Ramsey Electronics SM3 Quick Start Manual Download Page 10

RAMSEY TRANSMITTER KITS 
        

• 

FM10A FM Stereo Transmitter 

        

• 

TV6 Television Transmitter 

RAMSEY RECEIVER KITS 
        

• 

FR1 FM Broadcast Receiver 

        

• 

AR1 Aircraft Band Receiver 

        

• 

SR2 Shortwave Receiver 

        

• 

AA7 Active Antenna 

        

• 

SC1 Shortwave Converter 

RAMSEY HOBBY KITS 
        

• 

SG7 Personal Speed Radar 

        

• 

SS70A Speech Scrambler 

        

• 

SP1 Speakerphone 

        

• 

MD3 Microwave Motion Detector 

        

• 

PH14 Peak Hold Meter 

        

• 

TG1 DTMF Tone Grabber 

RAMSEY AMATEUR RADIO KITS 
        

• 

DDF1 Doppler 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, school, Scouts 
and just plain FUN. New kits are always under 
development. Write or call for our free Ramsey catalog.  

 

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 

 

 

 

 

 

 

Call or write for our 

full line catalog! 

TOTAL SOLDER POINTS 

21 

ESTIMATED ASSEMBLY 

TIME 

Beginner ...............0.6  hrs 
Intermediate .........0.4  hrs 
Advanced .............0.3 hrs 

Summary of Contents for SM3

Page 1: ...es any speaker Two volume levels 250 mW and 5 Watts Easy to build two transistor circuit teaches too Kids love it Duplicates the upward and downward wail of a police siren Great for alarms kids toys b...

Page 2: ...d plenty of uses for the SM3 Kids love to play fire truck or ambulance on their bikes and wagons Mom will appreciate the low volume setting here and there are the obvious uses for alarms and alerting...

Page 3: ...our step by step directions and you ll be wailing real soon When we say to install a part we mean Carefully select the right part and insert it in the PC board Gently press it fully down to the board...

Page 4: ...the hole 3 Install R2 47K yellow violet orange 4 Install C1 01 or 02 uF The holes for C2 are spaced far apart you ll see why later so just stretch C1 s leads to fit 5 Install R1 47K yellow violet oran...

Page 5: ...volt battery will suffice for now Pushbutton switch A doorbell button works well but simply touching two wires together will do 1 Connect up the speaker to points 1 and 2 2 Connect your pushbutton or...

Page 6: ...1 5K brown green red as shown YELPING SIREN To make your siren sound like the yelping type and get a tired pushbutton finger too change C2 from 47 uF to a smaller value such as 5 or 10 uF Experiment...

Page 7: ...OUCHES Your siren can be easily mounted in most any handy box or enclosure A coffee or juice can makes a dandy enclosure for speaker battery siren and pushbutton Use your imagination and see how much...

Page 8: ...SM3 8...

Page 9: ...part you need and proof of kit purchase 3 FACTORY REPAIR OF ASSEMBLED KITS To qualify for Ramsey Electronics factory repair kits MUST 1 NOT be assembled with acid core solder or flux 2 NOT be modifie...

Page 10: ...s CW7 CW Keyer CPO3 Code Practice Oscillator 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...

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