Manufacturers

Beam Tube Corp 6390

This tube was produced for U.S. military applications, particularly the U.S. Navy (USN), during the mid-20th century. Key Specifications and Description Type: Reflex klystron (a specialized vacuum tube that generates or amplifies microwave signals by reflecting a portion of the … Continue reading →

Raytheon RK5721

The Raytheon RK5721 is a vintage reflex klystron microwave tube, primarily designed for use in radar and SHF/EHF applications (frequencies above 3 GHz). It features a special tube base and is noted for its external cavity design, allowing tunability for … Continue reading →

Polarad ZV1011 Velocitron

The Polarad ZV1011, nicknamed the “Velocitron”, is a reflex klystron vacuum tube manufactured by Polarad Electronics Corporation, a U.S. company active in the 1940s-1960s known for RF/microwave test equipment and components. Overview Type: Reflex klystron (external cavity). Purpose: Used for … Continue reading →

Samsung SGH-A837 Rugby

Samsung SGH-A837 Rugby Specifications The Samsung SGH-A837, known as the Rugby, is a rugged flip-style feature phone released in 2008 for AT&T’s network. It was designed for durability in tough environments, meeting military-grade standards, and supports push-to-talk (PTT) functionality. Below … Continue reading →

Seagate Barracuda ST1000DM003

Seagate Barracuda ST1000DM003 Specifications The Seagate Barracuda ST1000DM003 is a 1TB 3.5-inch internal hard disk drive (HDD) from the Barracuda 7200.14 series, released in Q4 2011. It is designed for desktop PCs and features high-capacity storage with 7200 RPM performance, … Continue reading →

Vectronics VEC-512

Tune up your antenna tuner without transmitting a single milliwatt! You cant cause QRM — theres no radiated power. Precisely tune your antenna tuner for a 1:1 SWR — no additional “tweaking” needed. Protect your transceiver and antenna tuner. Avoid … Continue reading →

Keithley Model 168 Autoranging DMM

Keithley Model 168 Autoranging Digital Multimeter Technical Description Overview The Keithley Model 168 is a versatile, 4-digit autoranging digital multimeter (DMM) designed for precise measurements of AC/DC voltage, AC/DC current, and resistance. Introduced in 1974, this compact, tabletop instrument is … Continue reading →

Tektronix 2225 Oscilloscope

  Tektronix 2225 Oscilloscope Technical Description Overview The Tektronix 2225 is a rugged, lightweight, dual-channel analog oscilloscope designed for precise signal analysis with a bandwidth of 50 MHz. Featuring a compact design and a high-quality 80 x 100 mm cathode-ray … Continue reading →

Kenwood MA-4000 Duplexer

The Kenwood MA-4000 is a high-performance diplexer/duplexer engineered for amateur radio applications. It facilitates simultaneous operation on the 2-meter (144–148 MHz) and 70-centimeter (430–440 MHz) VHF/UHF frequency bands. This device enables a single dual-band transceiver to interface with separate VHF … Continue reading →