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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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AMATEUR RADIO TRANSMITTER sa AMATEUR RADIO TRANSMITTER ACCESSORIES xx AMATEUR RADIO Build this modified enclosure for the GLB synthesizer. Use it along with a bargain priced crystal controlled 2-meter f.m. transceiver. Instructions for building the Viking-5, a 5 watt solid state transmitter for the 3.5 and 7 MHz bands. How to add the low frequency 160 meter band to the Heath SB-220 linear amplifier. Build a 1935-style DX transmitter. Uses two tubes and is crystal controlled. Provides stable operation on 20 meters with a power output of nearly 3 watts. Est. cost: $20. How to build a stable, two-band (3.5 & 7 MHz) v.f.o. for the Viking-5 transmitter featured in the Feb 1979 issue. R.F. output measurement. Part 1. Input vs. Output power. Which is better? R.F. output measurement. Part 2. Building a wattmeter, an R.F. probe, and an in-line SWR/Wattmeter. CORRECTIONS to the QRP-420XC low power transceiver which appeared in a series of four articles in past CQ magazines (Nov 1977, Dec 1977, May 1978 & Oct 1978). An updated "Shoebox" linear amplifier. Part 1. A kilowatt linear amplifier built around five 6KD6 sweep tubes. A two-band V.F.O. for 80 and 40 meters is capable of driving the Viking-5 transmitter on both bands. An updated "shoebox" Linear Amplifier. Part 2. A power amplifier for 10 meter F.M. How to attach the vacuum relay break-in (QSK) system to the Drake T4XC-R4 combination transmitter. Using the Drake 2B receiver with the Heath HW101 transceiver. Includes helpful modifications to the HW101. A VXO (variable crystal oscillator) transmitter. Uses a 6L6 tube and crystal to tune the 80 meter Novice band. Capable of delivering 10 to 15 watts. The Viking 3x5. A solid state 4 watt V.F.O. transceiver for 20 meters. Part 1. QRPp unit fits into a 3"x5"x1" box. High S.W.R. protection for transceivers and amplifiers. This system allows a transceiver to be used with any antenna (or no antenna) without damage to the radio. The "Frugal Final". A low-cost multi-band linear amplifier. Uses a 4-400A commercial broadcasting tube which may be available free from your local radio station. Operates on 40, 20, 15, and 10 meters. Schematic for a tone burst circuit accessory for the Yaesu FT-207R microprocessor based 2 meter handi-talkie. Accompanies an article reviewing the FT-207R. The Viking 3x5. A solid-state 4 watt V.F.O. transceiver for 20 meters. Part 2. Turn a Collins S-line transmitter into a c.w. transceiver with the addition of a full break-in (QSK) and a modified b.f.o. circuit and trap filter. Converting the Sears-Roebuck 40 channel S.S.B. Citizens Band rig to 10 meters. The Viking 3x5. A solid-state state 4 watt V.F.O. transceiver for 20 meters. Part 3. Additional information. Simple inverse switching for the Kenwood TR-7400A two meter transceiver allows you to listen to the input side of the repeater. Build a noise operated COR (carrier operated relay) for a repeater. Improve the selectivity of your TS-820 transceiver. Requires no holes. Est. cost: $60. Build a two-chip c.w. transmitter for 80 or 40 meters capable of delivering between 160 and 200 milliwatts. Uses only two logic chips, three coils, a crystal and a handful of resistors and capacitors. How to modify Radio Shacks' Archer Space Patrol walkie-talkie to transmit on six meters. Useful only over a very short range with its 50 milliwatts of power. The 30 meter band. How to modify some currently available gear for 30 meters, plus antenna hints for getting the signal out. Converting the Swan 350C to 30 meters with a quick and simple modification. How to modify older receivers and transmitters to operate on new amateur bands (12, 18 and 30 meters). Construct your own 80 meter QRP/QSK c.w. transceiver. Includes complete break-in operation with no relays, a tunable receiver offset, battery low voltage indicator, and a side tone for monitoring. QRP transmitter is built into a small 4"x6" card file box. Built around one of the popular TTL series IC's and two or three transistors. Tunes