This amplifier for the 10 m (30 MHz) band has a gain of 12 to 15 dB having been found in an American documentation. Other RF transistors can be used like 2N2222 or 2N2218.
This circuit is from an old American documentation using as indicators for the flip-flops neon...
This stereo circuit is from Japanese 1960 documentation. The circuit was originally designed to...
This circuit is from the 1983 Intersil Databook. The display is plasma and must be excited by a...