What is the 6V6S vacuum tube?

The 6V6S is a tetrode vacuum tube designed for power (se/pp) applications. Sovtek production..

What is a 6V6S substitute or equivalent?

Direct equivalents to the 6V6S include 6V6GT. These share the same pinout and operating envelope, so they can usually be swapped without circuit changes — though batch-to-batch variations between manufacturers (NOS vs current production) may shift the sonic character noticeably.

What are the key specifications of the 6V6S?

Transconductance gm ≈ 4.1 mA/V, plate resistance rp ≈ 50.0 kΩ, max plate voltage 500 V, max plate dissipation 14 W, heater 6.3 V / 0.5 A.

Is the 6V6S still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 6V6S as Common availability. NOS (new-old-stock) examples from RCA, Mullard, Tung-Sol, GE, Sylvania and Telefunken trade among collectors; modern production where it exists comes mostly from JJ Electronic, Electro-Harmonix, Tung-Sol (New Sensor), Genalex, and a handful of small-batch makers.

What does the 6V6S sound like?

Sovtek production.. Sonic character also depends heavily on the circuit operating point, the surrounding tubes in the stage, and the output transformer when present — use the interactive loadline calculator on this page to explore the trade-offs.