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SC-1 

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Shortwave Converter Kit 
Quick Reference Page Guide 

 
Introduction to the SC1 ...........................4  
What you can expect to hear ..................5  
Parts list ..................................................6  
SC1 Parts layout .....................................7  
SC1 Circuit description ............................8  
SC1 Assembly instructions .....................9 
Adjusting your listening bands ................13 
Understanding what you're tuning ...........15  
Schematic diagram .................................18    
Ramsey Warranty ...................................19   

Price: $5.00 
Ramsey Publication No. SC1 
Assembly and Instruction manual for: 

RAMSEY MODEL NO. SC1

  

SHORTWAVE CONVERTER 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’s Tool Kit  TK405 
 

ADDITIONAL SUGGESTED ITEMS

 

Holder for PC Board/Parts  Ramsey HH3  

Desoldering Braid  Ramsey RTS08  

Digital Multimeter  Ramsey M133 

TOTAL SOLDER POINTS 

102 

ESTIMATED ASSEMBLY 

TIME 

Beginner ............... 3.0 hrs 
Intermediate ......... 1.7  hrs 
Advanced ............. 1.3  hrs 

Summary of Contents for SC1

Page 1: ...h any AM radio car radios are ideal Tune from your regular radio dial easily set station presets etc on your existing radio Operates on 9 to 15 volts Listen to worldwide broadcasts in your car boat or...

Page 2: ...er 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 hob...

Page 3: ...to the SC1 4 What you can expect to hear 5 Parts list 6 SC1 Parts layout 7 SC1 Circuit description 8 SC1 Assembly instructions 9 Setting up the SC1 12 Setting your listening bands 13 Understanding wha...

Page 4: ...g receiver Virtually any receiver can be converted to receive other bands in this manner The receiver functions as a tuneable IF and its good circuit qualities carry over to the newly received frequen...

Page 5: ...dulation You will also hear a variety of other interesting sounds but just remember that this receiving set up is designed for listening to AM style broadcast formats Morse code CW or teletype signals...

Page 6: ...marked 42IF123 L1 1 Shielded coil marked 42EB L2 3 3 9 uH inductor green body with a large silver band followed by orange gold white silver bands L3 L4 L5 RESISTORS 2 470 ohms yellow violet brown R4...

Page 7: ...SC 1 7 RAMSEY SC1 PARTS LAYOUT...

Page 8: ...nge of the AM radio For example to receive 10 MHz WWV the radio dial is set to 1000 KHz and the SC 1 oscillator is set to 9 MHz Another way of viewing it is that if the oscillator is set to 9 MHz the...

Page 9: ...the schematic circuit diagram from time to time Enough talk let s get building 1 Install J3 the DC power jack 2 Install J1 the antenna or RF input jack 3 Install S1 the first of two DPDT push style sw...

Page 10: ...20 Install transistor Q1 2N3904 Observe correct position of the flat side 21 Install C13 4 7 or 10 uF the ONLY electrolytic or polarized capacitor in the SC1 kit Electrolytic capacitors have a right...

Page 11: ...ion before installation There is a small tubular capacitor visible in the plastic bottom of the coil that needs to be removed which is done by crushing it with the tip of a small screwdriver or the po...

Page 12: ...and hard wiring into the car s fuse block Some automobile ignition systems cause noise which needs to be suppressed for satisfactory operation of ANY radio device When using this converter in a car y...

Page 13: ...n how to set up L1 and L2 for your choice of two 1 MHz SW bands selected by S2 tuned by the AM radio If you aren t familiar with shortwave broadcast band frequency allocations but have and know how to...

Page 14: ...dio TV Feed Service Master programming source for the U S military radio hear CBS NBC ABC Mutual news on all the same channel plus many other features and spots which give a feel for how it s going wi...

Page 15: ...IO HAMS AND EXPERIMENTERS The SC1 Shortwave Converter can be a fun platform for putting an extra AM radio set to work for listening to your favorite band Brand new AM only car radios pulled from new v...

Page 16: ...s that includes a nifty Stereo FM Transmitter You can transmit your favorite music or radio calls throughout the house and yard with this low cost kit Another handy kit is our Speakerphone kit that al...

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Page 18: ...SC 1 18...

Page 19: ...tty much 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...

Page 20: ...Ramsey Publication No SC1 Assembly and Instruction manual for RAMSEY MODEL NO SC1 SHORTWAVE CONVERTER KIT REQUIRED TOOLS Soldering Iron Ramsey WLC100 Thin Rosin Core Solder Ramsey RTS12 Needle Nose Pl...

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