A.F. DOUBLE TRIODE – 5751 can be used in most 12AX7 circuits to achieve more headroom. It has a lower gain than the standard 12AX7. Good to rope the gain of a high gain amplifier.
JJ Electronic is a world-renowned manufacturer of vacuum tubes, electrolytic capacitors and high-end audio amplifiers. Founded in 1993 by Jan Jurco, a small garage business grew to become a well known and respected in music industry.
JJ vacuum tubes and capacitors are widely used in guitar and audio amplifiers, recording studio equipment and in a variety of applications for audiophiles.
We offer more than 35 preamp, power and rectifier tubes. All tubes were developed by our in-house research and engineering teams. In addition, we manufacture electrolytic capacitors for different voltages, both radial and axial types. Today, our manufacturing program also includes a number of high-end audio and guitar tube amplifiers. All of our products are the result of diligent research in the audio field and its continual application into manufacturing.
We are proud of the fact that every component used in our vacuum tube production is manufactured in-house. This enables us to have complete quality control of every part of the manufacturing process. All materials used in tube and capacitor production undergo a meticulous cleaning process such as ultrasonic cleaning, annealing in protective atmosphere and reactive rinsing. The assembly process is carried out by a combination of meticulous manual operations and state-of-the-art production processes.
All vacuum tubes and capacitors go through an extended burn-in period to ensure superior stability. A rigorous final test for tubes and capacitors verifies every important parameter. In particular, the parameters for flawless tube functioning include insulation characteristics, vacuum level, cathode emission efficiency, filament voltage, plate currents, and microphonics. The quality control process includes several thousand hours of reliability testing on samples of tubes and capacitors.
By using our tubes and capacitors in our own line of audio amplifiers, we continually verify their quality and performance in the practical applications.
Specs
| Body Height | 49.2 mm |
| Filament Current (If) | 350 / 175 mA |
| Filament Voltage (Uf) | 6.3 / 12.6 V |
| Gain (μ) | 70 |
| Grid Voltage (Ug) | ≥ -50 V, -1 V typical |
| Grid capacitance (cg1) | 1.6 pF |
| Grid to Plate Capacitance (ca/g) | 1.7 pF |
| Internal Resistance (Ri) | 58 kΩ |
| Item Diameter | 22 mm |
| Item Height | 56.3 mm |
| Plate Capacitance (ca) | 0.33 pF |
| Plate Current (Ia) | 0.8 mA |
| Plate Dissipation (Wa) | ≤ 1 W |
| Plate Voltage (Ua) | ≤ 300 V, 100 V typical |
| Transconductance (S) | 1.2 mA/V |
Fast Shipping and Professional Packing
We offer a wide range of shipping options due to our long-running partnerships with UPS, FedEx and DHL. Our warehouse personnel are well educated and will package the items according to our exact and precise specifications. Your goods will undergo an exhaustive examination before they will be securely packaged before being shipped. We ship to hundreds of thousands of customers every day across different countries. This is a testament to our dedication to being the biggest online retailer in the world. The warehouses and centers of distribution are located in Europe and the USA.
Orders that contain more than one item are assigned processing periods in accordance with the item.
Prior to shipping, we check the item thoroughly before sending the items. The majority of orders will be delivered within 48 hours. The time to deliver varies from 3-7 days.
Returns
The inventory is always changing and we do not control it completely due to the fact that many parties are involved, which includes our warehouse and factory. This means that the actual stock could change at any time. It is possible that you will not receive your order after it has been placed.
Our policy lasts thirty days. If it's been more 30 days since you made your purchase, we unfortunately can't give you a full refund or exchange.
You are able to return an item if it is unused and is in the same condition when you received it. You must have the item in its original packaging.
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