Vacuum tube power amplifier with external noise adjusting function
By designing external noise adjustment function in the vacuum tube power amplifier, users can adjust the hum adjustment parts through external tools, solving the noise problem of the vacuum tube power amplifier and improving the convenience of user experience and sound quality adjustment.
Patent Information
- Application Number
- CN202421580677.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-04
AI Technical Summary
Existing vacuum tube power amplifiers may cause noise, such as humming, and users need to remove the bottom cover or protective cover when adjusting the sound effects, which will affect user experience and safety.
A vacuum tube power amplifier with external noise adjustment function is designed. By setting a humming adjustment member on the power amplifier body and opening an adjustment hole on the top plate, the user can extend the adjustment hole through an external tool to adjust the humming adjustment member to achieve noise adjustment without disassembling the power amplifier body.
This design allows users to avoid worrying about touching the heated vacuum tube, which is convenient for replacing vacuum tubes of different specifications, and adjusting humming through external tools, which increases the user's experience and participation and improves the convenience of sound quality adjustment.
Smart Images
Figure CN222785966U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vacuum tube power amplifiers, in particular to a vacuum tube power amplifier with an external noise adjustment function. Background Art
[0002] Vacuum tube power amplifiers are a type of audio product that uses vacuum tubes to amplify audio signals, and then outputs them to speakers to produce sound after transformer coupling and impedance matching. Vacuum tube audio power amplifiers are widely loved by music enthusiasts for their good sound quality and ability to restore the music scene in its original form. Therefore, vacuum tube audio power amplifiers are generally positioned at the high end, and the performance requirements for the electronic components used are much higher than those of ordinary audio equipment.
[0003] At present, vacuum tube power amplifiers may produce noise after being used for a long time, such as hum, which is the 50 Hz AC sound of the mains. It is named because the sound is low-frequency and similar to the hum. Excessive power supply ripple coefficient and poor anti-interference performance can cause hum. Moreover, with the market's continuous pursuit of sound quality, users are more willing to modify vacuum tube power amplifiers, such as replacing vacuum tubes of different specifications by themselves to adjust the sound effect, which may also cause the generation of hum. Therefore, users need to remove the bottom cover of the vacuum tube power amplifier or remove the protective cover installed by screws before they can adjust from the inside of the vacuum tube power amplifier to eliminate the hum. However, due to the high voltage inside the vacuum tube power amplifier, users dare not try to adjust it, which affects the user's experience and sense of participation. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a vacuum tube power amplifier with an external noise adjustment function which is convenient for adjusting hum.
[0005] The technical solution adopted by the utility model is: the utility model comprises a power amplifier body and a protective cover, a plurality of vacuum tubes are arranged on the power amplifier body, the power amplifier body has a top plate, the protective cover is detachably connected to the top plate, the plurality of vacuum tubes are located in the protective cover, a hum adjustment piece is arranged in the power amplifier body, an adjustment hole located above the hum adjustment piece is opened on the top plate, and the adjustment hole is used for an external tool to extend into to adjust the hum adjustment piece.
[0006] Furthermore, the hum adjustment member and the adjustment hole are both close to one side of the power amplifier body.
[0007] Furthermore, a mounting seat is provided in the power amplifier body, the hum adjustment component includes a circuit board and a rotary potentiometer, connecting columns are provided at both ends of the circuit board, the upper ends of the two connecting columns are connected to the bottom of the mounting seat, and an opening located below the adjustment hole is provided on the mounting seat, and the rotary potentiometer is connected to the circuit board and extends from the bottom to the top of the opening.
[0008] Furthermore, a transformer module is provided at the upper end of the power amplifier body, the rear end of the top plate abuts against the transformer module, and the transformer module includes a power transformer and two output transformers, and the two output transformers are respectively located on both sides of the power transformer.
[0009] Furthermore, two protective plates are arranged at the upper end of the power amplifier body, and the two protective plates are arranged on both sides of the transformer module respectively.
[0010] Furthermore, the bottom of the power amplifier body is provided with a plurality of supporting feet, and the bottoms of the plurality of supporting feet are all provided with soft pads.
[0011] Furthermore, a mounting groove is provided at the upper end of the power amplifier body, and the bottom of the protective cover is snapped into the mounting groove.
[0012] Furthermore, the rear end of the protection cover abuts against the transformer module and the protection plate.
