CN2174010Y - Vacuum tube double track high fidelity multifunctional audio signal transmitter - Google Patents

Abstract

The utility model relates to a multi-functional audio signal transmitter of vacuum tube binaural hi-fi, it mainly comprises preamplification circuit, tone network amplifier circuit, power amplifier and transmitting circuit, all adopted the vacuum electron tube in the circuit. The utility model discloses have the receipt and the transmission characteristic of high-fidelity to audio signal, need not to set up wired network and can directly launch, cooperation combination audio carries out wireless conveying, utilizes the multimachine can the low coverage talk to each other to can cooperate as wired or wireless conveying karaoke's amusement facilities with the sound equipment of entertainment place or family, still can use with cooperation such as various reverberator, balanced device, tuner, can produce special effect.

Description

Multifunctional high-fidelity dual track vacuum-tube sound signal transmitter

The utility model relates to the radio transmission technology, the multi-functional audio signal reflector of particularly a kind of vacuum tube dual track high-fidelity.

At present, audio frequency and electroacoustic techniques more and more develop towards the direction of high-fidelityization, so need high fidelity to characterize audio frequency and electroacoustics system, equipment or components and parts keep the ability of the original looks of voice signal, promptly to the hold facility of complicated sound quality states such as pitch, loudness of a sound, tone color and telepresenc, reverberation sense.And to realize that these high-fidelity indexs just need 1. good sound sources, the 2. high power amplification system of fidelity, the 3. little audio signal generator of the wide distortion factor of frequency response.Yet the equipment or the components and parts of audio frequency and electroacoustic techniques adopt transistor or integrated circuit mostly at present, and relatively poor to the reducing power of voice signal, its reason is:

1. the transistor power amplifier is after load in the equipment, and nonlinear distortion increases sharply, thereby signal is produced serious slicing, and its structure is to cause music program to be sounded send out to make an uproar to harden, and it is bad that tonequality becomes, and produces so-called " dynamic distortion ".Thereby volume must be turned down and to guarantee fidelity.

2. the open-loop gain amount of transistor power amplifier is very big, open loop electroacoustic index is not as the vacuum tube power amplifier, and its good technical indicator is to have relied on very a large amount of negative feedbacks to realize, just makes the transistor power amplifier exist the chance that the transient state intermodulation distortion takes place to show, and its tonequality is degenerated.

3. transistorized output internal resistance is more much smaller than vacuum tube merit, and to lead coefficient value very big in its resistance in other words, and under the relatively poor situation of coupling, it is bad that transient response becomes, and obviously influences great tonequality.

For above-mentioned reasons, people notice that again radio tube is better than transistorized strong point in electroacoustic techniques.

The purpose of this utility model is to provide a kind of wireless transmission emission that both can be used as, and can make the multi-functional audio signal reflector of vacuum tube dual track high-fidelity of clear stereo power amplifier again.

Above-mentioned order of the present utility model is to realize by such structure: promptly it is mainly the identical dual track vacuum tube audio signal amplification emissioning circuit of structure, it is characterized in that it is by pre-amplification circuit, tone network amplifying circuit, power amplifier and radiating circuit are formed, wherein, preamplifier state in the pre-amplification circuit is for adopting the twin-stage amplifying circuit of two pliotrons, the signal of the stereo record-player input of audio signal input end is imported by first order vacuum electronic amplifier tube, the signal of CD compact disc player input is imported by second level vacuum electronic amplifier tube negative electrode, microphone signal is through semiconductor triode common emitter amplifying circuit and vacuum electronic amplifier tube impedance matching thereafter, again through the crosslinked second level of being coupled to pre-amplification circuit of capacitance-resistance; Described pre-amplification circuit carries out voltage amplification by radio tube with amplifying signal again behind the tone lattice network, and the signal after will amplifying is sent into thereafter power amplifier and radiating circuit.

Said structure of the present utility model can further specify by accompanying drawing.

The utility model has following accompanying drawing:

Accompanying drawing 1 is the utility model schematic block circuit diagram;

Accompanying drawing 2 is an instance graph of circuit structure;

Accompanying drawing 3 is the instance graph of the utility model power amplifier and radiating circuit;

Accompanying drawing 4 is the winding diagram of output transformer in the radiating circuit.

Referring to accompanying drawing 1, the utility model is made up of pre-amplification circuit, tone network voltage amplifying circuit, power amplifier and radiating circuit, and its left and right acoustic channels circuit structure is identical, comprises CD compact disc player input OUT in each sound channel, stereo record-player input AUX, microphone input PHON.

Referring to Fig. 2, this circuit is the instance graph of a sound channel of the utility model, G among the figure ₁～G ₄Be two pliotrons, its 1/2nd preamplifier state and voltage amplifier stage of forming respectively by left and right sound channels.The stereo record-player signal by input AUX from the first amplifying stage G ₂The input, CD compact disc player signal by input QUT from second utmost point amplifying stage G ₃By resistance W ₂Sliding end import at negative electrode, microphone signal is by transistor BG and peripheral cell R thereof ₂, R ₄The common emitter circuit coupling input that constitutes is through G ₁Pass through resistance R after the amplification ₁₀, W ₁, capacitor C ₅Commissure is coupled to the second amplifying stage G ₃Signal after pre-amplification circuit amplifies is sent into the tone control lattice network; The tone control network is the reaction type tone control circuit that adopts same step voltage to amplify, and it is by R ₂₁～R ₂₅, W ₃, W ₄, capacitor C ₁₄～C ₁₆And G ₄, C ₁7 formations such as grade are regulated W ₃Can make high pitch obtain decay, regulate W ₄Can make bass obtain decay, their part is passed through R ₂₅With G ₄Grid connect, signal is by G ₄Be amplified in its anode output, and pass through C ₁₇Feed back to the tuning lattice network; Through G ₄The signal of screen level output is through C ₁₈, K ₁To the A point, send into beam tetrode G thus ₅Carry out power amplification owing to adopt fixing gate bias, the value of its gate bias between Class A and Class B, G ₅Anode output connect by C ₂₁, B ₁, K ₂And the foldback circuit of loudspeaker Y formation, and by choking-winding L ₁, K ₃Be connected to by beam tetrode G ₆, oscillator coil L ₂And the radiating circuit that constitutes of peripheral cell, the audio signal that high-frequency oscillating circuits is carried will transmit is through antenna transmission.L ₂On be parallel with two strings tunable capacitor C together, make tranmitting frequency adjustable continuously.

