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Vacuum Tube - 5751, JJ Electronics
The JJ Electronic 5751 is a dual triode that can be used in place of most 12AX7 circuits. The rugged build of this tube and reduced gain (30% less than a 12AX7) can improve headroom and give better control in high gain stages allowing users to more easily dial in sweet spots. The JJ 5751 features a smooth and balanced tone and a detailed response with low noise and low microphonics.
SKU:
T-5751-JJ
Item ID:
008542
UPC/EAN:
609722134255
JJ Electronics Part Number:
5751
Brand:
JJ Electronics
Type:
Accessory Items:
| 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 |
| Packaging Dimensions | 0.9 in. × 0.9 in. × 2.3 in. | |
| Weight (Packaging) | 0.05 lbs. |
 Specification Sheet | All Models |
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Specifications, Files, and Documents
Questions and Answers
Click each question to see its answers.
1 answers
Is the P-ST9-600 9-pin mini socket the correct socket for a 5751 JJ preamp tube?
Asked by mikeb4 on December 29th, 2015.
December 30th, 2015
Staff MemberTop Contributor
Yes, the P-ST9-600 socket is compatible. Depending on your needs and specifications most 9-pin miniature sockets will work.
1 answers
What is the correct socket for the 5751 JJ preamp tube?
Asked by mikeb4 on December 29th, 2015.
December 30th, 2015
Staff MemberTop Contributor
Depending on your needs and specifications most 9-pin miniature sockets will work.
1 answers
Will these work with the budgie tube phono preamp?
Asked by Anonymous on May 12th, 2017.
If your amp calls for a 12AX7 the 5751 should work as it is a compatible tube.
Product Reviews
With most new tubes, I initially hate that way they sound. Takes a while for them to burn-in and sometimes I never get the sound or tone I was looking for. I've been through all sorts of new production and NOS tubes through the years. It's very rare that I will find a tube that I actually like to listen to right away. These JJ 5751's fit the category of "enjoy listening to now". I'm honestly surprised because I bought these to use as substitute for some very nice quality NOS tubes. I figured I would use the JJ 5751's for a while to preserve my expensive NOS tubes. The JJ's sound so nice, I may just leave them in there and sell the NOS tubes. Running them in a Jolida 3502S Integrated Amp, with JJ 12AT7 gold pin driver tubes s and Gold Lion KT77 power tubes.
Added 2 to a 6505MH and they provide a much wider range of use on the gain.
nice tube, immediately tamed my peavey valvekings harshness to cream
Bought a couple of these to use in the preamp of my Orange OR-15. I really like the sound and they give you just a little more headroom range on the gain knob.
So far I'm pretty pleased. Running it in V1 to calm down the preamp drive in a 15w tube combo. Definitely does the trick. Going to have to play with the other tubes a bit because the volume took a noticeable step back. Running with a JJs 12AX7MG in V2 and 12AT7 in the phase inverter.
I intended to tone down the gain level of my Fender HRD to lower the V1 gain level and move it to a later stage. proud to say mission accomplished. 5751 gets it done!
I use a 5751 in the v1 on a Fender Blues Deluxe ri. And this has made the clean channel warm and Clean.
I'm currently using one of these as V1 in a Peavey Classic 50 and it REALLY nails the Fender cleans and twang and quack, all while working well with my NOS 12AD7 in V2 for lead distortion.