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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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CB RADIO ACCESSORIES xx CB RADIO Remote controlled built-in signaler. Microphone preamp for CB. Transistorized CB signal booster. A 16 dB speech compressor for CB. Modulation meter for citizens band. Add a handset to CB transceiver. CB direct reading power output meter. Citizens Band sideband adapter. Peaking headphones for CB. Light to show transmission is okay. Auto switching from transmit to receive and back again. Remote extension for two-place send and receive. Low-cost direction finder. Compressor-limiter for CB and ham keeps modulation level the same. Modulation monitor warns when you exceed 80% or 100%. Ham/CB in-line modulation monitor. Channel Slicer Boosts selectivity of low-cost CB rig eliminating adjacent channel interference. Modulation booster for extending transmitting range. Est. cost: $10. Telephone patch for connecting a CB transceiver to your telephone. Lightweight rechargeable battery power pack makes any 5-watt transceiver a "portable" with power from 1-1/2 to 8 hours on a single charge. Convert spectrum monitor or oscilloscope to a CB modulation monitor with this $5 adaptor. Volume leveler maintains constant volume regardless of the strength of the received signal or the volume control setting. Adapting a solar cell to power a CB walkie-talkie. Tape compressor. A device which will automatically adjust recording sensitivity to correctly record loud or soft noises at the same sound level. Also useful to maintain constant amplitude with CB or ham radio transmission. CB Pager. Rebroadcasts incoming CB calls to you through any broadcast radio by means of a low power broadcast band oscillator. Range limited to 100 ft. Output meter for solid-state CB rigs. RF output meter will indicate relative output power, modulation, and changes in the antenna-systems SWR. Est. cost: $10. Vest-pocket modulation scope. A peak indicating modulation instrument for citizens band radio. Uses a 1EP1 cathode-ray tube. Est. cost: $25-$50. A modulation and power meter connected permanently between a CB transceiver and its transmission line. The two-meter unit measures RF output power, percentage of modulation, and carrier shift. Works with any 5-watt transceiver having an antenna SWR of 1.2/1 or less. Microphone preamp for use with CB produces a 15 to 20 dB gain. Est. cost: $10. The FET VOX, an electronic device which automatically switches a transceiver to the transmit mode when you start speaking, without flipping a switch manually. Circuit installed between CB transmitter and antenna will flash lights to show when a modulated signal is actually reaching the antenna. Measure the output power of Citizens Band transmitters with this accessory for your VOM or VTVM. Est. cost: $4. Power supply using C or D size alkaline-energizer cells to make a solid-state CB set truly portable. CB phone patch. Voice-operated CB repeater will rebroadcast the voice at one receiver to another receiver nearby (within 1/4 mile). Single sideband adapter for CB. In-line RF wattmeter gives you a constant check on your tranmitter's power output. Grid-dip oscillator for the proposed Class E citizens band (220 mc). Build a modulation meter for CB. Adding selective call systems (encoders and decoders) to a CB rig. One diode and capacitor added to any AM detector will nearly double the output. Can also be used on CB, shortwave or crystal sets. Regulated power supply puts out the 13.8 volts needed by the newer 4-watt output CB mobile transcievers. Converts 117-volt AC to 13.8-volt DC in either 1.5-amp or 3-amp version. Est. cost: $25. Install switch-selectable remote speakers around your house and yard in order to monitor CB, act as an intercom or provide entertainment. 13.8 volt regulated power supply converts a CB mobile transceiver or a 3 to 5-watt CB handi-walkie to base station operation. How to build a console for the transmission hump of a car that also hides a CB radio. Circuit for a transmission indicator that is 100 times more sensitive than field strength meters. Est. cost: Under $10. Circuit for a simple receiver (monitor) which allows you to hear your own output signal. Schematic for a simple power supply to power a 13.8 Vdc CB radio from a 120 Vac source. Schematic for a simple R-F (radio frequency) meter for use with a CB transceiver. Technique for adding a second CB speaker wired in parallel using ordinary lamp cord. Techniques for using an SWR meter for a new CB radio installation to ensure that everything is connected and tuned properly. Simple circuit using an NE-2 neon bulb may reduce noise interference on CB speakers. Simple indicator clipped to a mobile CB antenna