P1 on this Radio Shack circuit is a 6 V lamp with current up to 500 mA depending on Q2. The frequency is given by C1 which can have a modern standard value such as 3.3 uF or even 4.7 uF.
Antenova Grandis antennas can be purchased from Mouser Electronics for frequencies from 868 MHz to...
This circuit is from a specialized documentation in 1992 FETs. The L1 coil has 0.07 uH with...
This circuit makes use of germanium transistors, providing a fraction of a watt power. It was...