Crt Clock Schematic ((top)) Jun 2026

: Small vacuum tubes (like the EF80) or high-voltage transistors (like the

Note: Old TV tubes require 15kV. Do not use TV tubes for desk clocks. Crt Clock Schematic

No CRT clock schematic is complete without the daunting high-voltage (HV) section. Unlike a TV, a small oscilloscope tube does not require 15kV, but it still needs roughly 1,000 to 1,500 volts on the anode to accelerate electrons to sufficient speed. The schematic will show one of two topologies: : Small vacuum tubes (like the EF80) or

The cornerstone of the schematic, converting low-voltage DC (often 12V) into high voltage ( but it still needs roughly 1