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"tuned" spark having a distinct note of good quality.
The Transformer and Inductance to ve protected against injury by induced effects from the High Frequency Circuits by means of Air Core Protecting Choking Coils.
CONDENSER BATTERY.
To consist of a bank of 60 units of the self insulating glazed Ironstone container type with oil sealed lide and high tension terminala. Each cell to be filled with special high flash point insulating oil. The Units of the Bank to be suitably grouped to afford that capacity which, in conjunction with the variable Induc- tance of the High Frequency Primary Cirouit will give the required
The arrangement of the Con- range of wave lengthe in transmission. densers to be also such as to ensure the absorbtion of the total amount of energy to be supplied by the Transformer Circuit without bringing any undue electrical strain on the individual Condenser
The Battery to be provided
Calls and with the minimur: heat lossen. with a Set of Bus Bar Connectors and Insulating Separators for con- nooting up the Condenser Battery to other parte of the High Frequency
Primary Circuit.
DISCHARGER.
The Discharger to be of the Marconi Dise Type designed for producing a musical note of good quality and even tone in transmis– sica, consisting of a steel diso with radial copper atuds rotating The Disc at a high speed between adjustable revolving electrodes,
to be direct coupled to the Shaft of the Motor Alternator Set by means of a special flexible insulating coupling and to be furnished with all necessary fittinge and accessories.
TRANSHITTING JIGGER AND AFRIAL TUNING INDUCTANCE.
The Transmitting Jiggar to be of the open type with independent primary and secondary circuite, having a Wultiple Turn Primary oon- structed of independently insulated copper cable laid up so as to provide for equal distribution of current throughout the section, and & Multiple Turn Secondary of similar cable out of smaller sec-
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