This transmitter for the 3.5 and 7 MHz ham radio was found in a 1950s Japan publication. No information was given on the coils and the power supply.
July 2017 - The new touch switches from Alps SKPS series for surface mounting can now be purchased from...
We found this circuit in the November 1992 Radio Electronics magazine. It works with both...
This circuit allows fluorescent lamps to be powered up to 40 W from 12 V car batteries. The...