
( Brand: Sensitive Research Corporation ), ( Manufacturer Part Number: CEW-7 )
The Sensitron Research Cew-7, manufactured by Sensitron in 1963, is a vintage test instrument that was widely used in the electronic industry for measuring and analyzing capacitance and impedance. This instrument is a valuable piece of historical equipment that showcases the advancements in test and measurement technology during the mid-20th century.
The Cew-7 is a versatile bridge type capacitance and impedance meter designed to measure capacitance values ranging from 1 pF to 2000 pF and impedance values up to 10 Megaohms. The instrument features a high-precision bridge circuit that utilizes a 100 kHz oscillator for superior frequency response and accuracy. The bridge circuit is designed to be balanced manually using fine adjustment knobs, allowing for precise measurement of capacitance and impedance values.
The front panel of the Cew-7 is well-designed and intuitive, with clear labeling of all controls and indicators. The instrument includes a built-in attenuator that provides a range of input voltages from 10 mV to 1000 mV, allowing for accurate measurements on a wide range of components. The output voltage can be adjusted using a variable voltage control knob, and the instrument includes a peak hold function to capture the maximum value during an AC measurement.
The Cew-7 also includes several useful features for troubleshooting and diagnosis, such as a built-in bridge null indicator that helps to achieve a balanced bridge condition quickly and accurately. The instrument also includes a frequency response display that shows the impedance magnitude and phase angle as a function of frequency, allowing for analysis of capacitance and impedance behavior over a wide range of frequencies.
The instrument housing is made of high-quality aluminum with a durable black anodized finish. The front panel is protected by a clear acrylic cover that helps to shield the instrument from dust and other contaminants. The Cew-7 is powered by a 115V AC or 230V AC input, and includes a detachable three-prong power cord.
In summary, the Sensitron Research Cew-7 is a rare and valuable piece of electronic test equipment that offers precise and accurate measurements of capacitance and impedance. Its intuitive design, versatile features, and historical significance make it a must-have for electronic hobbyists, collectors, and professionals in the field of electronic test and measurement.
The CEW-7 (Communications-Electronics Research, Development and Engineering Center Model 7) is an obsolete military computing system developed by RCA (Radio Corporation of America) in 1963. While it holds historical significance in the field of computing, considering a purchase of this system today comes with several pros and cons.
Pros:1. Historical Significance: The CEW-7 is a significant piece of computing history. Owning one could provide valuable insights into the evolution of computing technology.
2. Learning Opportunity: For individuals interested in vintage computing, restoring and operating the CEW-7 could be a rewarding learning experience.
3. Collection Value: As a collector's item, the CEW-7 could potentially increase in value over time.
Cons:1. Obsoleteness: The CEW-7 is over 60 years old, making it extremely obsolete. It is not designed to run modern software or connect to modern networks.
2. Maintenance and Repair: Given its age, parts for the CEW-7 may be difficult to find, making maintenance and repair costly and time-consuming.
3. Compatibility: The CEW-7 uses outdated hardware and software, making it incompatible with most modern systems and peripherals.
4. Energy Consumption: The CEW-7 is a large, power-hungry system. Operating it could result in high electricity bills.
5. Safety Concerns: The CEW-7 was designed for military use and could contain hazardous components. Proper handling and disposal are essential.
Conclusion:The CEW-7 is an intriguing piece of computing history, but its age and obsoleteness make it a challenging and costly proposition for modern use. While it could provide a valuable learning experience or serve as a collector's item, the practical applications are limited.
Recommendation:Instead of investing in the CEW-7, consider supporting historical computing organizations or museums that preserve and exhibit similar systems. Alternatively, explore modern vintage computing options, such as emulators or refurbished systems, that offer the historical experience with the added convenience of modern functionality.
VINTAGE Sensitive Research Instrument Corporation model CEW-7.