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SC-1 

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RAMSEY TRANSMITTER KITS 
       

• 

FM100B Professional FM Stereo Transmitter 

       

• 

FM25B Synthesized Stereo Transmitter 

       

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AM1, AM25 AM Transmitters 

       

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TV6 Television Transmitter 

 
RAMSEY RECEIVER KITS 
       

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FR1 FM Broadcast Receiver 

       

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AR1 Aircraft Band Receiver 

       

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SR2 Shortwave Receiver 

       

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AA7 Active Antenna 

       

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SC1 Shortwave Converter 

 
RAMSEY HOBBY KITS 
       

• 

SG7 Personal Speed Radar 

       

• 

SS70A Speech Scrambler 

       

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SP1 Speakerphone 

       

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WCT20 Wizard Cable Tracer 

       

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PH10 Peak hold Meter 

       

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LC1 Inductance-Capacitance Meter 

 
RAMSEY AMATEUR RADIO KITS 
       

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DDF1 Doppler Direction Finder 

       

• 

HR Series HF All Mode Receivers 

       

• 

QRP Series HF CW Transmitters 

       

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CW7 CW Keyer 

       

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CPO3 Code Practice Oscillator 

       

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QRP Power Amplifiers 

 
RAMSEY MINI-KITS 
Many other kits are available for hobby, school, Scouts and just plain FUN. New 
kits are always under development. Write or call for our free Ramsey catalog.    

 

SC1 SHORTWAVE CONVERTER KIT INSTRUCTION MANUAL  

Ramsey Electronics publication NO. MSC1  Rev. 1.3a 

First printing: July 1992

 

 
COPYRIGHT  1993 by Ramsey Electronics, Inc. 590 Fishers Station Drive, Victor, New York 
14564. All rights reserved. No portion of this publication may be copied or duplicated without the 
written permission of Ramsey Electronics, Inc. Printed in the United States of America.

 

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...

Page 17: ...SC 1 17...

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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