Oil cooled multistage depressed collector high power amplifier

A method for cooling a high power amplifying device including a multistage depressed collector (MSDC) having a plurality of collector electrodes, the method comprising the steps of:

• providing a heat-exchanger including
• a cooling fluid passageway in thermal contact with an oil-based fluid passageway,
• a cooling fluid within said cooling fluid passageway, wherein said cooling fluid absorbs thermal energy from an oil-based fluid in said oil-based fluid passageway,
• a cooling fluid heat exchanger connected to said cooling fluid passageway for removing thermal energy from said cooling fluid,
• a cooling fluid tank functioning as reservoir and for accommodating thermal expansion of said cooling fluid, and
• a cooling fluid pump connected to the cooling fluid passageway to circulate the cooling fluid;
• thermally connecting one or more collector electrodes of the MSDC of the high power amplifying device to said oil-based fluid that removes thermal energy from the collector electrodes of the MSDC of the high power amplifying device;
• circulating the oil-based fluid through the oil-based fluid passageway to said heat exchanger and
• removing the thermal energy from the oil-based fluid in the heat exchanger.

An oil-cooled high power amplifier system comprising:

• a high power amplifying device;
• a hollow fluid passageway thermally connected to the high power amplifying device;
• an oil-based fluid contained in the fluid passageway, wherein the oil-based fluid removes thermal energy from the high power amplifying device;
• an oil pump connected to the fluid passageway to circulate the oil-based fluid;
• and
• an oil heat-exchanger connected to the fluid passageway for removing the thermal energy from the oil-based fluid, said oil heat-exchanger including
• a cooling fluid passageway in thermal contact with said hollow fluid passageway;
• a cooling fluid within said cooling fluid passageway, wherein said cooling fluid absorbs thermal energy from said oil-based fluid;
• a cooling fluid heat exchanger connected to said cooling fluid passageway for removing thermal energy from said cooling fluid;
• a cooling fluid tank functioning as a reservoir and for accommodating thermal expansion of said cooling fluid;
• and
• a cooling fluid pump connected to said cooling fluid passageway for circulating said cooling fluid within said cooling fluid passageway.