[0013] Furthermore, an observation port is provided on the protective cover, and the observation port is exposed at the front end surface and the upper end surface of the protective cover, and a plurality of heat dissipation strip holes are provided on the surface of the protective cover.
[0014] Furthermore, a control panel corresponding to the observation port is arranged on the top plate, and the cross-sections of the control panel and the observation port are both trapezoidal. The protective cover has two inclined plates arranged opposite to each other, and the two inclined plates are both located at the front end of the observation port and respectively abut against the two sides of the control panel.
[0015] The beneficial effects of the utility model are:
[0016] With respect to the deficiencies of the prior art, in the present invention, by providing a detachable protective cover, the user does not need to worry about accidentally touching the vacuum tube that is working and heating up, and can easily replace vacuum tubes of different specifications after removing the protective cover; in addition, when it is necessary to eliminate the hum, the user only needs to remove the protective cover, and further reach into the adjustment hole through an external tool to adjust the hum adjustment member, and the hum can be adjusted without disassembling the power amplifier body, which increases the enthusiasm of the user to independently replace the vacuum tubes of different specifications, improves the user's experience and sense of participation, and makes the present invention have the advantage of facilitating the adjustment of the hum. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0018] Figure 1 This is a three-dimensional structure diagram of the utility model. Figure 1 ;
[0019] Figure 2 This is a three-dimensional structure diagram of the utility model. Figure 2 ;
[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model after the protective cover is removed;
[0021] Figure 4 yes Figure 3 A partial enlarged schematic diagram of part A;
[0022] Figure 5 It is a schematic diagram of the planar structure of the utility model after the protective cover is removed;
[0023] Figure 6 It is a cross-sectional schematic diagram of the utility model;
[0024] Figure 7 yes Figure 6 A partial enlarged schematic diagram of part B;
[0025] Figure 8 It is a three-dimensional structural schematic diagram of the protective cover of the utility model.
[0026] The reference numerals are as follows:
[0027] 1. Power amplifier body; 2. Protective cover; 3. Vacuum tube; 4. Master volume knob; 5. Top plate; 6. Hum adjustment piece; 7. Adjustment hole; 8. Mounting seat; 9. Circuit board; 10. Rotary potentiometer; 11. Connecting column; 12. Opening; 13. Transformer module; 14. Power switch; 15. Power transformer; 16. Output transformer; 17. Protective plate; 18. Support foot; 19. Soft pad; 20. Installation groove; 21. Observation port; 22. Heat dissipation strip hole; 23. Control panel; 24. Terminal block; 25. Tilt plate.
[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0032] like Figures 1 to 6 As shown, in this embodiment, the utility model includes a power amplifier body 1 and a protective cover 2, a plurality of vacuum tubes 3 are arranged on the power amplifier body 1, the power amplifier body 1 has a top plate 5, the protective cover 2 is detachably connected to the top plate 5, the plurality of vacuum tubes 3 are all located in the protective cover 2, a hum adjustment member 6 is arranged in the power amplifier body 1, an adjustment hole 7 located above the hum adjustment member 6 is opened on the top plate 5, and the adjustment hole 7 is used for an external tool to extend into to adjust the hum adjustment member 6. Among them, the power amplifier body 1 can use an aviation aluminum panel as a high-strength metal shell; the front end surface of the power amplifier body 1 is provided with a groove, the middle part of the groove is provided with a master volume knob 4, the side end surface of the power amplifier body 1 is provided with a power switch 14, and the rear end surface of the power amplifier body 1 is provided with a plurality of wiring terminals 24.
[0033] With respect to the deficiencies of the prior art, in the present invention, by providing a detachable protective cover 2, the user does not need to worry about accidentally touching the vacuum tube 3 that is working and generating heat, and can easily replace the vacuum tube 3 of different specifications after removing the protective cover 2; in addition, when it is necessary to eliminate the hum, the user only needs to remove the protective cover 2, and further reach into the adjustment hole 7 through an external tool to adjust the hum adjustment member 6, and the hum can be adjusted without disassembling the power amplifier body 1, which increases the enthusiasm of the user to independently replace the vacuum tube 3 of different specifications, improves the user's experience and sense of participation, and makes the present invention have the advantage of facilitating the adjustment of the hum.
