MODEL ROCKET TRACKING AND TELEMETRY TRANSMITTER KIT Ramsey Electronics Model No. MR6 Easily track your rocket using a scanner receiver. Uses SMT (surface mount technology) components for the ultimate in miniaturization and performance. Actual Size of Assembled Kit With Battery • Talk about small - this baby’s MICRO size ! • Get some “hands on” experience with the latest surface mount technology.
RAMSEY TRANSMITTER KITS • FM10A, FM25B FM Stereo Transmitters • TV6 TV Transmitter • AM1, AM25 AM Transmitters RAMSEY RECEIVER KITS • FR1 FM Broadcast Receiver • AR1 Aircraft Band Receiver • SR2 Shortwave Receiver • AA7 Active Antenna RAMSEY HOBBY KITS • SG7 Personal Speed Radar • SS70A Speech Scrambler • BS1 “Bullshooter” Digital Voice Storage Unit • AVS10 Automatic Sequential Video Switcher • WCT20 Cable Wizard Cable Tracer • LABC1 Lead Acid Battery Charger • ECG1 Heart Monitor • VG1 Van deGraff Generator
Ramsey Publication No. MR6 Price $5.00 KIT ASSEMBLY AND INSTRUCTION MANUAL FOR MR6 MODEL ROCKET TRACKING AND TELEMETRY TRANSMITTER TABLE OF CONTENTS Introduction to the MR6................. 4 How it works.................................. 4 SMT soldering instructions............. 5 Parts list ........................................ 7 Parts Layout diagram .................... 8 Schematic diagram ....................... 9 MR6 Assembly instructions......... 10 Hook-up configurations ................
INTRODUCTION Welcome to the latest innovation in electronics technology using (S)urface (M)ount (T)echnology, or SMT. Just as when the transistor revolutionized the amount of space required to construct electronic circuits, the advent of surface mount components have further “shrunk” the dimensions of what we are accustomed to seeing in modern day circuits. These “chip” components are commonly used in today’s miniature circuits including everything from camcorders to high speed computers.
RAMSEY Learn-As-You-Build KIT ASSEMBLY There are numerous solder connections on the MR6 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 25-50 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.
the solder (see the associated diagrams). Another commonly used technique is to glue the surface mount components to the printed circuit board before soldering. The procedure is to take a small amount of glue (usually with a pin or toothpick) and “dab” the circuit board in the place where the component will be affixed. Be careful not to apply too much glue as when the part is placed it may “squash” the glue underneath the soldering tabs of the component.
MR6 PARTS LIST Note the extra chip components included. RESISTORS ❒ ❒ ❒ 4 3 7 1K ohm chip resistors (R2,3,4) 10K ohm chip resistors (R1,7) 100K ohm chip resistor (R5,6,8,9,10) CAPACITORS ❒ ❒ ❒ ❒ ❒ ❒ 7 2 3 3 3 1 5 pF chip capacitors (C7,8,9,11) 22 pF chip capacitor (C12) 100 pF chip capacitor (C3,4) .001 uF chip capacitor (C2,10) .
Top side of MR6 (SMT Side): Bottom side of MR6: MR6 • 8
MR6 • 9
Now, let's get building! First, we’ll install the “normal” parts that mount on the “component “ side of the circuit board with their leads passing through to the “solder” side of the board. This will also help us to get acquainted with the up - down, left - right orientation of the circuit board.
❒ 14. Install Q3, another MMBTH10L NPN surface mount transistor (marked 3E). Once again orient it as shown in the parts placement diagram. ❒ 15. Install R8, 100K ohm chip resistor. This completes the frequency multiplier portion of the MR6. We’re actually working our way backwards through the transmitter, from antenna to the oscillator input. Take a break now to carefully examine all solder connections, especially around the transistors.
CONGRATULATIONS You have just completed your MR6 model rocket tracking unit. Take a well deserved break now. Give your eyes a rest. When you return, be sure to check over your work on the entire circuit board. Energizing the circuit board with solder “bridges” or misplaced components can damage your kit. MR6 SET-UP AND TESTING INSTRUCTIONS ❒ 1. Tune a scanner, two meter ham rig or other such receiver to 144 MHz. ❒ 2.
DATA INPUT IDEAS: The easiest way to use your MR6 is to tune your 2 meter scanner or receiver until you hit the “dead spot” indicating that it is receiving the carrier from your kit. Turning the MR6 off will confirm that you’re on the right frequency. You may want to get a little more creative with your MR6 and have something to listen for other than quieting. The following are a few ideas that you may want to try using a simple 555 timer circuit.
with R3 to the junction with the battery positive point. Because the resistance of the photocell changes according to how much light is present, this will cause the audio tone to change as well. In the same way you can try placing a thermistor either across R4 or in place of it (depending on the value of the thermistor). Thermistors are devices whose resistance changes depending on temperature. Be creative! Experiment! That’s what Ramsey kits are all about.
The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved without contacting the factory. Notice that this is not a "fine print" warranty. We want you to understand your rights and ours too! All Ramsey kits will work if assembled properly. The very fact that your kit includes this new manual is your assurance that a team of knowledgeable people have field-tested several "copies" of this kit straight from the Ramsey Inventory.
MODEL ROCKET TRACKING TRANSMITTER Quick Reference Page Guide Introduction to the MR6 ................. 4 How it works .................................. 4 SMT soldering instructions .............5 Parts list ......................................... 7 Parts Layout diagram..................... 8 Schematic diagram ........................ 9 MR6 Assembly instructions ......... 10 Hook-up configurations .................13 Troubleshooting ............................13 Ramsey kit warranty .....................
