Vacuum tube with 'ECC89' marking on a white background

JJ Electronics

JJ ECC99 Preamp Vacuum Tube

$25.16 $27.95
In stock
Quantity:

The JJ ECC99 is a versatile double triode vacuum tube engineered for demanding audio applications. Ideal as a driver stage for power triodes like 300B and 2A3, it excels in output stage designs, headphone amplifiers, preamplifiers, and CD players. Perfect for small-format push-pull triode amplifiers running Class A topology (10W configurations with 4x ECC99), it also serves as a parallel voltage supply tube. A direct substitute for 5687, E182CC, 6840, and 6BL7 tubes, the ECC99 delivers the reliability and sonic characteristics Ruby Tubes customers expect from premium tube stock.

Matched Sets

Each tube is individually tested, measured, and precisely matched to the same milliamp to ensure consistent electrical performance across every set. This careful matching process promotes balanced operation, reliable response, and long-term stability in your amplifier. Precision milliamp matching is a standard part of our quality control and is included at no additional cost.

Matched Sets

Each tube is individually tested, measured, and precisely matched to the same milliamp to ensure consistent electrical performance across every set. This careful matching process promotes balanced operation, reliable response, and long-term stability in your amplifier. Precision milliamp matching is a standard part of our quality control and is included at no additional cost.

Carefully Tested

Every tube is subjected to a comprehensive testing process using custom-designed, calibrated equipment to evaluate key electrical and performance characteristics. Each tube is measured for proper operation, stability, and consistency before it is approved for sale. This thorough testing ensures that only tubes meeting our strict performance standards are shipped, providing dependable operation and long service life.

Carefully Tested

Every tube is subjected to a comprehensive testing process using custom-designed, calibrated equipment to evaluate key electrical and performance characteristics. Each tube is measured for proper operation, stability, and consistency before it is approved for sale. This thorough testing ensures that only tubes meeting our strict performance standards are shipped, providing dependable operation and long service life.

Burned in

Every tube is subjected to a controlled burn-in process at no additional cost prior to shipment. During burn-in, tubes are operated under load for an extended period to identify early failures and ensure stable, reliable performance. This process helps eliminate weak or unstable tubes before they ever reach your amplifier.

Burned in

Every tube is subjected to a controlled burn-in process at no additional cost prior to shipment. During burn-in, tubes are operated under load for an extended period to identify early failures and ensure stable, reliable performance. This process helps eliminate weak or unstable tubes before they ever reach your amplifier.