6D10compactron, containing three high-mu triodes with separate pin connections for all three cathodes, grids, and plates in a compact T-9 glass envelope. It is especially designed for use as an oscillator-mixer, grounded-grid amplifier, and automatic frequency control service.
6D6Remote-Cutoff R.F. Pentode. Most common commercial uses were as an I.F. amplifier or as a superheterodyne mixer, aka 1st detector. Also used in test equipment. Has UX6 base with top cap. Based on type 58, which had a 2.5 volt heater. Similar to type 78. Octal version: 6U7-G.
6DA6EF89R.F. Pentode used in AM/FM radios manufactured outside North America.
6DB6Vacuum Pentode RF/IF-Stage Controlling (mu) – Miniatur-7-Pin-Base B7G
6DC6low power pentode tube that’s perfect for audiophiles looking to enhance their sound system. Its musical characteristics are impressive, delivering a warm and detailed tone with a smooth and balanced response. The technical side is equally impressive, with a low plate resistance and high amplification factor. Miniatur-7-Pin-Base B7G
6DE7miniature double triode in the 9 pin miniature construction. Section #1 is intended for use as a vertical deflection oscillator having medium mu and section 2 is intended for use as a vertical reflection amplifier with low mu.
6DK6 SYL low power pentode tube that packs a punch when it comes to musical performance. This vacuum tube is known for its clear and balanced sound quality that audiophiles crave. It’s particularly versatile, with the ability to deliver clean and undistorted audio across different frequencies.
6DL4EC88powerful low power triode tube that offers exceptional musical characteristics for audiophiles. This tube features a high gain factor and low noise performance, making it ideal for use in audio amplification circuits
6DL6EL91high-frequency tube that offers exceptional performance for audiophiles seeking high-quality sound reproduction. This tube features a single-ended design and a pentode arrangement, creating a clear and natural sound that emphasizes the musical characteristics of recordings.
6DS8ECH83Triode-Heptode Local oscillator-Mixer which will operate with 12v anode supply, used in car radios which run directly off the 13.5 volt supply.
6DT5 SYLdesigned for a variety of applications including radios, guitar amplifiers, and other audio amplifiers
6DX8ECL84Triode pentode
6EW6straight pentode with a high mutual conductance. Although not of the vari-μ type it was designed for IF amplifier service in TV receivers. Miniatur-7-Pin-Base B7G
6F7Remote Cutoff Pentode, Medium-mu Triode. Has UX7 base with top-cap connection for the pentode’s control grid (grid 1). Most common uses were as superheterodyne mixer (“first detector”) and local oscillator, or as a combination I.F. amplifier (pentode) and (second) detector or A.F. amplifier (triode). Octal version: 6P7-G.
6F8 cathode type twin triode designed for use as a voltage amplifier. Electrical characteristics of the individual sections of this tube are identical to those of type 6J5G.
6GV8ECL85Triode Pentode(Used in Vertical Output stages in Australian 1960s TVs)
6GW66DQ8Bhigh-perveance beam power pentode designed for use as a horizontal deflection amplifier tube in high efficiency deflection circuits of television receivers. Thermal characteristics of the heater are controlled such that heater voltage surges during the warm-up cycle are minimized provided it is used with other tubes are similarly controlled.
6GX8EAM86indicator and magic eye tube is a premium electronic component that is designed for audiophiles who demand the best in their audio equipment. This tube features excellent musical characteristics that will enhance the overall sound quality of your amplifier.
6H6Dual Diode. Octal base. Most commonly found as a “stubby” metal envelope tube. Glass versions 6H6-G and 6H6-GT are also found.
6HG8ECF86Designed to be used as a VHF oscillator and mixer in TV receivers.
6J11 GEcompactron device containing two sharp cutoff pentodes, designed primarily for intermediate-frequency amplifier service in television receivers.
6J5general-purpose triode designed for use as a detector, amplifier, or oscillator. Features of the 6J5 include a relatively high transconductance and a medium amplification factor. It is well suited to resistance-coupled service, having high output voltage capabilities.
6J7EF36 metaalSharp Cutoff Pentode. Most common commercial uses were as a tuned R.F. amplifier, a (second) detector, or an A.F. amplifier. Octal version of type 77. This type included a top-cap connection for the control grid. Later version, type 6SJ7, had its control grid connection on pin 4.
6JE6Designed originally as a horizontal deflection amplifier tube for TV receivers.
6JX8ECH84high-quality triode-hexode/heptode/octode tube designed for audio applications.
6K6Power Pentode, octal version of type 41. Low-to-moderate power output rating—0.35 to 4.5 watts (single-ended Class A circuit); 10.5 watts max. (push-pull Class A circuit).
6K7Remote Cutoff R.F. pentode. Most common commercial uses were as an I.F. amplifier or as a superheterodyne mixer, aka 1st detector. Also used in test equipment. Octal version of type 78. This type included a top-cap connection for the control grid. Later version, type 6SK7, had its control grid connection on pin 4.
6K8triode oscillator and a hexode mixer in a common envelope. The physical design of this tube reduces interaction between the oscillator and mixer sections and makes for stable operation in superheterodyne receivers on the high frequencies as well as the broadcast band.