Fig. 3 is the line map of another example of power amplifier and radiating circuit, and signal is by the input of A point, by double-triode valve G ₇The paraphase of negative electrode commissure formula, i.e. G ₇Half is done and promotes to amplify, and second half does paraphase, and anode is opposite with the cathode voltage phase place during owing to paraphase output, works as R ₃₈=R ₃₉The time, at C ₃₀And C ₃₁The voltage of input equates, and phase place is opposite, drives thus by beam tetrode G ₈, G ₉The push-pull amplifier circuit work that constitutes, amplifying signal is by output transformer B ₃With export after the horn coupled, and by current coil L ₁, K ₂Be coupled to by beam tetrode G ₁₀And oscillator coil L ₂The radiating circuit of forming, the audio signal that higher-order of oscillation electric current is carried will transmit is through antenna transmission.

Referring to Fig. 4, the output transformer B of push-pull circuit ₃Take the layer and section coiling, to guarantee high-fidelity, its elementary P that is divided into ₂～P ₄Four sections with secondary L and two winding layerings of R coiling.

The utility model major technique effect:

This utility model has amplifies various sound sources, as the power amplification function of the clear stereo of CD compact disc player, stereo record-player, electrophonic musical instrument, microphone etc., can launch the audio signal of various high-fidelities again.

Use this machine can save various meetings, athletic meeting or other when movable, use sound amplifier to want rewiring, loaded down with trivial details work such as audition only needs that this machine is placed broadcasting equipment that on-the-spot energized utilizes original studio and need not the professional and can carry out wireless transmission.Commercial, public organization can be used for advertisement or other propaganda is used, and need not the bridge joint cable network can directly launch, and carries out wireless transmission, and can obtain the acoustical quality of high-fidelity, utilizes multimachine closely to communicate with each other.

This machine can be used with various reverberators, equalizer, organ stop etc., can produce special acoustics, is the good wired or wireless transmission Karaoke recreational facilities of public place of entertainment or family.It is the clear stereo power amplifier that this machine cooperates audio amplifier to use, and is senior reward sound equipment, and this machine uses potentiality big, can realize product seriation, and utilizing its characteristic also can apply to other scope can not become stand-by equipment.

The utility model basic mechanical design feature:

1, power supply: 220V AC 50Hz

2, consumed power: 100W

3, input sensitivity:

Microphone low-resistance 0.43mV high resistant 4mV pickup 120mV

4, the distortion factor: 0.5% signal to noise ratio: 50dB

5, power output: 50W～100W

6, frequency response: 20～20000Hz

7, tranmitting frequency: 525KHz～108MHz

Frequency modulation, amplitude modulation are adjustable continuously

8, transmitting range: be no less than 1000 meters

Claims (3)

1, the multi-functional audio signal reflector of vacuum tube dual track high-fidelity, comprise the dual track vacuum tube audio signal amplification emissioning circuit that structure is identical, it is characterized in that it mainly is made up of pre-amplification circuit, tone network amplifying circuit, power amplifier and radiating circuit, wherein, pre-amplification circuit is for adopting two pliotron (G ₂, G ₃) the two-stage amplifying circuit, the signal of the stereo record-player input AUX in the audio signal input end is by resistance W ₂Sliding end by second level vacuum electronic amplifier tube G ₂Input, the signal of CD compact disc player input OUT is by first order vacuum electronic amplifier tube G ₃Input, the signal of microphone input PHON is through semiconductor triode common emitter amplifying circuit (BG, R ₂, R ₄) and vacuum electronic amplifier tube G thereafter ₁After the anti-resistance coupling, again through capacitance-resistance (R ₁₀, W ₁, C ₅) commissure is coupled to the second amplifying stage G ₃, the signal after pre-amplification circuit will amplify send tone network amplifying circuit to carry out the adjusting of high bass, and the signal after the adjusting is by radio tube G ₄Carry out voltage amplification again, through G ₄The signal of output feeds back to the tuning lattice network on the one hand, feed back to the tuning lattice network on the other hand, deliver to power amplifier and radiating circuit that the power amplifier level that is made of power amplifier level and transmitter unit and transmitter unit constitute on the other hand, wherein foldback circuit is delivered in the output one tunnel of power amplifier level, and one the tunnel through choking-winding L ₁And switch is connected to mainly by beam tetrode, oscillator coil L ₂, be connected in parallel on L ₂On two strings tunable capacitor C and transmitter unit of constituting of antenna together.

2, the multi-functional audio signal reflector of high-fidelity according to claim 1, the power amplifier level that it is characterized in that power amplifier and radiating circuit is by beam tetrode G ₅Constitute.

3, the multi-functional audio signal reflector of high-fidelity according to claim 1, the power amplifier part that it is characterized in that power amplifier and radiating circuit is by two three utmost point radio tube G ₇And the promotion amplification and the phase inverter of peripheral cell formation, and by beam tetrode G ₈, G ₉The push-pull amplifier circuit that constitutes constitutes.

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