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A high-performance RF amplifier designed for the entire VHF broadcast and PMR band (100-175 MHz) that can be constructed without the need for specialized test equipment. The grounded-gate configuration offers inherent stability without requiring neutralization, provided that appropriate PCB...
The bright channel of the Vox AC30 Top Boost preamp begins with a traditional 12AX7 preamp connected to a volume control with a bright bypass capacitor. This is followed by two more stages to prepare the signal for the...
The low-cost Mini-Circuits MAR-X series of chips provides a significant advantage for RF builders, featuring inherent 50-ohm input and output impedances essential for RF systems. An MAR-1-based receiver/scanner preamplifier is illustrated. Capacitors Ci and C2 are chip capacitors, with...
A fundamental component for audio applications, this circuit functions as a general-purpose preamplifier. It is recommended to utilize two circuits for stereo configurations. This audio preamplifier circuit is designed to amplify low-level audio signals, making it suitable for a variety...
An NE592 or LM733 is utilized as a general-purpose video amplifier in this schematic. J2 and J3 deliver two anti-phase outputs. R2 functions as a gain control. The bandwidth is approximately 100 MHz. The NE592 and LM733 are operational amplifiers...
The circuit described is a single JFET design that provides limited gain. By incorporating a source resistor bypass capacitor, the gain can be significantly enhanced, resembling a single stage of the original tube preamp used in guitar amplifiers. It...
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