from 80 to 20 meters. Build a one-tube, 10 watt c.w. transmitter on a 4"x5"x1" chassis, complete with power supply. Build a pocket-size 30 meter QRP transceiver with internal NiCad battery pack, v.f.o. and speaker. Replace the hardwired power-up frequency selector of the Heath VF-7401 two meter transceiver with this programmable frequency selector. How to add 30 meters to the Yaesu FT-901 transceiver. Est. cost: $20. More convenient mode switching for the ETO Alpha 78 linear amplifier requires only simple modifications. Modifications for the Heath HW-100 & HW-101. Includes an RIT control, 25 kHz divider, selectable AGC recovery time, and LED bargraph S-meter. Simple, easily assembled T-R switch compatible with a low-power c.w. transmitter. Est. cost: $10. How to build a portable QRP station. Utilizes a converted Sony ICF-7600 receiver and a nominal 5 watt, v.f.o.-controlled 40 meter transmitter. A 160 meter conversion for the Heath SB-201 and SB-200 linear amplifier. Construct a dual-purpose battery pack for the ICOM IC-2, 3, 4AT series of handheld transceivers. How to add a c.w. break-in circuit to the Kenwood TR-9000 transceiver. Build a 40 meter tube-type breadboard c.w. transmitter. A bare bones linear amplifier project will deliver 500 watts to an antenna. Uses a 3-500Z vacuum tube. Est. cost: $100. Using the Heathkit DX-60 transmitter on 30 meters without modification. How to get quick repeater selection on the Azden PCS-4000 2 meter transceiver. How to build a 2 and 10 meter repeater system on a shoestring budget. How to convert a Drake L4B from a pair of 3-500Z's to one 3CX1200A7 tube. Includes instructions for building a high voltage power supply for the new tube. How to build a low-price kilowatt amplifier. Est. cost: $200. Build a homebrew linear amplifier using 813 tubes. Mini-30. How to convert the "classic" QRP transceiver for operation on 30 meters. This pocket-size transmitter includes its own rechargeable battery. An economical way to refire the Clipperton L power amplifier. How to substitute inexpensive 811 tubes for very-expensive 572B tubes and still output about 700 watts CW. Beef up your Heathkit SB-200/220 linear amplifier power supply. An easy-to-build 8877 legal-limit amplifier for six meters. The first of four amplifiers which use a common power supply. Factory-recommended field modification for Microwave Modules Ltd. 6-meter linear transverter model MMT50/28S will increase selectivity of older units. Schematics for two classic vacuum-tube transmitters for 30 meters. Your first homebrew QRP rig. Build the TWOFER, a very low power transmitter that will work on 80, 40, 20, and 15 meters. CPR for dead HT batteries. (1) Helpful ideas on how to breathe more life into moribund nickel-cadmium packs. (2) Build a conversion unit that allows a HT to be powered by dry cell battery packs. Add a variable power control to the Kenwood TS-930S. This modification lets SSB/CW power be continuously variable in the normal fashion, with ALC provided at any preset level of power. Build a rechargeable, replacement battery pack for the Santec ST144UP 2-meter handheld transceiver. Est. cost: $17. Classic rigs for your classic keys. Schematic diagrams of two 1930s-vintage transmitters which are easy to assemble and produce an impressive low-power signal on today's HF bands. (1) Double M Special. (2) Tri-Setter. Update on the HF WARC bands (12, 17, and 30 meters). Includes antenna dimensions for WARC-band operations and tips on transceivers. Superhet 30 meter QRP transceiver project. Part 1. A superhet 30 meter QRP transceiver project. Part 2. Superhet 30 meter QRP transceiver project. Part 3. Conclusion. More classic rigs described. (1) 1934 "Globe Trotter" receiver. (2) 1928 "Gil Classic" transmitter. Two easy-to-duplicate transmitters right out of the 1940s and early 1950s. (1) John Ruskin Special 6L6 transmitter. (2) Li'l Buddy QRP transmitter. Bigger is better. A dedicated 160 meter KW amplifier. Schematic and mechanical diagrams included. The QRP-15 CW transceiver. A 15 meter (21 MHz) version of the 20 meter QRP transceiver which appeared in Ham Radio (Jan. 1989). An improved