Ramsey Electronics HR40 Manual de Instruções descarregar pdf (Página 4)

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 very challenging! With the

interest in radio foxhunting on the rise, the need arose for a low cost

transmitter to be used as the radio “fox” for the hunt! The problem is trying to

configure a HT or converted commercial band transmitter to key at different

times, ID itself, and perhaps leave a brief message. By the time all these

components are assembled together, a small fortune is usually invested in

radios, timers, and ID’ers with a good deal of interconnection necessary.

What’s really needed is an inexpensive portable transmitter with all these

options built in, and that's why the FHT Fox Hunt Transmitter was created.

Also, building your own rig is one of the most satisfying and rewarding

experiences you can have - and that's what ham radio is all about! This little,

easy to understand two meter FM transmitter is our attempt to provide the

ham community with a simple, fun to build kit that you'll enjoy operating at a

fox hunt, especially when you tell the other operators that the fox rig is a

home-brew.

Most Ramsey Electronics kits can be classified as "Skill Level 1" if we use

the old Heathkit



guidelines for ease of assembly. That means that our kits

are intended to be successful for first-time kit builders. This FHT-1 Fox-hunt

Transmitter is best regarded as a "Skill Level 2" project, and should not be

taken lightly, even by experienced, licensed radio amateurs. Still, this step-

by-step manual is written with the beginner in mind, because we are well

aware of the fascination fox hunting holds, which means this could be your

very first kit project. To be honest, we'd like to see first-time builders start out

with an easier kit such as the Ramsey HR-40 forty meter all-mode receiver

before assembling the FHT-1, but we are confident that you can construct

the FHT-1 successfully if you follow this manual carefully and patiently.

Before beginning the project or even studying the circuit description, it’s

worthwhile to develop some prior respect for how much transmitter is packed

onto the circuit board. The dozen semiconductor devices (diodes, transistors

and IC chip) give the equivalent of about 130 or more transistors and diodes.

And, in addition to 13 inductors, a crystal and the various plugs and jacks,

there are over 60 capacitors and resistors. Surely, all that should result in a

decent transmitter! You could easily spend twice the money plus hours of

time trying to gather the equivalent parts from catalogs and still need to make

your own circuit board.

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Ramsey Electronics HR40 Manual de Instruções Página 4