[0034] like Figure 5 As shown, in some embodiments, the hum adjustment member 6 and the adjustment hole 7 are both close to one side of the power amplifier body 1. Specifically, since the vacuum tube 3 will heat up when in use, by arranging the hum adjustment member 6 and the adjustment hole 7 close to one side of the power amplifier body 1, the user has sufficient operating space, and can avoid touching the vacuum tube 3 and other components as much as possible when adjusting with external tools, thereby further facilitating the adjustment of the hum.
[0035] like Figure 6 to Figure 7 As shown, in some embodiments, a mounting seat 8 is provided in the power amplifier body 1, and the hum adjustment member 6 includes a circuit board 9 and a rotary potentiometer 10. Connecting posts 11 are provided at both ends of the circuit board 9, and the upper ends of the two connecting posts 11 are connected to the bottom of the mounting seat 8. The mounting seat 8 is provided with an opening 12 located below the adjustment hole 7, and the rotary potentiometer 10 is connected to the circuit board 9 and extends from the bottom to the top of the opening 12. Specifically, an external tool is inserted into the adjustment hole 7 from top to bottom, and the rotary potentiometer 10 is rotated, so as to adjust and eliminate the hum; in addition, the circuit board 9 is connected to the mounting seat 8 through the connecting posts 11 at both ends thereof, so that the rotary potentiometer 10 can be firmly connected and is not easy to shake when adjusting the hum.
[0036] like Figures 1 to 6As shown, in some embodiments, a transformer module 13 is provided at the upper end of the power amplifier body 1, and the rear end of the top plate 5 abuts against the transformer module 13. The transformer module 13 includes a power transformer 15 and two output transformers 16, and the two output transformers 16 are respectively located on both sides of the power transformer 15; two protective plates 17 are provided at the upper end of the power amplifier body 1, and the two protective plates 17 are respectively provided on both sides of the transformer module 13; a plurality of supporting feet 18 are provided at the bottom of the power amplifier body 1, and soft pads 19 are provided at the bottom of the plurality of supporting feet 18. Specifically, the power transformer 15 is used to supply power to the entire power amplifier, and an output transformer 16 on each side thereof acts as an impedance change to match the speaker or audio; further, two protective plates 17 are respectively provided on both sides of the transformer module 13 to protect the transformer module 13; in addition, a plurality of supporting feet 18 are provided at the bottom of the power amplifier body 1 and soft pads 19 are provided at the bottom of the supporting feet 18 to reinforce the bottom of the power amplifier body 1, which can effectively avoid the influence of the external environment on the sound.
[0037] like Figures 1 to 8 As shown, in some embodiments, the upper end of the power amplifier body 1 is provided with a mounting groove 20, and the bottom of the protective cover 2 is clamped in the mounting groove 20; the rear end of the protective cover 2 abuts against the transformer module 13 and the protective plate 17; the protective cover 2 is provided with an observation port 21, and the observation port 21 is exposed on the front end face and the upper end face of the protective cover 2, and the surface of the protective cover 2 is provided with a plurality of heat dissipation strip holes 22. Specifically, by clamping the protective cover 2 in the mounting groove 20, and abutting against the transformer module 13 and the protective plate 17 after clamping, the protective cover 2 is not easy to fall off, and can be firmly clamped on the upper end of the power amplifier body 1; in addition, by providing the observation port 21 and the plurality of heat dissipation strip holes 22 on the protective cover 2, the user can observe the internal situation through the observation port 21, so as to improve the ornamental value of the power amplifier, and when the power amplifier is in use, it can dissipate heat through the plurality of heat dissipation strip holes 22, so as to timely dissipate the heat generated by the vacuum tube 3.
