What is an Octal K8A PCB-mount tube socket?

An Octal K8A PCB-mount tube socket is an 8-pin tube socket designed for direct installation on a printed circuit board (PCB). It provides the electrical and mechanical connection between an octal tube and the amplifier circuit and is widely used in modern tube amplifiers, audio equipment, and service projects. Unlike chassis mounting, the tube is supported by the PCB in this design, which makes socket form factor and mechanical stability especially important.

Where are octal PCB-mount sockets used in audio technology?

Octal PCB-mount sockets are used in hi-fi power amplifiers, preamps, tube radios, as well as studio and measurement equipment when a compact and reproducible PCB-based construction is required. Typical applications include devices with octal tubes or rectifier tubes built into modern layouts. Many octal tubes are mechanically socket-compatible, but not always electrically interchangeable—therefore the device specification must always be considered when replacing tubes.

What advantages does Octal K8A PCB mounting offer compared to chassis mounting?

Octal PCB mounting allows a space-saving and production-friendly integration into PCB-based tube equipment. It is often chosen for compact device designs or when OEM concepts require standardized assembly. In high-end audio, clean PCB routing and stable contacts can support operational reliability and signal quality.

Which technical criteria are decisive when selecting an octal PCB socket?

Key factors include contact material, dielectric strength, temperature resistance, and the mechanical durability of the PCB pins. Octal tubes often operate at high anode voltages and currents, so insulation and contact quality must be reliable. It is also essential that the socket matches PCB drilling patterns, pin spacing, and the available installation height inside the device.

How does replacement work in a repair situation?

Replacing an octal PCB-mount socket is advisable if contacts are worn, thermally damaged, or mechanically unstable. The replacement must be electrically compatible and have the same pinout as well as matching PCB dimensions (pin circle and pin diameter). After replacement, solder joints, insulation, and mechanical stability should be checked to prevent secondary damage to tubes or power-supply components.

Why is Octal PCB mounting important for professional users (B2B)?

For service providers, OEMs, and developers, octal PCB sockets are important because they enable reproducible series production and predictable spare-part supply. Especially in long-life audio equipment, stable quality is essential to minimize failures and contact issues. A documented selection by specification simplifies maintenance and ensures consistent results across multiple devices.

What about availability and delivery in Germany/Europe?

Octal K8A PCB-mount tube sockets are typical spare parts for tube amplifiers and audio circuits. In Germany and Europe, demand remains continuous because many devices are operated long-term and serviced regularly. End customers benefit from clear selection guidance, while professional users rely on consistent specifications and dependable replenishment. International delivery is relevant for exported devices and worldwide service cases.

Socket Octal K8A Print-PCB

Oktal Print Kelchfeder Fassung Standard 8-Pin Röhrensockel

Octal K8A PCB socket with nickel-plated spring cup contactsFor tube amplifiers, Hi-Fi, guitar amps, studio and power suppliesOctal K8A, 8-Pin Octal, Octal PCB Socket and K8A Tube SocketSpring cup contacts, Ø 26.5 mm PCD, 8 × Ø 2.5 mm PCB holes

From €1.40

incl. VAT plus shipping costs

Delivery time: ca. 1 - 5 days

Volume prices

Oktal K8A Printfassung K8A Gabelfeder PCB Keramik Sockel

Octal K8A PCB socket with silver-plated fork-spring contacts PCBFor tube amplifiers, Hi-Fi, guitar amps, studio and test equipmentOctal K8A, 8-Pin Octal, Octal PCB Socket and Valve Tube Socket for PCBFork-spring contacts, Ø 26 mm PCD and 8 × Ø 2.5 mm THT PCB drill holes

From €1.40

incl. VAT plus shipping costs

Delivery time: ca. 1 - 5 days

Volume prices

Oktal Print Belton Micalex

Octal K8A 8-Pin tube-valve-socket use for: PCB (PC-board) mounttube example: EL34-6L6GC-6550C-KT88-KT120-KT150-5U4G-GZ34-6SL7GT-6SN7GTvery good contact material - for reliable applications (mobile use,etc.)with extra screw mounting possibility for extra strong connection to PCBPin PCB Diameter about 18mm - for 1,5mm holesrunning production

€2.90

incl. VAT plus shipping costs

Delivery time: ca. 1 - 5 days

Oktal Print 8pol Goldpin K8A Kelchfederkontakte - Keramik

Octal goldplate K8A 8-Pin tube-valve-socket use for: PCB (PC-board) mountube example: EL34-6L6GC-6550C-KT88-KT120-KT150-5U4G-GZ34-6SL7GT-6SN7GTrecommend pinout diameter: 26-28mm, recommend Pin whole: 2,5mm

From €2.50

incl. VAT plus shipping costs

Delivery time: ca. 1 - 5 days

Volume prices

Oktal Print Goldpin 8pol K8A Gabelfederkontakte - Keramik

Octal goldplate K8A 8-Pin tube-valve-socket use for: PCB (PC-board) mountube example: EL34-6L6GC-6550C-KT88-KT120-KT150-5U4G-GZ34-6SL7GT-6SN7GTrecommend pinout diameter: 26-28mm, recommend Pin whole: 2,5mm

€2.70

incl. VAT plus shipping costs

Delivery time: ca. 1 - 5 days

Oktal Print lange Pins: 20mm Chassis Mount

Octal K8A 8-Pin tube-valve-socket use for: PCB (PC-board) mounttube example: EL34-6L6GC-6550C-KT88-KT120-KT150-5U4G-GZ34-6SL7GT-6SN7GTextra long Pins when socket should have more distance to the PCB (+20mm)

From €1.60

incl. VAT plus shipping costs

Delivery time: ca. 1 - 5 days

Volume prices

Oktal Print Spezial 8pin Keramik Ausführung

Octal K8A 8-Pin tube-valve-socket use for: PCB (PC-board) mounttube example: EL34-6L6GC-6550C-KT88-KT120-KT150-5U4G-GZ34-6SL7GT-6SN7GTspecial version for automatic soldering prozesses

€1.70

incl. VAT plus shipping costs

Delivery time: ca. 1 - 5 days

Oktal Print BELTON PCB Spezial für automatische Bestückung

tube example: EL34-6L6GC-6V6GT-6SN7GT-6SL7GT-7591-6550C-KT88-KT120-KT150use for: PCB Auto Wave Solder

€2.80

incl. VAT plus shipping costs

Delivery time: ca. 1 - 5 days

Oktal Draht Goldpin 8pol K8A Gabelfederkontakte - Keramik

Octal goldplate K8A 8-Pin tube-valve-socket use for: chassis mounttube example: EL34-6L6GC-6550C-KT88-KT120-KT150-5U4G-GZ34-6SL7GT-6SN7GTrecommend pinout diameter: 26-28mm, recommend Pin whole: 2,5mm

€2.70

incl. VAT plus shipping costs

Delivery time: ca. 1 - 5 days