FR2703532A1 - Amplifier device with vacuum valves for an electric guitar - Google Patents
Amplifier device with vacuum valves for an electric guitar Download PDFInfo
- Publication number
- FR2703532A1 FR2703532A1 FR9303873A FR9303873A FR2703532A1 FR 2703532 A1 FR2703532 A1 FR 2703532A1 FR 9303873 A FR9303873 A FR 9303873A FR 9303873 A FR9303873 A FR 9303873A FR 2703532 A1 FR2703532 A1 FR 2703532A1
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- FR
- France
- Prior art keywords
- channel
- signal
- section
- switching system
- polarization
- 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.)
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- 238000003780 insertion Methods 0.000 claims abstract description 25
- 230000037431 insertion Effects 0.000 claims abstract description 25
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 8
- 230000010287 polarization Effects 0.000 claims description 10
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/26—Push-pull amplifiers; Phase-splitters therefor
- H03F3/28—Push-pull amplifiers; Phase-splitters therefor with tubes only
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
Abstract
Description
DISPOSITIF AMPLIFICATEUR A TUBES A VIDE POUR GUITARE éLECTRIQUE
La présente invention concerne un dispositif permettant la préamplification et l'amplification de puissance du signal provenant d'une guitare électrique. Ce dispositif se distingue par l'utilisation exclusive de tubes à vide pour la partie audio, par un système de commutation de canaux complexe et par un dispositif d'insertion adapté.AMPLIFIER DEVICE WITH VACUUM TUBES FOR ELECTRIC GUITAR
The present invention relates to a device for preamplifying and amplifying the power of the signal from an electric guitar. This device is distinguished by the exclusive use of vacuum tubes for the audio part, by a complex channel switching system and by a suitable insertion device.
Les amplificateurs connus à lampes disposant de deux canaux distincts sont construits sur des bases de compromis, le premier étage préamplificateur conditionnant les deux canaux à travers la polarisation fixe de cathode du premier tube préamplificateur (1/2 12AX7A). Pour résoudre ce problème, une polarisation de la cathode du premier tube, différente pour chaque famille de sons, actionnée par un système de commutation adéquat, permet une base de son distincte pour chaque canal. Cela permet ainsi l'utilisation d'un seul préamplificateur (1/2 12AX7A) et évite l'affaiblissement du signal d'entrée si il était distribué à deux étages d'entrée simultanément.The known tube amplifiers having two distinct channels are built on compromise bases, the first preamplifier stage conditioning the two channels through the fixed cathode bias of the first preamplifier tube (1/2 12AX7A). To solve this problem, a polarization of the cathode of the first tube, different for each family of sounds, actuated by an adequate switching system, allows a distinct sound base for each channel. This allows the use of a single preamplifier (1/2 12AX7A) and prevents weakening of the input signal if it were distributed to two input stages simultaneously.
Dans un meme ordre d'idée, les dispositifs connus d'insertion d'effets des amplificateurs à lampes ne permettent qu'une insertion passive unique ou une insertion constituée de composants tels que les transistors ou les circuits intégrées de type opérationnels ou bien encore d'une seule insertion commutée.In the same vein, the known devices for inserting effects from tube amplifiers only allow a single passive insertion or an insertion made up of components such as transistors or integrated circuits of the operational type or even '' only one switched insertion.
Aussi pour optimiser un tel système, un dispositif actif constitué de tubes uniquement et de composants passifs, met à la disposition des appareils de traitement de son externe un signal basse impédance de niveau ligne, une insertion pour chaque canal et une insertion commune.Also to optimize such a system, an active device consisting of tubes only and passive components, provides external sound processing devices with a low level line impedance signal, an insertion for each channel and a common insertion.
L'appareil, selon l'invention, possède une section preamplificatrice à deux canaux permettant à l'utilisateur guitariste d'obtenir deux familles de sons : un canal clair dit "CLEAN" et un canal sature dit "DRIVE". Un système de commutation permet de passer instantanément d'un son à l'autre.The device according to the invention has a preamplifier section with two channels allowing the guitarist user to obtain two families of sounds: a clear channel called "CLEAN" and a saturated channel called "DRIVE". A switching system allows you to instantly switch from one sound to another.
