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SETTING UP THE SC1 FOR A HOME STEREO SYSTEM: 

   

1. Make sure the stereo AM-FM receiver has provisions for attaching  an 

external AM antenna. Sometimes, the built-in antenna wires  are 
detachable from the rear-panel antenna terminals. 

2. Prepare a short coaxial cable with suitable connectors or wire ends to 

make a neat connection between the SC1 and the receiver AM antenna 
terminals. 

3. Provide a 9 to 12 volt battery power supply. A 9-volt battery snap  

connector is easily wired in parallel with the 12-volt connector on  the PC 
board. 

4. Connect a suitable shortwave receiving antenna to the SC1  antenna 

jack. 10 to 20 feet of hookup wire will do fine.    

   

SETTING UP THE SC1 FOR AUTOMOBILE USE:

    

 
The 12-volt DC power connection for the SC1 is accomplished most easily 
by the use of the Ramsey CLG-1 cigarette lighter cord or a similar cord from 
Radio Shack. You may also make a permanent installation using the 
appropriate coaxial style DC power plug to the SC1 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, you may have to install a noise filter on your alternator, or 
suitable resistor-type spark plug wires. A competent mobile CB radio shop or 
technician can be helpful in such cases. Radio Shack carries a variety of 
noise filters and eliminators.    
 
The most common auto radio antenna connector is the Motorola style plug. 
The cheapest and neatest antenna hookup for the SC1 is made from a male-
to-female in-line extension cable. Radio Shack No. 12-1312 is a 24" length 
with a plug at one end and an insulated jack at the other. Cut the cable in 
half and solder RCA-type plugs to the two cut ends, using correct coax cable 
preparation and soldering techniques. The new cable with the male Motorola 
plug connects between the car radio and the SC1 receiver jack. The other 
short cable permits a neat connection of the car radio antenna to the SC1 
antenna jack. Before buying or cutting any cables, however, study your car 
radio installation and how you will locate the SC1. 
 

Содержание SC1

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 17: ...SC 1 17...

Страница 18: ...SC 1 18...

Страница 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...

Страница 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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