This circuit is from an 80's publication. It makes use of small 6 V x 50 mA incandescent lamps. The diodes can be general purpose or even 1N4002. The transformer is 6.3 V with 100 mA or more current.
Found in a 1980s documentation, this circuit uses as base a component of the era. The formula for...
For the 600 kHz range coil is formed by 35 turns of 28 AWG wire on a ferrite core with a diameter...
Found elsewhere in this section, but from other sources, this circuit is from a 1964 Electronic...