Le dispositif électronique à base de tubes à vide comprend une section préamplificatrice à deux canaux, un dispositif actif d'insertion d'appareils de traitement de son externe et une section amplificatrice de puissance. La partie preamplificatrice du dispositif est caractérisée par une polarisation de cathode distincte pour chaque canal de ltétage de preamplification d'entrée permettant une base de son distincte pour les deux familles de sons ; par la faculté du dispositif d'insertion de mettre en oeuvre une insertion propre pour chaque canal et de disposer d'une insertion commune ; par un système de commutation commandant de façon simultanée le changement de canal, de polarisation et d'insertion suivant la famille de sons demandée. The electronic device based on vacuum tubes comprises a two-channel preamplifier section, an active device for inserting external sound processing devices and a power amplifier section. The preamplifier part of the device is characterized by a distinct cathode polarization for each channel of the input preamplification stage allowing a distinct sound base for the two families of sounds; by the ability of the insertion device to implement a specific insertion for each channel and to have a common insertion; by a switching system controlling simultaneously the change of channel, polarization and insertion according to the family of sounds requested.
Les annexes 1, 2 et 3 illustrent l'invention.Annexes 1, 2 and 3 illustrate the invention.
L'annexe 1 représente le synoptique de l'invention.Annex 1 shows the block diagram of the invention.
Les annexes 2 et 3 représentent le schéma électronique de l'invention.Annexes 2 and 3 represent the electronic diagram of the invention.
La section preamplificatrice est composée des parties 1,2 et 3.The preamplifier section is made up of parts 1,2 and 3.
La partie n 1 permet une première amplification du signal applique à entrée de l'appareil via
J7.Cette amplification est réalisée par V1A (1/2 12AX7A), la polarisation de la cathode V1A assure le gain et la bande passante de l'amplification réalisée. Cette polarisation de la cathode est différente suivant le canal choisi grâce au système de commutation (partie n"7). En position canal clair le point de jonction C26, R4 est appliqué à la masse par le relais RL1,
C26 agit alors sur la polarisation de V1A. En position canal saturé, le point de jonction C26,
R4 n'est pas appliqué à la masse, C26 n'agit pas sur la polarisation RL1 nuant pas excité.Le signal guitare ainsi amplifié et polarisé est ensuite distribué aux deux canaux : via un réseau de tonalités passif classique (C1, C3, C4, R5, P3, PI, P2) et un réglage de gain (C5, C6, R6,
P4) pour le canal clair, via un réglage de gain (ClO, Cl l, Ri 1, et P6) pour le canal saturé.Part n 1 allows a first amplification of the signal applied to the device input via
J7.This amplification is carried out by V1A (1/2 12AX7A), the polarization of the cathode V1A ensures the gain and the passband of the amplification carried out. This cathode polarization is different depending on the channel chosen using the switching system (part no. 7). In the clear channel position, the junction point C26, R4 is applied to ground by the relay RL1,
C26 then acts on the polarization of V1A. In the saturated channel position, the junction point C26,
R4 is not applied to ground, C26 does not act on the polarization RL1 does not obscure excited. The guitar signal thus amplified and polarized is then distributed to the two channels: via a conventional passive tone network (C1, C3, C4 , R5, P3, PI, P2) and a gain control (C5, C6, R6,
P4) for the clear channel, via a gain setting (ClO, Cl l, Ri 1, and P6) for the saturated channel.
La section canal clair est caractérisée partie n"2 (annexe 1). V4A (1/2 12AX7A) est chargée de redonner de l'amplitude au signal issu de la partie n 1 (annexe 1). Le signal amplifie par
V4A aboutit dans un réglage de volume (C8, R23, P5). C9, R9, SW1 mettent une fraction du spectre aigue à la masse.The clear channel section is characterized part n "2 (appendix 1). V4A (1/2 12AX7A) is responsible for restoring amplitude to the signal from part n 1 (appendix 1). The signal amplifies by
V4A ends in a volume control (C8, R23, P5). C9, R9, SW1 put a fraction of the acute spectrum to ground.
