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JJ5751
ⓘ Please call for current stock updates before visiting us in-store.
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.
| 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 |
Shipping Policy
Orders that may incur a shipping surcharge:
Customers outside of Australian Metro areas please be advised that we cannot offer free shipping on bulky items to certain rural areas.
If this applies to your order we will be in contact ASAP after checkout. This may result in a partial shipping cost after checkout or orders being refunded and cancelled due to our usual courier services being unable to service certain rural areas.
We apologise in advance if this affects you. Please feel free to contact us prior to checkout for more information.
Drop Ship Orders Drop ship orders are shipped directly from our Australian based suppliers. Please allow for 1-2 extra business days for drop ship orders to be dispatched.
Delivery Time Orders are dispatched within 1 -2 business days and usually takes 2-5 business days to arrive within Australia. If for any reason there may be a delay, we will contact you within 2 business days. Delivery times may take longer for rural/ remote areas.
If you have any concerns, or require an item to be delivered by a certain date, please contact us so that we can try our best help you receive your order on time.
Tracking Your Order Tracking details will be emailed to you as soon as your order has been processed for shipping. If you are having trouble tracking your order, please feel free to contact us for assistance!
Returns Procedure
Once your return is received and inspected, we will be in contact to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund. If you are approved, we will process the return as a refund, exchange or store credit as quickly as possible.
30-Day Returns Policy Here at Sky Music, we want you to be 100% happy with your purchase. If you are not satisfied with your new product for any reason you may return it for a refund, exchange or store credit within 30 days of purchase. Please see the full policy for conditions, exemptions and procedures. For metro-Melbourne orders we charge a flat rate of $18 for change of mind swaps and exchanges & returns and staff will advise for interstate, rural and Victorian areas outside of the metro-Melbourne area.
DISCLAIMER: The 30 Day Returns Policy stated above is not a comparison or 'try before you buy' style service. Sky Music reserve the right to refuse a return we believe may be an abuse of this policy. Sky Music reserve the right to revoke return privileges to any one individual abusing this 30 Day Returns Policy, i.e. with multiple returns in a short period of time without a valid reason. The 30 Day Returns Policy does not extend to orders made under a Studio 19 Rental agreement. Please see Studio 19 terms & conditions for their return policy.
Pricing
Advertised prices only apply to items currently in stock and ready to ship. Items that are out of stock, sold out or otherwise unavailable are subject to price changes that may be because of price rises and market fluctuations that are outside of Sky Music's control.
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