GB2458411A - Electronic bass register musical instrument tube preamplifier - Google Patents
Electronic bass register musical instrument tube preamplifier Download PDFInfo
- Publication number
- GB2458411A GB2458411A GB0912323A GB0912323A GB2458411A GB 2458411 A GB2458411 A GB 2458411A GB 0912323 A GB0912323 A GB 0912323A GB 0912323 A GB0912323 A GB 0912323A GB 2458411 A GB2458411 A GB 2458411A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- musical instrument
- preamplifier
- tone
- bass register
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 14
- 238000010586 diagram Methods 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 108700038720 Ebip Proteins 0.000 abstract description 7
- 239000007787 solid Substances 0.000 abstract description 2
- 230000001151 other effect Effects 0.000 abstract 1
- 230000002028 premature Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- QVZZPLDJERFENQ-NKTUOASPSA-N bassianolide Chemical compound CC(C)C[C@@H]1N(C)C(=O)[C@@H](C(C)C)OC(=O)[C@H](CC(C)C)N(C)C(=O)[C@@H](C(C)C)OC(=O)[C@H](CC(C)C)N(C)C(=O)[C@@H](C(C)C)OC(=O)[C@H](CC(C)C)N(C)C(=O)[C@@H](C(C)C)OC1=O QVZZPLDJERFENQ-NKTUOASPSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
- G10H1/06—Circuits for establishing the harmonic content of tones, or other arrangements for changing the tone colour
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/14—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means
- G10H3/18—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a string, e.g. electric guitar
- G10H3/186—Means for processing the signal picked up from the strings
- G10H3/187—Means for processing the signal picked up from the strings for distorting the signal, e.g. to simulate tube amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/33—Modifications of amplifiers to reduce non-linear distortion in discharge-tube amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Multimedia (AREA)
- Power Engineering (AREA)
- Acoustics & Sound (AREA)
- Nonlinear Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
Electronic bass register musical instrument tube preamplifier An in-line signal preamplification device which richens the tone of electronically amplified bass register musical Instruments The unit is connected in the signal path between the instrument and the amplifier by the use of a standard 2/4" input jack and a 4/4" output jack Other effects processors may be placed either before or after the preamplifier device There is one volume control and one overdrive switch, which utilizes a variable current source driving section to further reduce distortion and richen the bass register tone The variable current drives the plates of 4/2 of the UAX7 tube with a 48vdc plate voltage in the overdrive position and a 40vdc plate voltage in the normal position Use of the overdrive position causes a premature failure of the 32AX7 tube, so it should be used sparingly The EBIP Is useful for both solid state and tube amplifier applications.
Description
ELECTRONIC BASS REG1S1ER MUSICAL INSTRUMENT TUBE PREAMPLIFIER DESCRP77ON The Electronic Bass Instrument Preamplifier (hereinafter ref eried to as EBIP) Is an audio preamplifier section for electric bass guitar and other amplified bass register musical instruments. The basis for the EBl Invention Is not In the circuit schematic that it uses, but In its use of paper In oil capacitors and In the uSe of these capacitors combined with a modern thin film capacitor In the circuit it uses one half of a.12AX7 tube, and there Is a switch which allo the tube to be overdrlven for a more enhanced effect The Input socket must be isolated from the ground for RR (radio frequency interforencó) reasons.
Paper In oil capacitors have not been manufactured for use by the general public since the 1950'sj but today there has been a resurgence of their use In high end audio equipment. In the following schematic Ci. is. Mylar paper In oil capacitor. -C3 consists of two.47uf copper fell paper In oil capacitors In SerieS. 04 Is a modern "orange drop" capacitor, and 05 is a ceramic disc capacitor.
All resistors are of the 1/2 watt value. The B+ voltage of i.S3vdc Is onfr a typical voltage, and other voltages would work equally aS well with some adjustments to the values of Ri, R2, and R4. A grounded metal box contains the electronic components of the EBIP.
The circuit contains one volume control In Its last stage, and the EBIP Is designed to be placed In the signal circuit between the Instrument and the amplifier.
The heater for tle tube needs 63vdc or 22.6vdc. The heater circuit is not shown In the schematl4 but Is Incorporated herein as is typical In such tube circuits.