lights a lamp whenever you transmit. Schmetic for a harmonic trap to help eliminate TV interference caused by your CB radio. Variable tuner for use with fixed tuning receiver. Compression amplifier will double talk power. Mechanical filter sharpens bandwidth for optimum reception of AM, CW, SSB, and CB. Adding a switch and a few crystal sockets to a single crystal transceiver to get more channels. CB radio call monitor. A frequency-selective circuit monitors a CB channel listening for a special tone signal from the calling station. When the special tone is sensed, the monitor turns on a visible or audible indicator at any location. This signal alerts the operator that he is being called. Trans-VOX. Transistorized, supersensitive, voice-operated relay turns transmitters, tape recorders and other equipment on and off. You simply plug your microphone into Trans-VOX and plug Trans-VOX into the device to be controlled. Est. cost: $19. CB audio leveler. A low distortion preamplifier which you connect between your low-impedance microphone and your transmitter. This unit will amplify weak signals while attenuating strong ones, thus providing a constant-level modulating signal to the transmitter. Est. cost: $9. Modulation monitor for ham and CB AM phone transmissions. Circuit for running a negative ground mobile radio from a positive ground auto electrical system. Circuit for an RF output indicator which can be wired into a CB transmitter. Installing a phone patch on a CB set. A hi-lo pass filter for a CB transceiver. It drains off dc or low frequency signals caused by static electricity build-up on the antenna and it reduces interference to nearby TV receivers. CB interference with TV. Part 1. Using a high-pass filter or series-tuned wave trap to overcome "fundamental blocking", a primary cause of TV interference from CB radios. Is your CB station ready for an emergency? Procedures to follow in an emergency. Circuit for a standby 12-volt emergency power system built around an auto battery and trickle battery charger. Build the 5-minute "on", 1-minute "off" timer to help you comply with FCC regulations. A red, yellow and green light tells you what you can (or should) be doing now. Selective call receiver monitor turns on the CB audio only when a special signal is received. Using an agreed-upon channel, the caller and receiver have electronic devices to send and receive the special signal. Est. cost: $50. Build a silencer. Squelches auto radio or tape player whenever a CB signal begins or CB transmitter is used. Circuit allows a 4-ampere automobile battery charger to be used as a base power supply for a mobile CB transceiver. Selecting and installing the automobile slide mounts that allow radios and tape players to be easily removed from car to prevent theft. Tip: Use a polarized plug to make it easier to remove your CB radio from your car and take it with you. Build a preamplifier for long distance CB reception. This device connects between transceiver and antenna and works only on signals being received, not being transmitted. Est. cost: $15. Build a CB (citizens band) frequency counter that covers from 5 Hz to 30 MHz. Uses a five-digit LED to indicate what frequency you are using. Est. cost: $60. Automatic switch for your car radio turns it on and off so it does not interfere with CB reception or transmission. Est. cost: $15. Call-Alert. Eliminate the constant chatter on your favorite CB channel or 2-meter repeater. The audio is blocked until the correct touch-tone sequence is received. Est. cost: $49 (decoder) and $23 (encoder). Four-transistor audio compressor boosts modulation. Est. cost: $10. Use a dual voice coil speaker to receive signals from two different receivers. Levels can be preset so that one signal source is reproduced as a background level and the second signal comes in much louder and overrides the background signal. Either signal circuit can be shut off. Est. cost: $10. Battery-powered microphone preamplifier for citizens band should provide a gain of 10 dB with a flat frequency response from 20 to 15,000 Hz. An in-line, peak-indicating modulation meter designed especially for CB and ham radios. Features built-in calibration for carrier-to-modulation. CB crystal tester checks for stability, activity and helps align receiver. Microphone preamplifier for CB transceivers. Output level is adjustable. Citizens band voice shaper, a device that attenuates the lower frequencies of your voice making it crisper and more understandable. Citizens band speech processor incorporates bass and treble controls, up to 20 dB of clipping, and up to 40 dB of speech AGC, in one convenient control box. | |||||||||
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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