Battery, resistor, ground on tuning fork is to run simulator and better show tuning fork. Mounted tuning fork has only magnetic connection with electromagnets (coils) parallel to tuning fork arm. B+ voltage to 6J5 High- Mu Triode when powered on starts tuning fork moving and gradually our electrically driven tuning fork "tank circuit" grow very stable and exceptional quality sine waves.
A. C. Generator is to show signal after electrical oscillator becomes stable.
The High -Mu metal is nickel and iron alloy used to shield against static or low frequency magnetic fields.
The 6J5 tube heater not shown is 6.3 volts at .3 amp.
