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AM1 

 8

  

ASSEMBLY INSTRUCTIONS 

 
There are numerous solder connections on the AM1 printed circuit board. 
Therefore, PLEASE take us seriously when we say that good soldering is 
essential to the proper operation of your transmitter! 
 

Use a 25-watt soldering pencil with a clean, sharp tip. 

Use only rosin-core solder intended for electronics use. 

Use bright lighting, a magnifying lamp or bench-style magnifier may 
be helpful. 

Do your work in stages, taking breaks to check your work. Carefully 
brush away wire cuttings so they don't lodge between solder 
connections. 

 
We have a two-fold "strategy" for the order of the following kit assembly 
steps. First, we install parts in physical relationship to each other, so there's 
minimal chance of inserting wires into wrong holes. Second, whenever 
possible, we install in an order that fits our "Learn-As-You Build" Kit building 
philosophy. This entails describing the circuit that you are building, instead of 
just blindly installing components. We hope that this will not only make 
assembly of our kits easier, but help you to understand the circuit you’re 
constructing. 
  
For each part, our word "Install" always means these steps: 
 
              1. Pick the correct part value to start with. 
 
              2. Insert the part, oriented correctly, into its correct holes in the PC-
              board.  
 

       2. If helpful, gently BEND the part's wire leads or tabs to hold it into 
       place, with the body of the part snugly against the top side
       ("component side") of  the PC-board.  The top side is the              
       side that does not contain metal traces, but does have an            
       outline of each part printed on it. 

 
              3. Insert it into the correct PC board location. 
 
              4. Orient it correctly, follow the PC board drawing and the written 
              directions for all parts - especially when there's a right way           
              and a wrong way to solder it in. (Diode bands, electrolytic             
              capacitor polarity, transistor shapes, dotted or notched ends        
              of IC's, and so forth.) 
 

Содержание AM1

Страница 1: ...owerful enough for high school college or neighborhood radio station in use the world over Easily tunes to any clear channel on the AM broadcast band from 530 to 1750 KHz Operates on the same principl...

Страница 2: ...MATEUR RADIO KITS FX 146 VHF Transceiver 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...

Страница 3: ...am 6 Parts Layout Diagram 7 Parts List 8 Assembly Instructions 9 Antenna Considerations 13 Alignment Procedures 14 Experimental Broadcasting 14 Troubleshooting 15 FCC Information 16 Antenna Experiment...

Страница 4: ...d for auditoriums churches or other events Short range experimentation We think that you will be very pleased with the transmitting range audio quality and frequency stability of this build it yoursel...

Страница 5: ...d L3 Notice also that the audio information is applied at the power amplifier stage This is referred to as high level modulation and is commonly used for high power AM broadcast stations The distinct...

Страница 6: ...AM1 6 PARTS LAYOUT DIAGRAM...

Страница 7: ...9 10 16 4 002 or 0022 F disc capacitor marked 002 0022 or 2000 2200 C13 14 see text C9 10 16 7 01 F disc capacitor marked 01 or 103 or 10nF C3 5 6 7 8 11 12 3 10 F electrolytic capacitors C1 2 4 1 220...

Страница 8: ...ou Build Kit building philosophy This entails describing the circuit that you are building instead of just blindly installing components We hope that this will not only make assembly of our kits easie...

Страница 9: ...ix connections 2 Install RCA phono jacks J1 and J2 These connectors will snap into place before soldering Don t be afraid to completely solder all three ground connections as these will also limit the...

Страница 10: ...solder connections Resolder any connections that are less than perfect We ll get back to building now starting at the audio input and working through the audio circuitry 15 Install trimmer potentiomet...

Страница 11: ...eed to make some decisions on how we are going to use our AM transmitter Follow the following final assembly instructions carefully AM1 Final Assembly Instructions If you wish to use a microphone as t...

Страница 12: ...re antenna connected to the center pin of the RF OUT connector will produce satisfactory results Another simple but effective hint is to connect the chassis ground to a good earth ground like a cold w...

Страница 13: ...r testing if you ve configured the AM1 for line level is the line level outputs of a tape deck or CD player Most stereo systems have a variety of output jacks of which one or more are line level Conne...

Страница 14: ...sembly steps going backwards from the last steps to the the first Bright lighting and a magnifying aid can be helpful in identifying soldering problems Use a methodical logical troubleshooting techniq...

Страница 15: ...it is your responsibility to study the FCC regulations It is best if you personally read the rules and consult with a lawyer if you re in doubt and not bother understaffed and busy FCC employees with...

Страница 16: ...on behalf of a school scout or community group ANTENNA EXPERIMENTING Since one wavelength at AM broadcast frequencies is over 950 feet and the distance of only ten feet is allowed between the transmi...

Страница 17: ...ks best for you CONCLUSION We sincerely hope that you have enjoyed the construction and use of this Ramsey Kit As always we have tried to compose our manual in the easiest most user friendly format th...

Страница 18: ...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 be...

Страница 19: ...8 Holder for PC Board Parts RS64 2094 Desoldering Braid RS 2090 TOTAL SOLDER POINTS 99 ESTIMATED ASSEMBLY TIME Beginner 3 hrs Intermediate 1 5 hrs Advanced 1 hr RAMSEY ELECTRONICS INC 793 Canning Park...

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