In-Circuit Tester for SCR, Diodes, and Transistors

The circuit has been constructed to provide an in-circuit system that will test the integrity of electronic components such as Silicon Controlled Rectifiers, diodes, and PNP or NPN transistors.

High Selective Regenerative Shortwave Receiver

The circuit was designed to create a portable and sensitive regenerative receiver that will be suitable for shortwave band listening.

High Power FM Wireless Microphone

This one is a high power FM wireless microphone that provides very good frequency stability in about 1km range and very good microphone sensitivity. It can be used inside guitars, as a part of remote control systems or in other similar applications.

88-108 MHz VHF FM Band Preamplifier by 2N3819 FETs

This circuit is a VHF (Very High Frequency) preamplifier for the band two spectrum tuning approx. 88 - 108 MHz.

Voice Transmitter via Frequency Modulation

The circuit is designed to establish a voice transmitter by means of frequency modulation band.

Whip Antenna Operating At Medium Wave Frequency

Designing the circuit for this antenna to be telescopic makes it collapsible where it can be extended to its full length or retracted to a small length for storage portability. It may consist of a series of small diameter tubes of 6 to 8 inches in length nested one inside the other.