Ramsey Electronics CT255 manual Ramsey Transmitter Kits

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RAMSEY TRANSMITTER KITS

FM100B Professional FM Stereo Transmitter

FM25B Synthesized Stereo FM Transmitter

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TV6 Television Transmitter

RAMSEY RECEIVER KITS

FR1 FM Broadcast Receiver

AR1 Aircraft Band Receiver

SR1 Shortwave Receiver

SC1 Shortwave Converter

RAMSEY HOBBY KITS

SG7 Personal Speed Radar

SS70A Speech Scrambler

BS1 “Bullshooter” Digital Voice Storage Unit

AVS10 Automatic Sequential Video Switcher

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PG13 Plasma Generator Kit

IG7 Ion Generator Kit

R2XL1 Balanced to Unbalanced Audio Converter Kit

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RAMSEY AMATEUR RADIO KITS

HR Series HF All Mode Receivers

QRP Series HF CW Transmitters

CW7 CW Keyer

CPO3 Code Practice Oscillator

QRP Power Amplifiers

RAMSEY MINI-KITS

Many other kits are available for hobby, school, Scouts and just plain FUN. New kits are always under development. Write or call for our free Ramsey catalog.

COMPUTEMP 255 KIT INSTRUCTION MANUAL

Ramsey Electronics publication No. MCT255 Rev 1.1a

First printing: November 2001

COPYRIGHT 2001 by Ramsey Electronics, Inc. 590 Fishers Station Drive, Victor, New York 14564. All rights reserved. No portion of this publication may be copied or duplicated without the written permission of Ramsey Electronics, Inc. Printed in the United States of America.

CT255 2

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Contents Computemp 255 Binary Thermometer KIT Ramsey Transmitter Kits KIT Assembly CB B OA RD in CA SE IntroductionCircuit Description Binary counterScaling to Celsius DAC Digital to Analog ConverterADC Analog to Digital Converter? In a sense… More on the ADC Oh that extra countFor the complicated Fahrenheit design How the counter oscillator worksRestarting the conversion cycle CT255 Binary math Bit # Value 128 Some random parts, and what they do CT255 Schematic Diagram CT255 Parts Layout Diagram Resistors Parts Supplied with Your CT255 KITCapacitors SemiconductorsRamsey LEARN-AS-YOU-BUILD KIT Assembly Enough of that ... let’s get startedCT255 Thermometer Assembly Instructions CT255 CT255 CT255 Front View LM35DZ Assembly Instructions for Custom Case CongratulationsUSE of Your Computemp Troubleshooting Guide Still Having TROUBLE?Conclusion Ramsey Kit Warranty Ramsey ELECTRONICS, INC Required ToolsAdditional Suggested Items Fishers Station Drive Victor, New York Phone 585

CT255 specifications

The Ramsey Electronics CT255 is a versatile and advanced communication tool designed for radio enthusiasts and professionals alike. As a 2-meter FM transceiver, it is known for its robust performance and extensive feature set, making it ideal for both casual users and serious operators.

One of the standout features of the CT255 is its compact design, allowing for easy integration into various environments such as home stations or portable setups. The unit is built with user-friendliness in mind, featuring an intuitive interface with a clear display and easily accessible controls. This ensures that users can quickly tune into their desired frequencies and modify settings without extensive technical knowledge.

The CT255 operates on a frequency range from 144 to 148 MHz, providing access to the popular 2-meter amateur radio band. This frequency capability is complemented by an impressive output power of up to 25 watts, ensuring robust communication over extended distances. It also includes a built-in automatic repeater shift, which simplifies contacts through repeaters, making it an excellent choice for those looking to enhance their communication range.

In terms of technology, the CT255 employs advanced digital signal processing (DSP), which significantly improves audio clarity and reduces background noise. This makes communication clearer, even in less-than-ideal conditions. Additionally, the transceiver features an array of scanning functions, including memory scan and priority scan, allowing users to monitor multiple channels effortlessly.

The CT255 comes equipped with multiple memory channels, enabling easy access to frequently used frequencies. This feature is particularly useful for users who participate in various nets or have multiple repeaters they commonly contact. Moreover, the unit supports CTCSS and DCS tones, which adds an extra layer of privacy and reduces interference from unwanted transmissions.

Safety and durability are also key characteristics of the CT255. The robust construction ensures it can withstand the rigors of regular use, making it suitable for field operations. It is designed with heat dissipation features to prevent overheating during prolonged use, ensuring reliability during critical communications.

In conclusion, the Ramsey Electronics CT255 is a well-rounded transceiver that brings together advanced technology, user-centric design, and excellent performance. Its range of features makes it an appealing choice for radio amateurs seeking a dependable and efficient communication solution. Whether for casual chatting or emergency communications, the CT255 stands out as a reliable tool that meets the demands of modern radio users.