NOS 1959 Sylvania JHS-5751WA Preamp Tube – Triple Mica, Black Plates, D Getter - Awesome

Listing details

For sale: Sylvania JHS 5751WA Triple Mica Vacuum Tube

Item Description:

Available is a new old stock (NOS) Sylvania JHS 5751WA vacuum tube, recognized for its durability and consistent performance. Sylvania's premium line, subjected to stringent testing to meet high-quality standards. ​

Performance Details:

Tested on a Triplett 3444 tube tester (minimum good: 780 Gm; average new: 1,200 Gm), this tube yielded:​

Section 1: 1,495 Gm, 1.2 mA​

Section 2: 1,410 Gm, 1.1 mA​

These readings indicate strong emission and balanced operation between sections.​

Condition:

Physical: Unused condition with intact gold lettering.​

Electrical: Tested for shorts and leakage; confirmed low noise and non-microphonic, suitable for audio applications like headphone amplifiers.​

Date and Manufacturer Codes:

Date Code: 9 47 (likely indicating production in the 47th week of 1959)​

Manufacturer Codes: 591A and 312E (Sylvania)​

Packaging:

Includes original United States Air Force (USAF) Sylvania tube box.​

Additional Information:

Sweet, smooth, nice mids, quiet, musical.

Goes well with:

Crate V30H

Conrad Johnson PV12A + Premier 11A, Premier 8

Conrad Johnson MV75A1 1983

Jolida 1301 hybrid amplifier

PEAVEY CLASSIC 30

The Sylvania 5751WA is known for its balanced and detailed sound profile, offering a wide soundstage with excellent imaging. It's warm and vibrant midrange provides a natural timbre to vocals and instruments, while the clean, extended highs ensure an engaging listening experience without fatigue. ​

At VTubeAudio, we ensure all our tubes are thoroughly tested for quality and reliability.

Note:

Box has one tab end missing and also has 12AX7 written on it.

SKU C3-1 88390436