Ray Tubes KT88 SELECT

Description

A New Dimension of Sound

The SELECT Collection not only maintains the exceptional manufacturing quality of the CORE Collection but makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.

Make Your Good Amp Great

The SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.

The SELECT Vacuum Tube Difference

Despite originating from the same batches as Ray Tubes’ CORE Collection, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.

Gold Pins: Excellence in Every Detail

Gold pins not only add a touch of elegance but also serve a significant purpose. Gold’s superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren’t just top-notch—they’re built to last.

Ceramic Collar: Nothing Better Than a Classic

Sometimes, doing things the old way is better. And when it comes to building materials, there are few things older than ceramic, which has been beloved by humans for its resilience and heat resistance for over 30,000 years. Ray Tubes chose premium ceramic for the collar of the KT88 Select because it’s incredibly resilient against high temperatures, making it an ideal material for vacuum tubes, which can generate a lot of heat during operation. Plus, ceramic is robust against wear and tear, making it able to withstand the rigors of regular use for years to come.

Silk-Screen Printed Logos

Even the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’  commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.

Superior Sound, Secured

An exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.

Technical Specifications:

• Tube Type: KT88
• Tube Socket: 8-pin
• Max Anode Dissipation Power: 42 W
• Max Screen Dissipation Power: 8 W
• Max Anode + Screen Dissipation Power: 46 W
• Max Anode Voltage: 800 V
• Max Screen Voltage: 600 V
• Max Grid Voltage: ~200 V
• Max Cathode Current: 230 mA
• Heater Voltage: 6.3 V
• Heater Current: 1.6 A
• Transconductance: 12 mA/V
• Amplification Factor: 8
• Total Height: 119 mm

Tetrode Connection

• Screen Voltage: 250 V
• Anode Voltage: 250 V
• Anode Current: 140 mA
• Grid Voltage: 15 V
• Grid Current: 3 mA
• Internal Resistance: 12 kΩ
• Amplification Factor: 8

Triode Connection

• Anode Voltage: 250 V
• Anode Current: 143 mA
• Grid Voltage: 15 V
• Internal Resistance: 670 Ω
• Amplification Factor: 8