Jack C Sondermeyer

6515859, Feb 4, 2003

Jun 11, 2001

09/877137

John H. Roberts - Hickory MS
Ronald David Goss - Meridian MS
Jack C. Sondermeyer - Meridian MS

Peavey Electronics Corporation - Meridian MS

H05K 720

361695, 361692, 361704, 165 802, 16510433, 257717

A heat sink alignment apparatus having an internal chamber with a plurality of heat sinks placed at an angled relationship to one another creating a tunnel through which air streams flows. At least one heat source is attached to a heat sink. A plurality of air streams enter the heat sink alignment apparatus through an ambient air intake and over a fan into the tunnel. The tunnel gradually narrows thereby increasing the velocity of the air streams which increases the cooling of the heat source. The narrowing shape of the tunnel creates turbulence within the plurality of air streams increasing the transfer of heat to various airstreams from the heat sink thereby lowering the temperature of the heat sources also.

56756569, Oct 7, 1997

Jul 15, 1996

8/668501

Jack C. Sondermeyer - Meridian MS
James W. Brown - Meridian MS

Peavey Electronics Corporation - Meridian MS

H03G 300

381 61

In a power amplifier, a control device employing a dual ganged potentiometer is connected in the feedback circuits of successive amplifier stages to increase the gain of the front end stage while simultaneously reducing the gain in a subsequent stage when the control is turned down. A distortion circuit, such as a tube compression circuit, is coupled between the stages. When the control is turned down, the compression circuit is activated at a lower level that effectively reduces the output power of the second stage. Presence and resonance controls may be provided to tailor high and low frequency damping factor of the second stage and function until the compression circuitry is activated. A ripple reduction filter is provided in a filtered supply for the drivers in the second or power amplifier stage.

51310449, Jul 14, 1992

Jun 13, 1990

7/537993

James W. Brown - Meridian MS
Jack C. Sondermeyer - Meridian MS

Peavey Electronics Corporation - Meridian MS

H03G 300

381 61

The present invention employs gain compensation such that when the amplifier is in the clean mode, the gain is at a selected level and when the amplifier is in the lead mode gain is decreased. In one embodiment a selectable brightness control is employed to raise the high frequency response in the clean mode. In another embodiment, a selectable gain boost control is employed to increase the gain in the lead mode. At least one frequency selectable means is provided in a post distortion stage output circuit for varying the frequency response of the output in the lead mode.

53878760, Feb 7, 1995

Dec 20, 1993

8/169353

Jack C. Sondermeyer - Meridian MS

Peavey Electronics Corporation - Meridian MS

H03F 338
H03F 326

330251

An amplifier switchably operative in a plurality of voltage modes depending upon the level of the input signal is disclosed. A circuit for each voltage mode includes a common driver for each level and a plurality of output devices arranged in parallel. Each output device is operative at a selected voltage level and is coupled to the common driver for the corresponding voltage mode. One output device of each level is coupled in series to an output device of the next lower level. A switching diode circuit is coupled between series connected outputs of each output device. In one embodiment, paired diodes are coupled to each level in a common terminal of the diodes are coupled to the input. A regulator is provided for causing the driver and the output devices of each next higher level to turn on prior to the input signal achieving a selected voltage level. The circuit thus provides smooth switching between levels with reduced distortion.

55240550, Jun 4, 1996

Jan 18, 1994

8/182493

Jack C. Sondermeyer - Meridian MS

Peavey Electronics Corporation - Meridian MS

H03G 308

381 61

A solid state amplifier for emulating the compression associated with an overbiased class-B push-pull tube amplifier at high input signal levels due to the flow of current into the grid of the output tubes resulting in a desirable output clipping characteristic with crossover distortion is disclosed. The invention includes at least one pair of class-B connected solid state devices, each having an input circuit and an output circuit. The output circuits are connected for mixing. A biasing element in the input circuit of each paired solid state device establishes a clipping level offset at the input circuit and at the output circuit of each device. A clipping element in the input circuit and the output circuit clips the offset at the input circuit and clips the offset at the output circuit of each respective solid state device. A charging element overbiases the offset in the input circuit whenever the input signal is greater than the input clipping element. The overbiasing causes crossover distortion for emulating the desirable compression associated with a tube amplifier.

42903351, Sep 22, 1981

Feb 25, 1980

6/124470

Jack C. Sondermeyer - Meridian MS

G10H 102

84 127

A high frequency roll-off circuit for a gain stage including an amplifier having a feedback network together with a dual potentiometer comprising two serially connected gang operated resistors connected between the amplifier feedback port and through a capacitor to the amplifier output port, one of the resistors forming a volume control and the other resistor forming a high frequency roll-off control whereby at high volume settings, high frequency roll-off is automatically provided.

50239155, Jun 11, 1991

Aug 24, 1989

7/397875

James W. Brown - Meridian MS
Jack C. Sondermeyer - Meridian MS

Peavey Electronics Corporation - Meridian MS

H03F 134
H03G 302

381120

Separate audio amplifier channels are provided with separate input signal level controls so that the output of one channel is unaffected by the input signal level of the other channel, and vice versa. A switch controls selection of the desired channel. Three channels also be provided and first and second switches control selection of any one of the three channels. As before, separate input signal level controls are provided for the three channels so that each is unaffected by the signal level control of either of the others. Two channels may be distortion channels, each with an input level control and also with an output level control. One channel may be a clean sound channel.

56470045, Jul 8, 1997

Jan 10, 1994

8/179546

Jack C. Sondermeyer - Meridian MS
James W. Brown - Meridian MS

Peavey Electronics Corporation - Meridian MS

H03G 300

381 61

A multi-stage solid state amplifier emulates the distortion associated with grid current flow in a multi-stage tube amplifier by means of a clipping device in the circuit between each series connected stage. In a particular embodiment, each stage includes a field effect transistor (FET) and the clipping device is a diode.