I wanted to relate how I am feeling that this Joule Ringer 2.0 circuit is looking more and more like something related to the illusive Dr. Stifflers SEC devices, and how they may not be as easy to "tune" as we might think.
We were hoping that the hand wound E-core ferrite transformer and single 2n3055 transistor would be a cinch to make, but, so far nobody has been able to replicate it, even using the same parts. 10 led bulbs = 200mAs draw. Why???
The circuit configuration is unusual. It's an example of
a "curiosity" than can be made to work with a lot of
tinkering but which in reality offers no advantage over
the more conventional circuitry.
Placing the "load" in the Base Drive portion of the circuit
is an approach that will be extremely difficult to control
and/or to adapt to various loads. There are far better, easier
and more reliable ways to develop the properly shaped and
polarized base drive signal for most efficient switching.
As an example, the Horizontal Output Transformer of the old
style TV set is a pretty good approximation of the Joule Ringer
circuit for high power output. If it is possible to obtain a
schematic diagram for an old transistor TV set zero in on the
Horizontal Output Transistor and how it is driven at its Base.
For maximum efficiency the transformer used must have
A Primary driven by the Transistor,
A Secondary to supply power to the Load,
A low voltage secondary which is dedicated to
providing feedback and drive to the Base of the
Capacitors are often used across the primary and/or
secondary windings to reduce flyback transient magnitude
and this will often significantly decrease heating of the power
transistor. The capacitors are small so that the resonance
of the windings will be a frequency much higher than the
operating frequency of the oscillator.
To make an oscillator for powering lamps with just an
ordinary two winding transformer perhaps the "Stingo"
circuit of Sucahyo's would be the best way to go.
“When an honest man realizes that he is mistaken, he will either cease being mistaken or cease being honest.” –Anonymous