Ramsey Electronics Parts Supplied with Your CT255 KIT, Capacitors, Resistors, Semiconductors

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PARTS SUPPLIED WITH YOUR CT255 KIT

Capacitors

ˆ4 .1 µF disc capacitor (marked .1 or 104 or 100 nF) [C3,4,5,6]

ˆ1 1 µF electrolytic capacitors [C1]

ˆ2 10 µF electrolytic capacitors [C2,7]

ˆ1 470 µF electrolytic capacitor [C8]

Resistors

ˆ8 390 ohms (orange-white-brown) [R5,6,7,8,9,10,11,12]

ˆ1 1K ohms (brown-black-red) [R39]

ˆ13 10K ohms (brown-black-orange) [R2,3,4,17,19,21,26,29,30,33,

34,36,40]

ˆ10 20K ohms (red-black-orange) [R13,14,16,18,20,25,28,32,35,38]

ˆ1 47K ohms (yellow-violet-orange) [R1]

ˆ1 100K ohms (brown-black-yellow) [R15]

ˆ1 1M ohms (brown-black-green) [R24]

Precision Resistors (with five color code bands or SMT)

ˆ1 1K ohms (brown-black-black-brown) [R37]

ˆ1 1.43K ohms (brown-yellow-orange-brown-brown) [R27]

ˆ1 1.82K ohms (brown-gray-red-brown-brown) [R23]

ˆ1 4.22K ohms (yellow-red-red-brown-brown) [R31]

ˆ1 10K ohms resistor (brown-black-black-red-brown) [R22]

Semiconductors

ˆ1 1N4002 diode (black with gray band) [D10]

ˆ1 1N4148 diodes (small glass diodes) [D9]

ˆ8 JUMBO Green LED [D1-8]

ˆ1 7805 +5 volt voltage regulator [VR1]

ˆ1 LMC660 Quad Rail to Rail Op-Amp (14 pin DIP) [U1]

ˆ1 74HC393N IC (14 pin DIP) [U2]

ˆ1 LM35DZ Precision Temperature Sensor IC (3 lead TO-92) [U3]

Miscellaneous Components

ˆ2 Three pin header [H1-2]

ˆ2 Two pin header jumper

ˆ1 2.1 mm power jack [J2]

ˆ1 PC mount stereo jack

CT255 15

Image 15
Contents Computemp 255 Binary Thermometer KIT Ramsey Transmitter Kits KIT Assembly Introduction CB B OA RD in CA SEBinary counter Circuit DescriptionDAC Digital to Analog Converter ADC Analog to Digital Converter? In a sense…Scaling to Celsius Oh that extra count More on the ADCHow the counter oscillator works Restarting the conversion cycleFor the complicated Fahrenheit design CT255 Binary math Bit # Value 128 Some random parts, and what they do CT255 Schematic Diagram CT255 Parts Layout Diagram Semiconductors Parts Supplied with Your CT255 KITCapacitors ResistorsEnough of that ... let’s get started Ramsey LEARN-AS-YOU-BUILD KIT AssemblyCT255 Thermometer Assembly Instructions CT255 CT255 CT255 Front View LM35DZ Congratulations Assembly Instructions for Custom CaseUSE of Your Computemp Still Having TROUBLE? Troubleshooting GuideConclusion Ramsey Kit Warranty Fishers Station Drive Victor, New York Phone 585 Required ToolsAdditional Suggested Items Ramsey ELECTRONICS, INC

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.