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TREASURE
FINDER
METAL DETECTOR KIT
Ramsey Electronics Model No.
Ahoy mates ! Go searching for buried treasure in your own
backyard, nearby park, or on the beach. This professional
quality unit can find metal at a depth of six inches!
Talk about your ideal project, this one will literally "pay for itself"
finding hidden treasures!
•
Sensitive...you bet ! Uses a Faraday shielded search coil just like
the pro's !
•
Runs on 9-12 volts DC ; internal power regulation for "rock solid"
performance.
•
E-Z grip handle for comfortable use.
•
"Breaks down" small enough to fit in a suitcase or backpack ...
ideal for trips or hikes.
•
Utilizes the Signetics® NE 602 mixer / oscillator integrated circuit
for worry free operation.
•
Convenient earphone output for earphone / headset operation....
volume limited to protect your eardrums!
•
Complete and informative instructions guide you to a kit that works
the first time, every time - enhances resale value, too !
TF1 • 1
TF-1
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Summary of Contents for Ramsey Electronics Treasure finder TF-1
- Page 1 TREASURE FINDER METAL DETECTOR KIT Ramsey Electronics Model No. TF-1 Ahoy mates ! Go searching for buried treasure in your own backyard, nearby park, or on the beach. This professional quality unit can find metal at a depth of six inches! Talk about your ideal project, this one will literally “pay for itself”...
- Page 2 1998 by Ramsey Electronics, Inc. 793 Canning Parkway, 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. TF1 • 2...
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Page 3: Table Of Contents
Price $5.00 INSTRUCTION MANUAL FOR TREASURE FINDER METAL DETECTOR TABLE OF CONTENTS Introduction to the TF-1 ....4 TF-1 Circuit Description ....4 TF-1 Assembly Steps ..... 8 Schematic diagram ...... 12 Component Layout ....... 13 Initial Testing ........ 21 Troubleshooting ...... -
Page 4: Circuit Description
“professional” units selling for five to ten times more. Enter the Ramsey TF-1 treasure finder metal detector unit. Using today's superior integrated circuit technology and a little physics know-how, we’ve come up with a great circuit that performs admirably with a minimum of tuning. - Page 5 So this oscillation is generating a “pulsating” magnetic wave. This magnetic wave expands and contracts around the coil. When this magnetic “wave” comes in contact with a metal object it induces a small voltage at either end of the metallic “target”. With this induced voltage across the target object, a small current begins to flow causing a “counter”...
- Page 6 (R10) in series with the headphone output. TF-1 COMPONENTS LIST Sort and “check off” the components in the boxes provided. It’s also helpful to sort the parts into separate containers (egg cartons do nicely) to avoid confusion while assembling the kit.
- Page 7 #6 type B self tapping screws RAMSEY LEARN-AS-YOU-BUILD KIT ASSEMBLY There are numerous solder connections on the TF-1 printed circuit board. Therefore, PLEASE take us seriously when we say that good soldering is essential to the proper operation of your metal detector!
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Page 8: Assembly Steps
These will be used to form wire jumpers (JMP1, etc.) to be soldered in just like parts during these construction steps. Enough of that ... lets get started! TF-1 METAL DETECTOR ASSEMBLY STEPS Although we know that you are anxious to complete the assembly of your TF1 • 8... - Page 9 treasure finder kit, it is best to follow the step by step instructions. Try to avoid the urge to “jump ahead” installing components. Since you may appreciate some “warm-up” soldering practice as well as a chance to put some “landmarks” on the PC board, we’ll first install some of the larger mounting components.
- Page 10 “jumper” connection wires later. Resistors are not polarized, they may mount in either direction. 7. Install LED D1. Being a diode, this component is polarized and must be oriented correctly. Examine the LED and notice how one lead is longer than the other. The longer of the two leads is the anode, or (+) connection.
- Page 11 18. Install C18, a .01 uF mylar capacitor (marked 103). We chose to use a mylar cap in this position because mylar caps show greater stability than standard ceramic disc caps; and since this is used in the oscillator frequency determining section we wish to keep this value as “rock solid” as possible.
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Page 12: Component Layout
TF-1 COMPONENT LAYOUT TF1 • 12... - Page 13 31. Identify C1, the 10 uF electrolytic capacitor. Electrolytic capacitors are polarized with a (+) and (-) lead and must be installed in the correct orientation. Ordinarily, only the negative side is marked on the capacitor body with a dark band and the (-) sign clearly shown, while the PC boards will usually show the (+) hole location.
- Page 14 43. Install C14, .1uF disc capacitor (marked .1 or 104). 44. Install R10, 120 ohm (brown-red-brown). 45. Install the 9V battery connector to the “RED” and “BLK” holes, respectively. 46. Install the 9V battery clip using a scrap component lead to hold it on the PC board.
- Page 15 forming our treasure finder! 2. Fit together the pre drilled sections of PVC tubing as shown. DO NOT GLUE THE PVC TOGETHER AT THIS TIME. This is L O O P S H IE L D our first fitting and we want to be sure everything is just right before 2 2 "...
- Page 16 3. With the PVC pushed together, slip the mini coaxial cable through the coil wire hole, as shown, and feed the wire through until it falls through the coil mounting slot. Be sure to leave yourself at least 6 inches of extra wire at each opening for final assembly.
- Page 17 LOOP SHIELD VIEWED FROM ABOVE FLATTEN ENDS OF SEARCH COIL TUBING enameled wire with solder for easy connections later. Well you’ve almost made it to the completion of your treasure finder. Just a few more steps and you will be beachcombing! 7.
- Page 18 insulation may overheat and cause a short in the cable. Once your soldering is complete you may slide the crimped ends of the coil into the slots cut in the PVC tubing and insert the PVC endcap supplied with your kit. 9.
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Page 19: Initial Testing
CONGRATULATIONS Your treasure finder is now complete! Have a final look over your work, paying particular attention to the orientation of diodes, transistors and IC’s. INITIAL TESTING OF THE METAL DETECTOR This kit was purposefully designed to “plug and play” with minimal testing upon completion. -
Page 20: Troubleshooting
TROUBLESHOOTING INSTRUCTIONS While we had hoped that it wouldn’t come to this, if you are having trouble with your treasure finder here are a few suggestions. Use a methodical, logical troubleshooting technique. Most problems can be solved using common sense. A volt-ohm meter and a clear head are usually all that are needed to correct any problem. - Page 21 As our customers, we value your opinions, comments, and additions that you would like to see in future publications. Please submit comments or ideas to: Ramsey Electronics Inc. Attn. Hobby Kit Department 793 Canning Parkway...
- Page 22 '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.
- Page 23 Treasure Finder Metal Detector Quick Reference Page Guide Introduction to the TF-1 ....4 TF-1 Circuit Description ....4 TF-1 Assembly Steps ....8 Schematic diagram ...... 12 Component Layout ...... 13 Initial Testing ........ 21 Ramsey warranty ......23...