The **FVF-60-R/Q** typically refers to a specialized series of **high-voltage, high-frequency focus resistors** or divider networks used primarily in CRT (Cathode Ray Tube) displays, medical imaging, and precision high-voltage power supplies. Below is a breakdown of the electronic characteristics and technical specifications of this component. --- ### 1. Technical Specifications The following table outlines the general electrical parameters typical for the FVF-60-R/Q series: | Parameter | Specification | | :--- | :--- | | **Component Type** | High-Voltage Resistor / Focus Potentiometer | | **Max Operating Voltage** | 30kV - 40kV (DC) | | **Resistance Tolerance** | ±5% to ±10% | | **Power Rating** | 1.0W - 2.5W (Typical) | | **Insulation Resistance** | >100MΩ at 500V DC | | **Dielectric Strength** | 10kV AC for 1 minute | | **Operating Temp** | -10°C to +70°C | --- ### 2. Electronic Composition The FVF-60 series is constructed using specific materials to handle extreme electrical stress: * **Thick Film Technology:** The resistive element is usually a metal-oxide or cermet film fired onto a high-purity alumina ceramic substrate. This provides stability under high voltage. * **Encapsulation:** The internal parts are housed in a flame-retardant (UL 94V-0) plastic case and encapsulated with high-dielectric epoxy resin to prevent arcing and corona discharge. * **Integrated Bleeder:** Often includes a bleeder resistor circuit to discharge residual high-voltage capacitors safely when power is removed. --- ### 3. Pinout and Circuit Function The "R/Q" designation often refers to the terminal configuration or the specific curve of the focus adjustment. * **Input (HV):** Connects to the main High Voltage anode supply (Flyback transformer). * **Focus Output:** Provides a variable voltage (usually 20-30% of HV) to the focus electrode of the CRT. * **Screen (G2) Output:** Provides a lower variable voltage (accelerating grid) for brightness control. * **Ground:** Connection to the common chassis ground for the divider network. ### 4. Typical Applications 1. **Monochrome/Color Monitors:** Used for beam focusing in high-resolution CRT displays. 2. **X-Ray Equipment:** Used in the voltage regulation of imaging tubes. 3. **Laboratory Equipment:** Employed as a precision divider for high-voltage measurement. ---