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QRP30 

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30 METER   (10MHz) 
CW TRANSMITTER 

Ramsey Electronics Model No.           QRP30 

THE RAMSEY QRP30 IS AN AMAZING PERFORMER 
THAT WILL WORK THE WORLD ON ABOUT A WATT! 
FOLKS OF ALL AGES HAVE SUCCESSFULLY BUILT  
AND ENJOYED THIS EASY,  FUN KIT. 

Ideal for portable or travel fun 

VCXO design allows up to 5 - 8 KHz of tuning about the crystal 
frequency 

Front panel switching of TWO channels and includes a crystal for 
10.108 MHz, the International QRP frequency  

Excellent and clean keying waveform 

Built-in antenna T-R switch 

Operates on 12 - 15 volts DC at 1/4 amp current 

Appoximately 1 Watt RF power 

Clear, concise step-by-step instructions carefully guide you to a 
finished kit that not only works - but you’ll also learn too! 

Proven design that has won many of awards for operators around 
the country! 

Add our case and knob set for a finished ‘Pro’ look. Cases match all 
Ramsey products 

Summary of Contents for QRP30

Page 1: ...Front panel switching of TWO channels and includes a crystal for 10 108 MHz the International QRP frequency Excellent and clean keying waveform Built in antenna T R switch Operates on 12 15 volts DC...

Page 2: ...Direction Finder HR Series HF All Mode Receivers QRP Series HF CW Transmitters CW7 CW Keyer CPO3 Code Practice Oscillator QRP Power Amplifiers RAMSEY MINI KITS Many other kits are available for hobby...

Page 3: ...0 Parts layout diagram 11 Assembly instructions 12 Crystal oscillator testing 16 Initial tests 17 Verifying RF power 18 Maximizing RF power output 19 Options for finishing project 20 Enclosure ideas 2...

Page 4: ...reducing power output can be the switching off of a linear power amplifier or switching from 25 to 5 watts on your new Radio Shack 10 meter rig or turning back the carrier level control on most moder...

Page 5: ...oretical facts we should know 1 An S unit on a receiver s S meter or in the R S T system consists of a 6 decibel increase or decrease of output power received from a transmitter 2 Power needs to be in...

Page 6: ...gnal reports of 20 over S 9 and more can be given without even needing 1000 watts or a beam antenna Assuming the 20 is an accurate report consider this example of power reduction over the same path S9...

Page 7: ...amsey transmitter especially challenging since they prefer the new world of milliwatt operation known as QRPp And yes the ones who have conquered the milliwatt world ARE setting records with milliwatt...

Page 8: ...orm a low pass filter Butterworth to match the output of Q3 to the antenna and reduce harmonics to acceptable levels as specified by the FCC When the keying line is closed Q4 conducts 12VDC to the osc...

Page 9: ...R10 1 470 ohms yellow violet brown R6 2 1K ohms brown black red R12 13 4 10K ohms brown black orange R4 5 14 15 1 47K ohms yellow violet orange R8 2 1 megohm brown black green R2 3 1 10K potentiomete...

Page 10: ...QRP30 10...

Page 11: ...QRP30 11 QRP30 PARTS LAYOUT DIAGRAM...

Page 12: ...mitter has also developed some familiarity with general electronics practices and language Therefore you can expect the following procedures to move along with less of the hand holding which we offer...

Page 13: ...transmission and permits the antenna to be connected to the receiver jack during key up conditions To further complete this section of the circuit we now install the first of three 100 uh RF chokes Th...

Page 14: ...r comes complete with one crystal in the CW range usually the suggested QRP international calling frequency S1 permits your choice of any two installed crystals the one that comes with your kit and an...

Page 15: ...er before your Ramsey transmitter is ready for testing and on the air operation It is common for experimental projects to give disappointing results because of inefficient haywire hookups as soon as t...

Page 16: ...ings the frequency down a fact to remember if you order additional crystals NOTE TO NEWCOMERS Please be aware that even this one transistor oscillator is itself a transmitting device quite capable in...

Page 17: ...the time to make proper preparations for testing and using your transmitter As we suggest in all Ramsey Electronics kit projects now might also be an excellent time to take a break and then come back...

Page 18: ...the antenna line capable of accurately measuring low output power in watts and even milliwatts And it cost you less than what you paid for the transmitter kit Right If not we have a few other ideas f...

Page 19: ...ttmeter capable of showing 1 10 watt differences in RF power MAXIMIZING RF POWER OUTPUT Hopefully the introductory discussion about the amount of power increase needed for significant boosts in RST re...

Page 20: ...the inexpensive and attractive Ramsey case and knob set will give your unit that nice finished look and increase its resale value These sturdy black instrument cases are supplied with printed overlaye...

Page 21: ...positions 1 A resonant antenna dipole or quarter wave vertical 2 Good quality coaxial feedline and connectors 3 An effective earth ground We cannot expect good results from low levels of RF output if...

Page 22: ...ALL assembly steps and the quality of all solder connections In addition check those too obvious things we like to take for granted cables and connectors polarity of the DC supply If the oscillator s...

Page 23: ...be assured that the 1K ohm resistors are actually the missing 10 K parts Hum m m I guess the red band really does look orange Ramsey Electronics project kits are packed with pride in the USA If you b...

Page 24: ...30 30 METER CW TRANSMITTER KIT REQUIRED TOOLS Soldering Iron Ramsey WLC100 Thin Rosin Core Solder Ramsey RTS12 Needle Nose Pliers Ramsey MPP4 or RTS05 Small Diagonal Cutters Ramsey RTS04 OR Technician...

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