Re-issue, made by New Sensor in Russia. New Sensor purchased the the Tung-Sol name and trademark, and have begun making new production tubes, using the Tung-Sol brand. These tubes sound great, they stay quiet and have been solid and reliable. Great detail and depth.
Platinum grade - The best of the best. Lowest noise and microphony with the tightest triode balance we have available. This is typically 10% or tighter, but may be higher depending on available stock.
Gold grade - Low noise and microphonics with a triode balance typically between 15% and 20%, but may be higher depending on available stock.
Driver/Buffer grade - Lowest noise but not the lowest in microphony. Triode balance will be similar to Gold grade.
This grade is only suitable for use in the driver stage of an amplifier, or the output/buffer stage of a DAC or CD Player.
Price includes matching in any quantity you need at no extra charge.