Ramsey Electronics HR40 Manual de Instruções

FHT-1 • 1 Sly Fox FOX-HUNT TRANSMITTER KIT Get involved in the fox hunting fun! This kit combines a crystal locked true FM transmitter with a micr

FHT-1 • 10  1. Install J2, the subminiature phone jack.. Gently push the solder tabs through the PC board being careful not to bend or strain th

FHT-1 • 11 black-orange).  17. Install R21, 1K ohm (brown-black-red).  18. Install C39, .01uF disc cap (marked .01 or 103 or 10nF).  19. Next w

FHT-1 • 12 uses the same pin configuration as one. When installing be careful not to bend the solder pins, and make sure to push the switch flat to t

FHT-1 • 13 microcontroller, causing the crystal oscillator's frequency to change - in exact step with your CW ID. Voila, FM or Frequency Modul

FHT-1 • 14  60. Install C5, .01 uf disc capacitor (marked .01 or 10 nf or 103).  61. Install R3, 47K ohm (yellow-violet-orange).  62. Install

FHT-1 • 15  65. Install L13, another slug tuned shielded coil (marked 007007). This coil is also part of the first tripler section.  66. Install

FHT-1 • 16  79. Install C25, 12 pf disc capacitor (marked 12 or 12K).  80. Install C17, 2 or 2.2 pf disc capacitor (marked 2 or 2.2).  81. Inst

FHT-1 • 17  84. Winding L2 and L7: Use the heavy gauge tinned bus wire in your kit for these coils. Wind these coils on the threads of the provide

FHT-1 • 18 the side with the markings faces towards the jumpers that you just installed(JMP5 and JMP6). See the parts placement diagram for correct

FHT-1 • 19 Also there is a provision to adjust the “high power” output. Notice that jumper J5 connects the collector of Q8 to the final transistor Q6

FHT-1 • 2 RAMSEY TRANSMITTER KITS • FM-10, FM-25 FM Stereo Transmitters • FM-1,2,4 FM Wireless Microphones • PB-1 Telephone

FHT-1 • 20 case to the PC board ground plane. The SD1127 power transistor is designed by the manufacturer to be soldered directly to a PC board gro

FHT-1 • 21 pass through the “component “ side of the circuit board. Pay particular attention to the disc capacitors to ensure that there is a good s

FHT-1 • 22  124. Install C15, 39 pf disc capacitor (marked 39 or 39K).  125. Install L4, 2½ turn coil wound previously. Make sure it seats as close

FHT-1 • 23 this is accomplished, proceed to slide the screws through the holes in the filter PC board, and finish up by installing the last two #4-40

FHT-1 • 24 CONGRATULATIONS This completes our assembly of the FHT-1 Sly Fox transmitter, now's a good time to give your masterpiece a good goi

FHT-1 • 25  7. Adjust L9 and L13 for maximum indication on TP1. No more than a turn or two is needed. You will have to go back and forth between

FHT-1 • 26 VERIFYING TRANSMITTER RF OUTPUT The most important thing to know is whether your transmitter is delivering some measurable and reassuri

FHT-1 • 27 at full brilliance presents only an 8.2 ohm load to the transmitter. Because of this, the transmitter may act "flaky" when tunin

FHT-1 • 28 Amateur radio magazines and handbooks provide a variety of circuits for RF wattmeters and relative field-strength indicators, including me

FHT-1 • 29 cells" in series with your power source, if a full 13.6-15 volts DC is not available. A word of caution concerning wall plug style AC

FHT-1 • 3 SlyFox FOX HUNT TRANSMITTER KIT Ramsey Publication No. FHT-1 Price $5.00 TABLE OF CONTENTS Introduction to the FHT-1 ... 4 How

FHT-1 • 30 poor regulation, AC ripple content and RFI susceptibility. If your supply voltage is in the 11-12 volt range, you can expect a 600 to 800

FHT-1 • 31 MODE 0 PROGRAMMING: The FHT-1 has 16 different modes of operation of increasing difficulty. The mode is selected by setting the DIP switc

FHT-1 • 32 All switches on equals the highest tone frequency. For a frequency of 1000 Hz set S3-4 and S3-1 on.  13. Clo

FHT-1 • 33 As you can see mode 1 will send the ID (15sec.) then wait 45sec. and then start over. This is the beacon mode Identifying once per minute

FHT-1 • 34 Fox Hunt Transmitter FHT-1 Quick Reference Page Guide Introduction to the FHT-1 ... 4 How it works ...

FHT-1 • 4 INTRODUCTION Finding a small, hidden radio transmitter may seem fairly easy at first, but with a sly transmitter the hunt can be made ve

FHT-1 • 5 FHT-1 CIRCUIT DESCRIPTION Basic overview: The FHT-1 is a crystal controlled FM transmitter that uses a varactor modulated crystal oscill

FHT-1 • 6 FHT-1 FOX-HUNT TRANSMITTER KIT PARTS LIST Resistors and potentiometers:  1 2 ohm resistor (red-black-gold) [R6]  2 47 ohm resist

FHT-1 • 7  2 Small ferrite bead core [L10,12]  2 Aluminum coil shield cans [for L5,11] Semiconductor devices  1 1N4002 style black e

FHT-1 • 8 RAMSEY Learn-As-You-Build KIT ASSEMBLY There are over 200 solder connections on the FHT-1 printed circuit board. That means your work cou

FHT-1 • 9 FHT-1 PC Board component placement diagram Battery Backup + - Micro External Switch connections (opt) S1 TEST Connections short leads TP