6L65881High-powered beam-power pentode. There are several variations. Except for types 6L6-GC and 6L6-GX, all have the same maximum output ratings—11.5 watts (single-ended Class A circuit); 14.5 watts (push-pull Class A circuit); 34 watts (push-pull Class AB1; 60 watts (push-pull Class AB2 circuit). Types 6L6 and 25L6 were introduced in 1935 as the first beam-power pentodes. Both types were branded with the L6 ending to signify their (then) uniqueness among audio output tubes. However, this is the only similarity between the two tubes. (Type 6W6-GT is the 6.3 volt heater version of types 25L6-GT and 50L6-GT.)
6L7Pentagrid Mixer often used in console radios of the late 1930s. Similar in structure to pentode-triode pentagrid converters 6SA7 and 6BE6, except that a separate oscillator—usually type 6C5 — is required. Also, grid 1 is remote cutoff control grid, grid 3 is oscillator input grid. (In types 6SA7 and 6BE6, grid 1 is the internal oscillator grid, grid 3 is the control grid.) Because of low conversion transconductance, radios using type 6L7 typically have either a tuned RF pre-amplifier stage, or at least two stages of I.F. amplification. (A few models have both.)
6M11double triode-pentode, which means it combines the benefits of both types of tubes. The triode section offers great gain and linearity, while the pentode section provides high power output and efficiency. With a maximum plate dissipation of 9 watts, the 6M11 can deliver plenty of power. Duodecar 12-pin, B12C Glass
6N1P EV Russian-made miniature 9-pin medium gain double triode vacuum tube intended for use as a line audio amplifier and cathode driver. Noval, 9 pin miniature (USA pico-9)
6R3EY81Television “Damper/ Efficiency” Diode
6R7Dual Diode, Medium-mu Triode (also 6R7-G and 6R7-GT). Octal base with top cap. Miniature version — 6BF6. Amplification factor: 16.
6SA7 GT TUNFirst pentode-triode style pentagrid converter. Octal type. Miniature version: 6BE6.
6SF5high gain triode designed for RC coupled voltage amplifier use in audio equipment, especially vehicle battery powered sets. Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vl)
6SG7type 6SG7 was designed for wideband RF and IF amplification and has a relatively high gm value to ensure a good gain-bandwidth product.
6SH7wideband RF and IF amplification and has a relatively high gm value to ensure a good gain-bandwidth product.
6SJ7sharp-cutoff pentode vacuum tube with an octal base, commonly used in audio and RF amplifier applications and as a biased detector or high-gain amplifier. It features a 6.3V heater and a 0.3A heater current, and its electrical characteristics are identical to the 12SJ7, except for the heater ratings. The 6SJ7 is known for its pleasing tonal characteristics, particularly in the mid-range, and has been used in various vintage amplifiers, including early Fender models like the Bassman 5A6 and Champ 5C1.
6SK7Remote-cutoff pentode (Used in I.F. stages of North American radios) Miniature version: 6BD6
6SL7Twin triode (Used in Television and general electronics)
6SN7Medium-mu twin triode (Used in Audio Amplifiers, Hammond Organs and Television; extensive use in World War II radar) Each section is equivalent to a 6J5. Miniature version: 12AU7
6SQ7metal duplex-diode high-mu triode. It is intended primarily for use as a combined detector, amplifier, and automatic-volume-control tube in radio receivers. The triode section incorporates a high amplification factor and is capable of providing a relatively large undistorted output voltage from a very small input signal.
6U3EY80various applications, including as a damper, booster, and flyback diode in electronics, and is a popular choice for vintage radio enthusiasts.
6U8triode-pentode vacuum tube popular in audio applications, known for combining a smooth, warm triode section with a clear, powerful pentode section. It was designed for various functions in radio and television receivers, including local oscillator-pentode mixer applications, and is still sought after by audiophiles for its performance in amplifiers and preamps.
6U8ECF82triode-pentode vacuum tube popular in audio applications, known for combining a smooth, warm triode section with a clear, powerful pentode section. It was designed for various functions in radio and television receivers, including local oscillator-pentode mixer applications, and is still sought after by audiophiles for its performance in amplifiers and preamps.
6V6 EL HARMBeam power tetrode, used in single-ended class A audio output stages of radios and sometimes seen in class B audio amplifiers. (see also: 5V6 and 12V6) Electrically similar to 6AQ5/EL90.
6V7Dual Diode, Medium-mu Triode. octal-based vacuum tube, often found as a vintage “NOS” (New Old Stock) item, meaning it was manufactured in the past but never used. It is a versatile tube, and the “6V7G” designation refers to its specific configuration and characteristics, commonly featuring a clear glass, black plate, and foil getter. While not a common modern tube, it can be found from various vintage manufacturers like Tung-Sol, RCA, Sylvania, and GE. It is sometimes used as a substitute for the rare 85M tube . Octal version of type 85. Amplification factor: 8.3. Similar to type 6R7.
6X2EY51Half-Wave Vacuum Rectifier Power-supply
6X5EZ35Full-wave rectifiers with indirectly heated common cathode. Type 6X4 has a 7-pin miniature base, the 6X5 has an octal base. Based on type 84/6Z4.
6Y6triode tube that offers a low-to-medium power output. They are versatile and can be used in a range of audio equipment, including hi-fi amplifiers, guitar amplifiers, and more. Additionally, they have a relatively high plate voltage and a low current draw, making them more efficient than other tubes. What sets these tubes apart is their ability to produce a rich and dynamic range of sound. They are known for their smooth distortion characteristics, which create a unique and complex tonal quality. This makes them particularly well-suited for enhancing the musical characteristics of recorded music
7A8: Octode converter