Abstract: Isolation is provided to two signal sources whose output signals are combined by the use of an outphasing technique. A first divider divides the signal from a first signal source into two signals and a second divider divides the signal from the second signal source into two additional signals. A first output of the first divider and a first output of the second divider are connected together by an attenuator and delay line which is used to cancel the leakage across a hybrid combiner. A second output of the first divider and second divider is applied to the hybrid combiner where the two signals are combined to obtain a combination signal that has enhanced isolation.

Abstract: In a hydrogen cooled dynamoelectric machine, an ion chamber detector monitors thermally produced particulates. Specificity and sensitivity of the ion chamber detector are improved by applying an electrical potential of a limited predetermined range to the electrodes of the detector and operation of the detector occurs within a well defined subsaturation range.