La section canal saturé, partie n"3 (annexe 1), recueille le signal au point milieu de P6. La particularité de ce canal est de compresser et de saturer le signal issu de la partie n 1. Le signal est amplifié par V1B (1/2 12AX7A), filtré (C13, C14, C15, R13, R14, R15, R16), puis appliqué à la grille de V2A (1/2 12AX7A). Le signal issu de V2A n'est pas découplé, l'anode est connecté directement à la grille de V2B (1/2 12AX7A). V2B est constituée en montage cathodyne.Le signal repris à la cathode de V2B est appliqué à un réseau classique de tonalités (C17, C18, C19, R20, P7, P8, P9) et un réglage de volume (C20, P10). Un pont diviseur formé par R21 et R22 est chargé d'atténuer le niveau de sortie du canal saturé.The saturated channel section, part n "3 (appendix 1), collects the signal at the midpoint of P6. The particularity of this channel is to compress and saturate the signal from part n 1. The signal is amplified by V1B ( 1/2 12AX7A), filtered (C13, C14, C15, R13, R14, R15, R16), then applied to the V2A grid (1/2 12AX7A). The signal from V2A is not decoupled, the anode is connected directly to the grid of V2B (1/2 12AX7A). V2B is made up in cathodyne assembly. The signal taken from the cathode of V2B is applied to a conventional network of tones (C17, C18, C19, R20, P7, P8, P9) and a volume control (C20, P10) A dividing bridge formed by R21 and R22 is responsible for attenuating the output level of the saturated channel.
Les parties 4 et 5 caractérisent le dispositif d'insertion.Parts 4 and 5 characterize the insertion device.
Le signal issu des parties n"2 ou n"3 entre dans Ia partie n"4. I1 est remis en forme par V3A (1/2 12AX7A) et V3B (1/2 12AX7A) se charge de le transformer en signal basse impédance par le biais d'un montage cathodyne. Le signal basse impédance découplé par C33, atténué par R30 et R33 pour lui assurer un niveau ligne est ensuite dirigé vers 3 connexions allerretour permettant l'emploi d'appareils de traitement de son externe supportant un niveau ligne entre le préampli (parties n 1, 2 et 3) et l'amplificateur de puissance (partie n 6).Deux de ces connexions aller-retour dites "insertions" sont disposées en parallèle et sont dédiées chacune à un canal, le système de commutation assure le basculement instantané d'une insertion à l'autre en cas de changement de canal. Cette faculté permet l'utilisation d'un appareil de traitement de son différent pour chacun des deux canaux. A noter l'utilisation de photorésistances (LT3 et
LT4) pour effectuer ces deux insertions automatiques. Ces deux insertions aboutissent sur une insertion dite "générale" commune aux deux canaux. Les sorties J1, J3 et J4, ainsi que les retours J2, J4 et J6 sont réalisées à l'aide de jacks femelle dits "à coupure", ainsi, si aucune des insertions n'est utilisée le trajet du signal n'est jamais interrompu entre les parties 4 et 5.The signal from parts n "2 or n" 3 enters part n "4. I1 is reshaped by V3A (1/2 12AX7A) and V3B (1/2 12AX7A) is responsible for transforming it into a low impedance signal by means of a cathodyne assembly. The low impedance signal decoupled by C33, attenuated by R30 and R33 to ensure a line level is then directed to 3 return connections allowing the use of external sound processing devices supporting a level line between the preamp (parts 1, 2 and 3) and the power amplifier (part 6). Two of these round-trip connections called "inserts" are arranged in parallel and are each dedicated to a channel, the system switch ensures instant switching from one insertion to another in the event of a channel change. This option allows the use of a different sound processing device for each of the two channels. Note the use of photoresistors ( LT3 and
LT4) to perform these two automatic insertions. These two insertions lead to a so-called "general" insertion common to the two channels. The outputs J1, J3 and J4, as well as the returns J2, J4 and J6 are carried out using female jacks called "cut-off", thus, if none of the insertions is used the signal path is never interrupted between parts 4 and 5.