[0038] like Figure 5 and Figure 8As shown, in some embodiments, the top plate 5 is provided with a control panel 23 corresponding to the observation port 21, and the cross-sections of the control panel 23 and the observation port 21 are both trapezoidal, and the protective cover 2 has two inclined plates 25 arranged opposite to each other, and the two inclined plates 25 are both located at the front end of the observation port 21 and respectively abut against the two sides of the control panel 23. Among them, the control panel 23 has four function levers, a BIAS display meter and a status display light in the shape of a classical Roman column; the four function levers can control the input switching, NFB (negative feedback amount) and BIAS bias adjustment switching; the status display light has a plurality of Roman columns, and the plurality of Roman columns are arranged in a half circle of the BIAS display meter; each Roman column represents a different working state, including the input source and the negative feedback depth, and the plurality of Roman columns will light up one by one to display the working state of the whole machine, presenting a magnificent appearance. Specifically, the cross-sections of the control panel 23 and the observation port 21 are both arranged in a trapezoidal shape, so that the power amplifier has a better ornamental appearance; in addition, when the protective cover 2 is snapped onto the mounting groove 20, the two inclined plates 25 of the protective cover 2 can respectively abut against the two sides of the control panel 23, so that the protective cover 2 can be more stable and not easy to fall off; moreover, the two inclined plates 25 are both arranged at the front end of the observation port 21 to reduce the opening area of the observation port 21, so that the two inclined plates 25 can better prevent the user from accidentally touching the vacuum tube 3 that is working and generating heat without affecting the ornamental appearance.
[0039] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A vacuum tube power amplifier with an external noise adjustment function, characterized in that: The invention comprises a power amplifier body (1) and a protective cover (2), wherein a plurality of vacuum tubes (3) are arranged on the power amplifier body (1), the power amplifier body (1) has a top plate (5), the protective cover (2) is detachably connected to the top plate (5), the plurality of vacuum tubes (3) are all located in the protective cover (2), a hum adjustment member (6) is arranged in the power amplifier body (1), an adjustment hole (7) located above the hum adjustment member (6) is opened on the top plate (5), and the adjustment hole (7) is used for allowing an external tool to extend into to adjust the hum adjustment member (6).
2. The vacuum tube power amplifier with external noise adjustment function according to claim 1, characterized in that: The hum adjustment member (6) and the adjustment hole (7) are both close to one side of the power amplifier body (1).
3. A vacuum tube power amplifier with external noise adjustment function according to claim 1 or 2, characterized in that: The power amplifier body (1) is provided with a mounting seat (8), the hum adjustment member (6) comprises a circuit board (9) and a rotary potentiometer (10), both ends of the circuit board (9) are provided with connecting posts (11), the upper ends of the two connecting posts (11) are connected to the bottom of the mounting seat (8), the mounting seat (8) is provided with an opening (12) located below the adjustment hole (7), and the rotary potentiometer (10) is connected to the circuit board (9) and extends from the bottom to the top of the opening (12).
4. The vacuum tube power amplifier with external noise adjustment function according to claim 3, characterized in that: A transformer module (13) is provided at the upper end of the power amplifier body (1), the rear end of the top plate (5) abuts against the transformer module (13), and the transformer module (13) comprises a power transformer (15) and two output transformers (16), wherein the two output transformers (16) are respectively located on both sides of the power transformer (15).
5. The vacuum tube power amplifier with external noise adjustment function according to claim 4, characterized in that: Two protective plates (17) are arranged at the upper end of the power amplifier body (1), and the two protective plates (17) are arranged on both sides of the transformer module (13) respectively.
6. The vacuum tube power amplifier with external noise adjustment function according to claim 1, characterized in that: A plurality of supporting feet (18) are arranged at the bottom of the power amplifier body (1), and a soft pad (19) is arranged at the bottom of each of the plurality of supporting feet (18).
7. The vacuum tube power amplifier with external noise adjustment function according to claim 5, characterized in that: The upper end of the power amplifier body (1) is provided with a mounting groove (20), and the bottom of the protection cover (2) is snap-fitted into the mounting groove (20).
8. The vacuum tube power amplifier with external noise adjustment function according to claim 7, characterized in that: The rear end of the protective cover (2) abuts against the transformer module (13) and the protective plate (17).
9. The vacuum tube power amplifier with external noise adjustment function according to claim 8, characterized in that: The protective cover (2) is provided with an observation port (21), the observation port (21) is exposed at the front end surface and the upper end surface of the protective cover (2), and the surface of the protective cover (2) is provided with a plurality of heat dissipation strip holes (22).
10. The vacuum tube power amplifier with external noise adjustment function according to claim 9, characterized in that: The top plate (5) is provided with a control panel (23) corresponding to the observation port (21); the cross-sections of the control panel (23) and the observation port (21) are both trapezoidal; the protective cover (2) has two inclined panels (25) arranged opposite to each other; the two inclined panels (25) are both located at the front end of the observation port (21) and respectively abut against two sides of the control panel (23).