Ramsey Electronics FT146 Manual de instrucciones

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FT146 1
2 METER FM 5 WATT
TRANSMITTER KIT
Ramsey Electronics Model No. FT146
Direct, true FM for excellent voice and data quality.
Both Data and mike audio inputs
Solid 5 watt RF output - add our PA-146 for 40 watts
Crystal controlled with 146.52 MHz crystal included
Built-in test points for easy tune-up. Align with any
digital multimeter - tuning tool included, too!
Runs on 12 - 14 Volts DC at less than 1 amp
Easy assembly and hook-up
Informative manual answers questions on theory, hook-
ups and uses - enhances resale value, too!
Add our case set for a finished 'Pro' look. Cases match
all Ramsey products
Clear, concise assembly instruction carefully guides
you to a finished kit that works the FIRST time!
Here's a simple hard-working transmitter that's ideal for
repeaters, Fox-hunts, remote bases, Packet - you name it! Why
tie up a whole transceiver to just use the transmitter? Fun and
educational to build - you'll be on-the-air in an evening!
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Indice de contenidos

Pagina 1 - TRANSMITTER KIT

FT146 • 1 2 METER FM 5 WATT TRANSMITTER KIT Ramsey Electronics Model No. FT146 • Direct, true FM for excellent voice and data quality.

Pagina 2 - FT146 • 2

FT146 • 10 ❒ 21. Install R15, 10K ohm (brown-black-orange). ❒ 22. Install C33, .001 uf disc capacitor (marked .001, 1 nf or 102). ❒ 23. Install R16,

Pagina 3 - FT146 FM RECEIVER

FT146 • 11 ❒ 41. Install R7, 470 ohm (yellow-violet-brown). ❒ 42. Identify Q1, a 2N3904 NPN transistor (marked 2N3904). Install Q1, observing correc

Pagina 4 - INTRODUCTION

FT146 • 12 ❒ 60. Install C21, 4.7 or 5 pf disc capacitor (marked 4.7 or 5 or 4.7K or 5K). ❒ 61. Install L9, slug tuned shielded coil (marked 007007

Pagina 5 - FT146 CIRCUIT DESCRIPTION

FT146 • 13 stages of your transmitter. We recommend that you get them ready for installation before assembling the Driver and Final stages. If you pre

Pagina 7 -

FT146 • 15

Pagina 8 - FT146 • 8

FT146 • 16 The "legs" or leads for inserting L2, L7, L3 and L4 should be about " long. These coils should sit about 1/8" maximum a

Pagina 9 - FT146 • 9

FT146 • 17 ❒ 97. Install D4, 1N4148 style signal diode (glass body with black band). Observe correct orientation of the banded end. ❒ 98. Install TP

Pagina 10 - FT146 • 10

FT146 • 18 ❒ 112. Install C2, 100 to 220 uf electrolytic capacitor. Be sure to observe polarity - especially with this part since it is directly acros

Pagina 11 - FT146 • 11

FT146 • 19 coil drastically whenever it is inserted into the coil. You may use a metal hex key if you are aware of this effect and are willing to rem

Pagina 12 - Markings on this

FT146 • 2 RAMSEY TRANSMITTER KITS • FM10, FM-25 FM Stereo Transmitters • TV6 Television Transmitter • Cube TV Transmitters

Pagina 13 - 6 hole ferrite

FT146 • 20 ❒ 8. Move your meter probe over to TP2, key the transmitter and adjust L5 and L11 for maximum negative reading. Once again, go back and

Pagina 14 - FT146 • 14

FT146 • 21 transmitter keying in a receiver is of some help, but even the simplest crystal oscillator can send a fine signal into your neighbor's

Pagina 15 - FT146 • 15

FT146 • 22 Amateur radio magazines and handbooks provide a variety of circuits for RF wattmeters and relative field-strength indicators, including met

Pagina 16 - Wire sits flat

FT146 • 23 "hum-m-m-, that's not a .001 uf where a 100 pf should be is it?" If there is a problem in getting the modulation working, a

Pagina 17 - FT146 • 17

FT146 • 24 Here's a handy reference chart for the 5 pin DIN jack PIN # FUNCTION

Pagina 18 - Leave leads long

FT146 • 25 NOTE ON REPLACEMENT PARTS: If you lose or damage parts during assembly or testing, you may, of course, order any needed replacement parts

Pagina 19 - FT146 • 19

FT146 • 26 FT146 PARTS LAYOUT DIAGRAM

Pagina 20 - FT146 • 20

FT146 • 27 The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved without contacting

Pagina 21 - FT146 • 21

FT146 • 28 FT146 2 Meter FM Transmitter Kit Quick Reference Page Guide Introduction to the FT146 ... 4 Circuit Description ...

Pagina 22 - FT146 • 22

FT146 • 3 FT146 FM RECEIVER KIT Ramsey Publication No. MFT146 Price $5.00 TABLE OF CONTENTS Introduction to the FT146 ... 4 Circuit Des

Pagina 23 - FT146 • 23

FT146 • 4 INTRODUCTION Two meter FM has been around for years, but never with the popularity that is enjoyed today. In the old days, hams snooped aro

Pagina 24 - FT146 • 24

FT146 • 5 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 pl

Pagina 25 - FT146 • 25

FT146 • 6 into transmit. There is no need to control the voltage to any other transistors since they all operate class "C". A class C amplif

Pagina 26 - FT146 PARTS LAYOUT DIAGRAM

FT146 • 7 Inductors and ferrite cores: ❒ 2 Shielded can tunable inductor (marked 007007) [L9,13] ❒ 2 Tunable inductor (pink plastic body) [L5

Pagina 27 - The Ramsey Kit Warranty

FT146 • 8 RAMSEY Learn-As-You-Build KIT ASSEMBLY: There are over 200 solder connections on the FT146 printed circuit board. That means your work co

Pagina 28 - FT146 • 28

FT146 • 9 ❒ 3. Install J2, the subminiature phone jack. Solder all three points. Be gentle and patient in inserting, so as not to damage the solde

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