Yamamoto Sound Craft 7P Tube Socket for 4E27/813

This item will be made to order. The estimated shipping date is around 2 business days. Shipping may be delayed depending on the manufacturer's stock status.

Jumbo 7P specification compatible with 4E27 and 813 tubes

This product is a jumbo-sized 7P tube socket compatible with 4E27 and 813 tubes. It is designed with sufficient mechanical strength and reliability, assuming use with large tubes that operate at high voltage and high current.

The mounting hole diameter is 55mm φ, with screw spacing of 48mm × 4, enabling secure installation on large chassis.

Fluororesin body supporting high-precision hold

The socket body is made by machining fluororesin (PTFE). This material has extremely high electrical insulation and low dielectric constant, as well as excellent heat resistance, making it suitable for high-heat tube applications. The circular machined pin fixing structure securely holds the vacuum tube, preventing contact failure and sound quality degradation due to vibration.

Pin structure achieving stable electrical contact

The pins are made of phosphor bronze, which provides excellent strength and spring properties, maintaining stable contact pressure over long-term use. In addition, a non-magnetic base treatment is applied, followed by thick gold plating to reduce contact resistance and improve resistance to aging. The design minimizes magnetic materials, reflecting a principle that prioritizes signal purity for audio use.

Brings out full performance when combined with heat dissipation design

Since 813 and 4E27 generate significant heat, applying adequate heat dissipation measures when using this socket allows the vacuum tube to operate stably at its intended performance. The combination of rugged structure and high-quality materials makes this a reliable core component for long-term use in large tube amplifier construction.