This experimental circuit with Nixie tube was found in the Radio Electronics magazine of March 1969. The circuit serves for demonstrations and also for testing these digital indicator tubes.
This circuit is from 1998 documentation. The coils consist of the number of turns indicated on...
This shield circuit was found in an American publication from the 80's. The triac is of low...
This amplifier with gains between 5 and 100 was found in the May 1988 issue of Radio Electronics...