could move the S7 for .625 watt up to S8, and that a similar antenna

QRP30 • 8 CIRCUIT DESCRIPTION: In brief, Q1 is a crystal oscillator, amplified by buffer stage Q2, which drives Q3 as the RF output amplifier. Q4 is

QRP30 • 9 PARTS SUPPLIED WITH QRP30 TRANSMITTER KIT: CAPACITORS:  2 47 pf capacitor (C2,C6)  1 220 pf capacitor (marked 220 or 221) (