Title:
マスター・ボリューム
Document Type and Number:
Japanese Patent JP4165902
Kind Code:
B1
Abstract:
A master volume can be added to a circuit included in a vacuum tube amplifier apparatus, such as a guitar amplifier apparatus etc., without troublesome modification, such as soldering to the original circuit included in the amplifier apparatus, boring a chassis in the amplifier apparatus, or the like. Concretely, a master volume can be added to a circuit included in a vacuum tube amplifier apparatus by inserting or sandwiching adaptor 53 between socket 8 for a power amplification circuit and vacuum tube 21 for the power amplification circuit, and inserting or sandwiching adaptor 54 between socket 9 for the power amplification circuit and vacuum tube 22 for the power amplification circuit, in a power amplifier included in the vacuum tube amplifier apparatus. Alternatively, an adaptor may not be attached between the vacuum tube socket for the power amplification circuit and the vacuum tube for the power amplification circuit but may be attached between a vacuum tube socket and a vacuum tube in a phase inversion circuit portion.
Inventors:
Motoaki Shimizu
Application Number:
JP2008103157A
Publication Date:
October 15, 2008
Filing Date:
April 11, 2008
Export Citation:
Assignee:
Motoaki Shimizu
International Classes:
H03G7/02; H01R33/74; H03F3/181
Domestic Patent References:
| JP2004072303A | ||||
| JP2007207449A | ||||
| JP8288039A | ||||
| JP11329232A | ||||
| JP2007087965A | ||||
| JP37017332B1 | ||||
| JP2002078070A | ||||
| JP2007282169A | ||||
| JP56030392U | ||||
| JP7104756A | ||||
| JP2005287005A | ||||
| JP9307386A | ||||
| JP4227398A |
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