Musical instrument preamplifier
US8542848B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Aug 10, 2008 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Jan 21, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H3/187
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention provides embodiments of a musical instrument preamplifier. It is especially suited to acoustic and electric guitars and basses. All components, including the power source, are contained within or on the body of the instrument. The preamplifier dubbed BPTD (for Battery Powered Tube Driver) contains a vacuum tube input stage and may utilize a second stage consisting of either a vacuum tube or semiconductor device, such as a JFET. Circuitry is included to bias the cathode heater and the preamplifier circuit with no dangerous high voltages present. The tube may be mounted on the instrument body to provide for a pleasing display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.