crystal-stabilized version of the classic Crystal Hartley transmitter. Runs 2 watts on 30 or 40 meters. The Transformerless Wonder. A 3 watt 30-meter transmitter that uses a floating ground and must be constructed on a wooden chassis. Semiconductor Space Scanner. Construct a replica of one of the first home brewed solid-state transmitters (circa 1950s) which ran 90 milliwatts on 15 meters. The QRP-20 Plus 20 meter CW transceiver. How to build and enjoy using an expanded version of a popular kit. QRP fun. Part 1. Miniature QRP keys with built-in transmitters. QRP fun. Part 2. Two ultra-low-cost and easy-to-build transmitter projects. Overview on 2 meter duplexers and repeaters and how they work. Modifications for Heathkit power amplifiers. (1) Meter protection. (2) Flashover tube protector. (3) Saturated transistor antenna switch. Classic radio circuit reproductions. (1) QRP Midget tube-type 30 meter transmitter (circa 1967). (2) 1940s-style Low Boy 6L6 transmitter. (3) 1930s-style Hartley transmitter. (4) 1920s-style one-tube oscillodyne receiver. Classic radio circuit reproductions. (1) PeeWee AM transmitter. (2) 1940s two-tube Superhet receiver. (3) 1930s-style push-pull two-tube oscillator transmitter. QRP transmitter projects. (1) Oner is built on 1" square PC board and outputs 1 watt. (2) Sweet Nuttin' 30 meter pocket-size transceiver. The 40 meter fun machine. How to build a 2 watt, 40 meter CW QRP transceiver in six steps. Part 1. The 40 meter fun machine. Part 2. The transmitter. The 40 meter fun machine. Part 3. The VFO and push-push doubler circuit. The 40 meter fun machine. Part 4. Product detector, audio preamplifier, and RC active filter. The 40 meter fun machine. Part 6. The AGC circuit and SWR bridge. Homebrew classics from the 1950s. Part 1. Schematic for a crystal-controlled 6L6 tube-type transmitter which features wide range pi-net output, and runs 3 to 6 watts output. Homebrew classics from the 1950s. Part 2. Schematic for the famous 6AG7 transmitter (80 meters or 40 meters). Constructing the classic 1960s "Bare Essentials" transmitter from "Electronics Illustrated" magazine. Uses a 50C5 miniature tube, transformerless voltage-doubler power supply, and basic crystal-oscillator arrangement. Output power is between 5 and 8 watts. Getting started with QRP (low-power) amateur radio. Schematics for building a simple 1/4-watt CW transmitter, boosting the power to 1 watt, adding a keying switch, shifting the frequency, etc. Schematic for a simple 1932-style phone transmitter. Schematic for an ultra-simple QRP transmitter is based on the HA7210 self-contained crystal oscillator IC. Internationally famous two-chip 250 milliwatt QRP transmitter uses four 1.25 volt mini cells for power. Build a battery powered QRP setup consisting of a one-tube regenerative receiver and 500 milliwatt 1S4 transmitter. Covers 80 and 40 meters and shortwave between 3.5 and 9 MHz. How to build a QRP transceiver for the novice 15 meter band. Schematic for a "one chip" micro-power 6 meter FM transmitter. Schematic for a 1933-style phone transmitter for 10 meters that is thoroughly modern. A typical QRP CW transmitter circuit and design philosophy. Useful information when developing circuits of your own or troubleshooting existing QRP transmitters. Micronaut, an ultra-low-power transmitter for "sport QRP". Homebrewed batteries which power the Micronaut utilize ordinary hardware and "Tabasco" sauce. Part 1. Micronaut. Part 2. Building from scratch vs. kit building. Build your own 30 meter QRP transceiver. It is a single-down-conversion superhet with two IF crystal filers and a 400 Hz audio filter for selectivity. Build a 40 meter QRP Titan 5-watt CW transmitter. An ultra-simple QRP transmitter for 80 meters utilizes the Analog Devices' AD811AN op-amp. "Big Daddy" Hartley. Constructing a replica of a 1929 "big bottle" vacuum tube radio transmitter for use on today's bands. A 1997 rendition of the ever-popular 1967 "Sucrets" box twins. A miniature transmitter (Wee Mitter) and receiver (Wee Ceiver) each of which uses a "Sucrets" throat lozenge box as the chassis. Circuit for a simple 1938-style 50 watt transmitter