Abstract: A dual rate transmitter may include a modulator circuit configured to modulate orthogonal signals to generate a quadrature modulated signal. An amplifier may be configured to amplify the quadrature modulated signal to produce an amplified signal. A quadrature partial response (QPR) filter may be configured to process the amplified signal to generate an output signal. The QPR filter may allow for full rate QPR and half rate QPSK operation of the transmitter device. The output signal may be transmitted via an antenna. This transmitter approach provides a bandwidth efficiency improvement, as the QPR signal may be operated at twice the rate within the same bandwidth as the quadrature modulated signal using a common saturated transmitter implementation, reducing quantity of components and the resulting mass and cost reduction for a space transmitter solution. Additionally, this approach of using QPR signaling provides greater power efficiency.

Abstract: A golf putter has a putter head having forward, rearward, top and bottom surfaces, and opposite ends. A cavity opening is centrally located in the top surface of the putter head. An elongated shaft with a ball on the lower end thereof extends into the cavity. A detent on the ball engages a detent in the bottom of the cavity to prevent the longitudinal axis of the golf shaft from forming an angle of less than 10 degrees with a vertical axis extending upwardly from the cavity and the putter head. The shaft is locked within the putter head by three screws. Two opposite screws extend into the cavity from a threaded longitudinal bore which extends through the putter head. A second transverse screw extends into the cavity through the putter head. When tightened, the three screws mechanically lock the ball on the lower end of the shaft in the desired position.