La partie n"5 est chargée de remettre en forme le signal provenant du dispositif d'insertion et lui donner un niveau acceptable pour attaquer l'amplificateur de puissance. V4B (1/2 12AX7A) est chargé de cette remise en forme du signal, un réglage de volume général permet un dosage du signal envoyé à la section amplificatrice de puissance (partie n"6). Part No. 5 is responsible for reshaping the signal from the insertion device and giving it an acceptable level for attacking the power amplifier. V4B (1/2 12AX7A) is responsible for reshaping the signal, a general volume control allows a dosage of the signal sent to the power amplifier section (part n "6).
Cette partie n 6, section de puissance, est de facture classique et n'appelle aucune remarque particulière. Elle est constituée par un déphaseur de Schmidt formé par V5A et V5B (12AX7) chargé du déphasage du signal afin d'attaquer un double push-pull de tétrodes. Un transformateur d'impédance adapte l'impédance du circuit final à l'impédance des hautsparleurs couramment utilisés. Cet amplificateur fonctionne en classe AB I, les grilles d'entrée du push-pull sont polarisées de façon fixe par une tension négative dite "de bias".This part n 6, power section, is of classic invoice and does not call for any particular remark. It consists of a Schmidt phase shifter formed by V5A and V5B (12AX7) responsible for phase shifting the signal in order to attack a double push-pull of tetrodes. An impedance transformer adapts the impedance of the final circuit to the impedance of commonly used speakers. This amplifier works in class AB I, the input grids of the push-pull are fixedly polarized by a negative voltage called "bias".
La partie n"7 constitue la partie active de la commutation. La logique de commande est confiée à IC1, quadruple portes NAND, la commutation-même est effectuée par IC2 (ULN2803), il commande directement les leds d'indication du canal utilisé et les optocoupleurs à photorésistance chargé de commuter les canaux ainsi que les insertions dédiées, le transistor T1 se charge de commuter le relais RL1 (annexe 2) qui assure le changement de la polarisation de cathode de V1A et la mise à la masse du signal saturé.Part n "7 constitutes the active part of the switching. The control logic is entrusted to IC1, quadruple NAND doors, the switching itself is carried out by IC2 (ULN2803), it directly controls the LEDs indicating the channel used and the photoresistor optocouplers responsible for switching the channels as well as the dedicated inserts, the transistor T1 is responsible for switching the relay RL1 (appendix 2) which ensures the change of the cathode polarization of V1A and the grounding of the saturated signal.
Le dispositif selon l'invention est particulièrement destiné à l'usage des guitaristes. The device according to the invention is particularly intended for the use of guitarists.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9303873A FR2703532A1 (en) | 1993-03-30 | 1993-03-30 | Amplifier device with vacuum valves for an electric guitar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9303873A FR2703532A1 (en) | 1993-03-30 | 1993-03-30 | Amplifier device with vacuum valves for an electric guitar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2703532A1 true FR2703532A1 (en) | 1994-10-07 |
Family
ID=9445663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9303873A Pending FR2703532A1 (en) | 1993-03-30 | 1993-03-30 | Amplifier device with vacuum valves for an electric guitar |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2703532A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987000331A1 (en) * | 1985-07-11 | 1987-01-15 | Xax Limited | Audio signal generating system |
| US4890331A (en) * | 1988-01-11 | 1989-12-26 | Peavey Electronics Corporation | Specialized amplifier systems for musical instruments |
| US5127059A (en) * | 1990-01-18 | 1992-06-30 | Gibson Guitar Corp. | Audio amplifiers |
-
1993
- 1993-03-30 FR FR9303873A patent/FR2703532A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987000331A1 (en) * | 1985-07-11 | 1987-01-15 | Xax Limited | Audio signal generating system |
| US4890331A (en) * | 1988-01-11 | 1989-12-26 | Peavey Electronics Corporation | Specialized amplifier systems for musical instruments |
| US5127059A (en) * | 1990-01-18 | 1992-06-30 | Gibson Guitar Corp. | Audio amplifiers |
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