with vacuum-tube keyer. The QRP 30 Plus. A compact 30 meter transceiver project for the more experienced builder. Features a selectable RF output of either 4 or 8 watts and uses a sensitive superhet receiver with a sharply peaked audio output at about 750 Hz. Could be used for other bands by modifying the tuned circuit. A QRP high-power AM transmitter circuit for 75 meters that uses one of four alternative power amplifier tubes. Circuit diagram for the miniature Tixie QRP transceiver. Includes tips on constructing the Tixie kit from Embedded Research and modifying the circuit for other bands. Homebrewing surface-mount style. Assembly tips for three QRP kit projects that utilize SMT devices. Kits include an ultra-small Pixie transceiver, a universal DC-to-DC converter, and a deluxe-featured electronic keyer. Vintage tubes and classic rigs. Part 1. (1) Starting a mini-collection of classic vacuum tubes. (2) Classic Western Electric WE311B 40 meter transmitter circuit diagram and construction tips. (3) Classic spider-web-coil equipped Reinartz 2 receiver circuit diagram and construction tips. Vintage tubes and classic rigs. Part 2. (1) 35T triode vacuum tube transmitter circuit diagram and construction tips. (2) Twin 75TL tube RF amplifier circuit diagram and construction tips. Modifying the Kenwood TS-940 transceiver for improved split mode operation. Simple modification of the Yaesu FT-101 and other rigs can eliminate transmitting on the wrong VFO in a split operation. Gaseous-state transmitter uses a 6L6/GC vacuum tube, wooden chassis, and a power transformer from an old TV set to put a 25-watt CW signal on the 40-meter band. Three-unit, 2-band ham station for $50. Auto switching from transmit to receive and back again. Compressor-limiter for CB and ham keeps modulation level the same. Crystal-controlled 80 and 40 meter CW transmitter with input power up to 10 watts. Ham/CB in-line modulation monitor. Two transistor, battery-operated CW rig has 1/2 watt input power. Portable 40 watt, 80 meter transceiver fits into attache case and weighs 10 lbs. "Mini-Mitter". A 28.5 oz. transmitter that can put a clean 15-watt (input power) signal on the 40-meter band. Uses two tubes. "The Flexible Flea". A flea-power transmitter (100 milliwatts to 5 watts) which works on 20-, 40-, and 80-meters. Uses one tube. A 40-watt channelized ham transmitter. Designed for instant frequency changes with the ease and convenience of CB channel switching. Features an 11-position switch. A one-tube transmitter for the 40-meter band. Has 15-watt input and 6-watt output. Est. cost: $15. A 160-meter ham station. Part 2. The transmitter, 100 watts input on AM phone or CW. Three-transistor transmitter for 80-meter band with 2.5 watts input. Fits in a small carrying case along with a transistor radio which is used as the receiver. Battery powered. A 40- and 80-meter CW transmitter contains only the bare essentials and costs only $7 to build. Junior ham transmitter is a modulated CW rig which operates in the 27-mc license-free band. Input limited to 100 mw. Wireless CW monitor is triggered by the transmitter's RF output of 30 watts or more. Est. cost: $10. A 20-watt transmitter that operates on 40- or 80-meters by changing coils. Est. cost: $20. Robot operator transmits audio material recorded on a 2- or 4-track tape recorder over ham radio. Crystal-controlled solid-state ham transmitter for 40- and 80- meters uses two transistors for 18 watts of input power. Filter eliminates spurious harmonic radiation from any low-power transmitter (under 100 watts input). Flea power ham transmitter puts out 1 watt with a 12-volt power source. A 40-meter ham transmitter with continuously variable power inputs from 1/4 to 20 watts. Gaseous-state transmitter. Inexpensive 25-watt transmitter for the 40-meter ham band uses a 6L6/GC vacuum tube, a wooden chassis, and a power transformer from an old TV set. Those indestructible novice transmitters. A review of 1950's crystal-controlled novice transmitters for morse code. Tips on locating and using these old tube-style transmitters. Myths and misinterpretations surrounding the use of high-power