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MODEL ROCKET TRACKING
AND TELEMETRY
TRANSMITTER KIT
Ramsey Electronics Model No.
Easily track your rocket using a scanner receiver. Uses
SMT (surface mount technology) components for the
ultimate in miniaturization and performance.
•
Talk about small - this baby's MICRO size !
•
Get some "hands on" experience with the latest surface mount
technology.
•
Crystal controlled - NO FREQUENCY DRIFT !
•
Not small on performance - transmits up to 1/4 mile !
•
Kit includes extra SMT components - no worries about losing or
dropping a tiny part.
•
Unit powered by a 3 V lithium camera battery (included) available at
any camera or discount store.
•
Complete and informative instructions guide you to a kit that works
the first time, every time - enhances resale value, too !
•
Transmits in the 146.00 MHz range, receive on any scanner or 2
Meter ham rig
Actual Size of
Assembled Kit
With Battery
MR6 • 1
MR6
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Summary of Contents for Ramsey Electronics MR6
- Page 1 MODEL ROCKET TRACKING AND TELEMETRY TRANSMITTER KIT Ramsey Electronics Model No. 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 •...
- Page 2 1995 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. MR6 • 2...
- Page 3 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 ..
- Page 4 A magnifying lens is recommended to check solder connections. MR6 CIRCUIT DESCRIPTION The MR6 is a three stage crystal controlled transmitter consisting of a crystal oscillator followed by two frequency multipliers. The crystal oscillator operates at 12, 16 or 24 MHz, depending upon crystal used. The first...
- Page 5 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.
- Page 6 Notice also that when reheating the solder that the iron tip does not come in contact with the “tab” on the body of the chip component. Over heat- ing of this solder tab can cause a fracture of the bond to the component, causing an intermittent connection. MR6 • 6...
- Page 7 MR6 PARTS LIST Note the extra chip components included. RESISTORS 1K ohm chip resistors (R2,3,4) 10K ohm chip resistors (R1,7) 100K ohm chip resistor (R5,6,8,9,10) CAPACITORS 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)
- Page 8 Top side of MR6 (SMT Side): Bottom side of MR6: MR6 • 8...
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Page 9: Schematic Diagram
SCHEMATIC DIAGRAM: MR6 • 9... - Page 10 12. Install Q4, the MMBTH10L NPN surface mount transistor (marked 3E). Be sure to orient it as shown in the parts placement diagram. Those sure are small mounting “tabs”, aren't they! 13. Install C7, the last 5 pF chip capacitor. MR6 • 10...
- Page 11 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.
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Page 12: Antenna Considerations
PLEASE READ THIS IMPORTANT INFORMATION The MR6 operates in the 2 meter Amateur radio band and should be used by or under the direction of a properly licensed ham operator. MR6 • 12... - Page 13 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.
- Page 14 Be creative! Experiment! That’s what Ramsey kits are all about. CHANGING YOUR CRYSTAL It is possible to change the frequency of your MR6 kit in two ways. The first is to change the value of C12. Increasing or decreasing the value of C12 will cause the circuit to oscillate at a slightly different frequency.
- Page 15 '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 believe we packed an incorrect part or omitted a part clearly indicated in your assembly manual as supplied with the basic kit by Ramsey, please write or call us with information on the part you need and proof of kit purchase.
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Page 16: Required Tools
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...
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