Psvane ACME Series AKT88 Valves - Matched Pair in Limited Edition Presentation Box.

With gold pins and gold grid, teflon base, anodised aluminium shell.

The ACME range stands for top notch quality and also utilises new production technology and new ways manufacturing tubes dedicated to audio excellence.

There is no doubt that you can expect extraordinary performance from the new ACME KT88. It plays with a lightness and warmth, yet is detailed, deep and powerful.

Like all ACME tubes, the KT88 benefits from a few hours of break-in time to achieve the full depth and finesse of sound.

Depending on the system and subjective listening preferences, you may consider about 50-200 hours.

PSVANE mentioned these desgin facts as a remarkable details:

• 5+ years of R&D poured in to create this Supreme series and world's first 3D designed tube structure.
• Patented hybrid plate design - combination of graphite and mesh material first time used at the same time on high power output tubes (845, 211, 805) to achieve synchronized expansion even at 600 Celsius temperature, high emission capacity, and super stability.
• Special shaped glass enclosure exclusivly used for ACME KT88 to allow quick and efficient heat dissipation and enhanced stability.
• Teflon base with sand blasted aluminum cover.
• German solder used in pin connection and of course, gold plated pins.

SPECIFICATIONS

ACME KT88

HEATER

Uh-----------------6.3   V

Ih------------------1.6   A

MAXIMUM RATING          RATING  MAXIMUM

Ua----------------------------  800     800       V

Ug2--------------------------  600      600       V

Ug1--------------------------  200      -200      V

Pa----------------------------  42       35       V

Pg2--------------------------   8        6        W

Pa+Pg2---------------------   46       40       W

Ik----------------------------  230      230      mA

Uhk-------------------------  200      250      V

Tglass shell-------------------  250      250  °C

Rg1

Cathode bias  

Pa + Pg2 35W----------0.47   MΩ

Pa +Pg2 > 35W ---------0.27   MΩ

Fixed bias    

Pa +Pg2 35W ----------0.22   MΩ

Pa +Pg2> 35W ----------0.10   MΩ

CAPACITANCES

          Pentode connection    Triode connection

Cin---------------16           9.3         PF

Cout-------------12           17          PF

Cg-a-------------1.2          7.9         PF

CHARACTERISTICS

Pentode connection

Ua----------------250   V

Ug2--------------250   V

Ia----------------140   mA

Ig2(approx)----3    mA

-Ug1(approx)--15    V

Gm---------------12   mA/V

ri -----------------12    KΩ

μg1-g2-------- 8

Triode connection

Ua.g2-------------250   V

Ia+g2-------------143   mA

-Ug1(approx)---15    V

Gm----------------12   mA/V

Ri------------------670   Ω

μ------------------ 8