linear amplifiers for boosting a signal. Build a license-free transmitter for 1,700 meters. Vacuum-tube transmitter will send code transmissions in the 40-meter amateur band. A low-power (QRP) one-tube unit based around a type-3A5 twin-triode vacuum tube. Powered by a 3-volt and a 135-volt battery. Est. cost: $100 (kit). Choosing your first ham station rig. Includes a list of equipment readily available on the used market. Convert CB walkie-talkies to 6, 10 or 15 meter operation. Short-range CW transistorized transmitter doubles as a CPO. Transistorized transmitter tune-up meter circuit. Companion 6-meter phone transmitter has only two tubes. Paragon 144. A 2-meter phone transmitter rated at 20 watts input on AM phone. Single transistor flea-power "Milliwatter" transmits readable CW signals over a distance of 3 miles without a battery by using a steam-driven generator. Camper's special, a battery operated 80-meter CW transmitter for use in the field or as a standby. Est. cost: under $10. Converting a 6-meter transmitter to FM by means of this FM modulator will eliminate television interference. The incredible VFO. A stable, passive, variable-frequency oscillator (VFO) eliminates the need for crystals on some transmitters. Amateur radio for CB'ers. How to convert a citizens band radio to the 10-meter amateur band as an inexpensive start in amateur radio. Part 1. Amateur radio for CB'ers. How to convert a citizens band radio to the 10-meter amateur band as an inexpensive start in amateur radio. Part 2. Build the QRP midget. A two-tube battery-powered transmitter that will fit in the palm of your hand. Works on 80-, 40-, or 20-meter CW with 2.5 watts input. Est. cost: $10. Hart-65 transmitter. Novice CW transmitter with an input of 65 watts for the 80- and 40-meter bands. Use only one tube. Designed for minimum television interference. Est. cost: $20. Modulation monitor for ham and CB AM phone transmissions. Convert a low-cost, low-power AM multiband amateur transmitter, like the Globe Scout 680, to a modern 6-meter rig. Low-cost, low-power 40-meter transmitter delivers up to 10 watts. Est. cost: $25. Battery-operated 40-meter transmitter uses a FET crystal-oscillator and ferrite toroid core coil. One-watt transmitter for the 1750 meter (160-190 kHz )band requires no operator's license. How to calculate actual effective radiated transmitter power and some ways to improve on it. Getting the most from your transmitter. Some helpful hints for the ham or CB'er. Resurrecting an old amateur radio transmitter. What to look for when purchasing and restoring old ham equipment. Economy Six. Build a 6-watt Morse-code transmitter for the 40-meter band. Est. cost: $20. The use of double-balanced frequency mixers in ham radio equipment. Build a vacuum-tube transmitter for the 40-meter amateur band. This low-power (QRP) code sender operates on batteries. Est. cost: $100 (kit). Getting started in QRP. Part 2. Tips on building and operating the Ramsey QRP-30 (30-meters) transmitter kit. A 6-meter, solid-state, 1/4 watt walkie-talkie transmitter. Est. cost: $35. An ideal first transmitter for the novice ham. Has one tube and 3-band switching. Can be used to tune the 20-meter band when general-class license is secured. Est. cost: $30. (less crystals). Tips on eliminating "chirp", the carrier shifting in frequency each time the transmitter is keyed. Two circuits for flea-power transmitters. One operates on a 3.5- to 3.8-MHz CW band and the second is equipped for both phone and CW on the 15-meter band. Four-band QRP low-power transmitter has less than 10 watts input using a 6-volt DC power source. Output is either on the 15-, 20-, 40-, or 80-meter amateur CW bands. Entire unit fits in a 4"x4"x6" case. Modifications for the Heathkit HW-16 novice CW transceiver. A 4-band CW transistorized transmitter covers 15-, 20-, 40-, and 80-meter amateur bands. Flea-powered rig (less than 10 watts input). Uses a six or nine volt power source. Battery-powered code monitor allows sender to hear the code being transmitted. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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