The present Invention has been described according to a preferred embodiment thereof. It Is understood that modifications can be applied to the form, disposition, and values thereof without exceeding the scope of the plesent Invention.
BACKGROUND OF THE INVENTiON
In or around 1960 a change In the tone of audio amplifiers was apparent.
The first transistor radios were being mass produced during this period, end a new probess for manufacturing signal capacitors was developed and used. The new capacitors were smaller and easier to mass produce.
Most musical instrument amplifiers were still tube amplifiers at this time, bifth began tÔ iiáthémodern signal capacitors. This did not affectthe tone of musical Instruments In the treble register as much as it did musical lpstruments In the bass register (ag Tone controls an bass guitars so longer changed the tone vera' noticeably, compared to what they would do when playing through an amplifier made before the advent of the new process signal capacitors.
In the late i.960's through the 98O's most musical Instrument amplifiers began to be pmuced as solid state amplifiers. These amplifiers were not an improvement In tone, but an Improvement in manufacturing process. By the 1980's certain amplifier and effects manufacturers began to Introduce 12AX7 tube preamplifier circuits that were fairly efièctive In making the tone of treble register Instruments richer and less distorted. Bass register instruments were not aflócted to the same extent, and new ways of playing the electric bass (eg slap picking etc.) were developed. Furthr development of digital effects processors has to some extent Improved the tone of bass register instruments, and the preamplifier circuits utilized In Kennedy (US Pat. No. 4672671) and Kennedy et at.
(US Pat No. 4644289) whIch make use of two sides of a i2AX7 tube, creates a rlchel and less distorted tone, much In the same way as the EBIP Invention.
The present Invention has been described accowllng to a preferred embodiment thereof, it lsundesstood that modifications can be applied to the bnrj, disposition, and values thereof without exceeding the scope of the EBIP Invention.
Description of Drawings
Flgi. is a diagram of the 9 pIns on a 2AX7 tube looking at It from the bottom. Pins I and 3 connect to the plates, and pIn 2 connects to the grid on one side of the 124X7 tube. PIns 6 and 8 connect to the plates and pin 7 connects to the grid on the other side of the 1W? tube. Pins 45, and 9 connect to the heater filament PI 2 Is a simple schematic diagram of the EBIP.
Claims (6)
- cLAIMS What is claimed 1s This isa very unique device In that It ens the tone of the electric bass guitar, especially In the lower octave and a half on the instrument It Is also very effective for creating a richer tone for other bass register musical Instruments. The use of a combination of paper In oil condensers, as described above, with a modem, mass produced thin film one Is particularly unique.With 5.1. In the overdrive p.sIlion the tone of an electric bass guitar ca,.become much less distorted at louder volumes.I claim: i An electronic bass register musical Instrument tube preamplifier.An In line signal pmampllflcation device with a 2/4" Input connectloii and a output connection, one volume control, and one tube overdrive switch.
- 2. An electronic bass register musical Instrument tube preamplifier, as claimed on claim 2, and further Including the use of paper In oil signal capacitors In combination with a modem thin film "orange drop" styl. capacitor in a 12AX7 preamplifier circuit, as described herein, which rlchens the tone of bass register musical instrument electronic signals.
- & An electronic bass register musical Instrument tube preamplifier, as claimed In claim 2, and further including the use of a tube overdrive switch, which drives the plates at either 4ovdc or 48vdc, to further reduce distortion and richen tone.
