Instruction manual

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TM100 Page 1

• Broadband design for full FM broadcast band coverage

• 75 ohm cable connections for easy hookup and low cost

• Simple, heavy duty PVC construction for a durable antenna

that will last for years and years

• Designed for use with either transmitters or receivers

• Helps to increase transmission distance by providing a

better radiator than just “hanging wires”

• Reduces hum problems by reducing reflected RF power into

micro-transmitters

• Mountable in either horizontal or vertical position for easy

polarization selection

Here’s the ultimate radio antenna for your micro-power

transmitters and high sensitivity receivers. Maximum power

radiation is assured by proper impedance matching and

computer design. Greatly increases transmission range! Use

what the professionals use, step up to the pump and increase

your coverage!

Ramsey Electronics Model No. TM100

Summary of content (16 pages)

PAGE 1
Ramsey Electronics Model No. TM100 Here’s the ultimate radio antenna for your micro-power transmitters and high sensitivity receivers. Maximum power radiation is assured by proper impedance matching and computer design.
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RAMSEY TRANSMITTER KITS • FM100B Professional FM Stereo Transmitter • FM25B Synthesized Stereo FM Transmitter • MR6 Model Rocket Tracking Transmitter • TV6 Television Transmitter RAMSEY RECEIVER KITS • FR1 FM Broadcast Receiver • AR1 Aircraft Band Receiver • SR2 Shortwave Receiver • SC1 Shortwave Converter 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 • LC1 Ind
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Ramsey Publication No. MTM100 Price $5.00 KIT ASSEMBLY AND INSTRUCTION MANUAL FOR TM100 TRU MATCH FM BAND ANTENNA TABLE OF CONTENTS Introduction .....................................4 How Does It Work? .........................4 Learn As You Build .........................5 Parts List .........................................7 Construction....................................8 Testing ..........................................13 Setup ............................................14 RAMSEY ELECTRONICS, INC.
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INTRODUCTION TO THE TM100 At Ramsey Electronics we are constantly bombarded with questions on how to get the micro power transmitters to go as far as possible without worry about FCC rules being broken. Here is the answer all you callers and others interested in getting the most out of the FM micro-transmitters. We have come up with a sturdy, easy to build folded dipole antenna with wide band characteristics perfect for transmitting or receiving.
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RAMSEY “LEARN-AS-YOU-BUILD” ASSEMBLY STRATEGY Be sure to read through all of the steps, and check the boxes as you go to be sure you didn't miss any important steps. Although you may be in a hurry to see results, before you switch on the power check all wiring and capacitors for proper orientation. Also check the board for any possible solder shorts, and/or cold solder joints.
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Since this is a “professional” antenna, we sincerely hope you put this together in a professional manner. This project will not work as well as you wished if you just slap it together without following good assembly techniques, and follow all instructions. If you have any questions with an assembly step, give us a call at the factory instead of jumping to conclusions, we will be happy to help you with any problems.
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RAMSEY TM100 PARTS LIST Included ❒ 15 Plastic wire tie wraps ❒ 5 3/16” ID, 1 1/4” OD fender washers ❒ 1 54” Piece of Ladder-line twin lead antenna cable ❒ 1 3’ Piece of RG174U thin lead coax ❒ 1 F Connector and hardware ❒ 3 1” schedule 40 PVC endcaps ❒ 4 1” x 12 5/8” schedule 40 PVC pipe pieces ❒ 2 1” x 10” schedule 40 PVC pipe pieces ❒ 1 1” 90 degree schedule 40 elbow ❒ 2 1" schedule 40 couplers ❒ 1 1” schedule 40 ‘T’ connector ❒ 1 F connector PCB (Smaller) ❒ 1 Ferrite choke core for thin coax ❒ 1 Impedanc
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CONSTRUCTION OF THE TM100 ❒ 1. Cutting the ladder-line twin lead antenna wire. To properly ‘size’ the antenna, we will want to center our measurements from the center point of the twin lead wire. Then measure from this point out exactly 27 inches in each direction as shown and then cut. You will need some fairly substantial clippers since the wire is copper coated steel (known as copperweld).
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❒ 4. Cut one leg of the twin lead wire exactly in the center. ❒ 5. Strip back the insulation on either side 3/8 of an inch (1cm). ❒ 6. Bend each exposed wire at a right angle in respect to the flat side of the antenna wire. ❒ 7. Mount the antenna wire to the component side of the PC board (the side Cut here Twin lead wire viewed sideways with no solder traces). Bend the twin lead antenna wires down through the PC board holes and over on the other side for a good mechanical connection.
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❒ 16. Thread the coax back up through the other hole shown. There should be about 3 1/2” (9cm) before the end. ❒ 17. Using the choke (large ferrite bead with two holes large enough for coax), loosely thread the coax up through one side and then back down through the other. There should now be less than an inch (2 1/2cm) of spare wire left over. ❒ 18. Solder the center lead into the hole shown directly below the choke. ❒ 19. Solder the shield conductors to the other hole shown.
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MECHANICAL ASSEMBLY We don’t want to glue anything yet until we are absolutely sure everything works, so for now we will press-fit all of the PVC parts together. Press fitting is good enough if you’re not planning on setting this up in hurricane conditions. ❒ 23. Using the PVC ‘T’ connector, slide one end of the twin lead through the top of the ‘T’. ❒ 24. Thread the coax through the leg of the ‘T’, you may have to slightly bend the ferrite choke core slightly to pass it through the ‘T’. ❒ 25.
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❒ 31. Use the diagram below to help you with the rest of the assembly. ❒ 32. Thread the coax through a fender washer. Slide the washer up into the leg of the ‘T’. ❒ 33. Use a tie wrap to hold the fender washer up inside of the leg of the ‘T’ and keep the coax wire tight to the PC board. You may have to re-arrange a few things on the PC board to make it fit. ❒ 34. Thread the coax through one of the 10” piece of 1” PVC pipe. ❒ 35.
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❒ 41. Cut the remaining coax so 3” to 4” (7 cm to 10 cm) is left hanging outside of the antenna assembly. ❒ 42. Referring to steps 11 - 14, prepare the end of the coax for soldering. ❒ 43. Bend the solder lug over to reach towards the center pin on the ‘F’ connector. Solder the braid of the coax to the solder lug. ❒ 44. Solder the center conductor of the coax to the center solder lug of the ‘F’ connector. ❒ 45. Place the endcap onto the pipe. ❒ 46.
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SETTING UP THE TM-100 The best place to mount an antenna is away from large trees and buildings but with a good line of sight to the places you want to reach. This means you will want to mount the antenna up high on a roof or an antenna tower. If you live in an apartment and that is not possible, you will want to mount the antenna in the center of a room for best performance or outside on the porch. Next you will want to be aware of the signal polarization.
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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.
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TRU MATCH FM BAND ANTENNA KIT Quick Reference Page Guide Introduction ...................................... 4 How Does It Work? .......................... 4 Learn As You Build .......................... 5 Parts List .......................................... 7 Construction ..................................... 8 Testing ............................................. 13 Setup ................................................