De la Warr type instruments are characterized by a magnetically energized circuit, and the 0-10 indexed tuning system devised around the early 1900’s by Drs. Albert Abrams and Ruth Drown. Distinctive features include metal specimen wells, rotary resistors (potentiometers) 9 to 12 in number and the tactile “stick plate” described on the Introduction page. Auxiliary input and output sockets allow respectively for admixture of radiations intrinsic to material reagents, or imprinting a neutral carrier medium with dial-tuned activity.

The De la Warr Mark IV is one of the most iconic and enduring designs

Design Analysis

The “broadcaster” is a paired-down version of the hinged-case model shown above. It utilizes the same arrangement of variable resistors (potentiometers) found to this day in most instruments of this type. The wells are substituted by a flat metal plate. For propagation, the tuned output is conducted to the planetary field via a grounding wire. A stick plate for analytical work was sold as an optional plug-in. The top knob is to be rotated for nodal interfacing with ambient fields. It is affixed to a vertical rod magnet. From a slip ring at its center (Bloch wall), the nine potentiometers are connected according to their order of tuning.

The dots above correspond with similarly colored cells in the table below. In total, the column headings span a range of prospective functional stages. Beneath each is a column of design choices associated with this type of instrument. While retaining consistency of purpose, some can be interchanged with those on the Hieronymus page.

Click on image to enlarge. Gray shading indicates the minimum practical componentry for a complete device. “Pot” is tech shorthand for potentiometer. “Cap” for capacitor
Consistency of form and function between early split ring tuners and potentiometers

Sample Circuit

The diagram below includes the option of an LED, proposed to further enliven the circuit. Optionally driving it with an oscillator can serve as an emphatic “interrupter”, or sympathetic entrainment with the operator. The witness is sandwiched beneath a steel disk directly within the Bloch wall, with the aforementioned rotation allowed by twiddling the top magnet. According to precedent, the final tuner may be enlisted as an “intensity” readout when performing quantitative analysis of an existing condition via the stick plate.

Click on image to enlarge


The images below showcase the sustained evolution of the 0-10 tuning system. Where populated circuit boards are in evidence, their purpose is most often amplification or pulse generation.

Vibrational Transfer

For experimental or training purposes only, such instruments can also generate a “homeopathic” simulant of any dialed-in rate. This is done by nominating the last dial as a “potency” setting and matching the degrees of rotation indicated below. A neutral carrier, traditionally sugar pilules or 2-3% vodka in distilled water, is then placed upon the stick plate for several minutes.