- 4. An electronic bass register musical Instrument tube preamplifier, as claimed In claim 1, and further Including a source of DC voltage for drMng the plates of a 12AX7 tube. (L53vdc typicafly)
- 5. An electronic bass register musical instrument tube preamplifier, as claimed In claim 1, and fUrther lncudJng a source of DC voltage for driving the heater in 2,12-of a I2AXT tube. (6.3vdc or 12.Gvdo) ________
- 6.An electronic bass register musical Instrument tube preamplifier, as claimed In claim 1, and further Including a grounded metal box containing the components contained In the schematic diagram herein to ellmlneteRF1.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2007/000762 WO2008085173A1 (en) | 2007-01-12 | 2007-01-12 | Electronic bass register musical instrument tube preamplifier |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0912323D0 GB0912323D0 (en) | 2009-08-26 |
| GB2458411A true GB2458411A (en) | 2009-09-23 |
| GB2458411B GB2458411B (en) | 2012-02-01 |
Family
ID=39608923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0912323.3A Expired - Fee Related GB2458411B (en) | 2007-01-12 | 2007-01-12 | Electronic bass musical instrument tube preamplifier |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2010516171A (en) |
| KR (1) | KR20100014298A (en) |
| CN (1) | CN101933084B (en) |
| GB (1) | GB2458411B (en) |
| WO (1) | WO2008085173A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4701957A (en) * | 1986-11-26 | 1987-10-20 | Smith Randall C | Dual mode music instrument preamplifier |
| US5012199A (en) * | 1989-09-08 | 1991-04-30 | St. Louis Music, Inc. | Multi-stage musical instrument amplifier having distortion modes |
| US6792120B1 (en) * | 1999-02-25 | 2004-09-14 | Jonathan M. Szenics | Audio signal enhancement and amplification system |
| US20040240147A1 (en) * | 2003-05-27 | 2004-12-02 | Shin-Etsu Film Co., Ltd. | Oil-impregnated film capacitor and preparation method thereof |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2405515A (en) * | 1944-09-23 | 1946-08-06 | Philco Radio & Television Corp | Amplifier coupling device |
| US4672671A (en) * | 1984-12-03 | 1987-06-09 | Carter Duncan Corporation | Audio frequency signal preamplifier for providing controlled output signals |
| JP2960223B2 (en) * | 1991-10-09 | 1999-10-06 | 松下電器産業株式会社 | Acoustic capacitor and method of manufacturing the same |
| JP2770277B2 (en) * | 1991-12-20 | 1998-06-25 | 信喜 六倉 | Film capacitor |
| JP3130727B2 (en) * | 1993-12-30 | 2001-01-31 | 松下電器産業株式会社 | Power Amplifier |
| JPH0897097A (en) * | 1994-09-21 | 1996-04-12 | Sanyo Electric Co Ltd | Solid electrolytic capacitor and production thereof |
| JPH08288187A (en) * | 1995-04-10 | 1996-11-01 | Nippondenso Co Ltd | Capacitor |
| JP2001185960A (en) * | 1999-12-27 | 2001-07-06 | Sharp Corp | Amplifier |
| US7183857B2 (en) * | 2002-01-24 | 2007-02-27 | Maxim Integrated Products Inc. | Single supply direct drive amplifier |
| JP2006500884A (en) * | 2002-09-20 | 2006-01-05 | トライクウィント セミコンダクター，インコーポレーテッド | Saturated power amplifier with switchable variable output power level |
| JP2004303934A (en) * | 2003-03-31 | 2004-10-28 | Okaya Electric Ind Co Ltd | Method for manufacturing capacitor |
-
2007
- 2007-01-12 WO PCT/US2007/000762 patent/WO2008085173A1/en active Application Filing
- 2007-01-12 CN CN2007800496895A patent/CN101933084B/en not_active Expired - Fee Related
- 2007-01-12 KR KR1020097013920A patent/KR20100014298A/en not_active Application Discontinuation
- 2007-01-12 JP JP2009545526A patent/JP2010516171A/en active Pending
- 2007-01-12 GB GB0912323.3A patent/GB2458411B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4701957A (en) * | 1986-11-26 | 1987-10-20 | Smith Randall C | Dual mode music instrument preamplifier |
| US5012199A (en) * | 1989-09-08 | 1991-04-30 | St. Louis Music, Inc. | Multi-stage musical instrument amplifier having distortion modes |
| US6792120B1 (en) * | 1999-02-25 | 2004-09-14 | Jonathan M. Szenics | Audio signal enhancement and amplification system |
| US20040240147A1 (en) * | 2003-05-27 | 2004-12-02 | Shin-Etsu Film Co., Ltd. | Oil-impregnated film capacitor and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010516171A (en) | 2010-05-13 |
| CN101933084B (en) | 2013-06-19 |
| WO2008085173A8 (en) | 2009-09-03 |
| GB2458411B (en) | 2012-02-01 |
| GB0912323D0 (en) | 2009-08-26 |
| CN101933084A (en) | 2010-12-29 |
| KR20100014298A (en) | 2010-02-10 |
| WO2008085173A1 (en) | 2008-07-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20220112 |