Abstract A thermo-electric transistor mounting fixture is provided, using a mounting fixture/heat sink, a beryllium oxide washer, brass spacer, emitter ground pin socket and nylon hold down screws. The mounting fixture provides a design in which the transistor is held in physical contact and alignment with the spacer and insulating washers. Thermal conduction and transfer of heat is accomplished through the application of thermal joint compound between the interfacing surfaces of the washers. The important electrical feature is the elimination of emitter lead length problems by grounding the emitter in the chassis/Faraday shield with the shortest possible lead length with an integral grounding pin. The brass spacer is slotted to allow exiting of the collector lead and facilitating its connection to the collector circuit. The beryllium washer provides required electrical and RF insulation from ground. The combination of the above features provide an effective and efficient high frequency transistor mounting fixture.
A structure for mounting a high frequency case type transistor comprising: an electrically and heat conductive mounting plate; a pin receptacle adapted to receive an emitter lead received within an aperture in said plate and electrically connected thereto; a berylium oxide washer mounted on said plate and having an aperture therein in axial alignment with said plate aperture; a metal mounting fixture having a hollow cylindrical portion adapted to receive a transistor case, and electrically insulating fasteners securing said mounting fixture to said plate.
Claim 2
Dependent Claim
84 words
A structure for mounting a high frequency case type transistor comprising: an electrically and heat conductive mounting plate; a pin receptacle adapted to receive an emitter lead received within an aperture in said plate and electrically connected thereto; a berylium oxide washer mounted on said plate and having an aperture therein in axial alignment with said plate aperture; a metal mounting fixture having a hollow cylindrical portion adapted to receive a transistor case, and electrically insulating fasteners securing said mounting fixture to said plate.
Claim 3
Dependent Claim
30 words
The mounting structure of claim 1 wherein the surfaces of said mounting fixture are provided with an anodized layer to permit heat conductivity and provide electrical insulation with said transistor.