Vacuum Tube - 5751, JJ Electronics

JJ Electronics
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Customer image: "JJ 5751 in a Jolida 3502S Integrated Amp"

Vacuum Tube - 5751, JJ Electronics

$19.95
In Stock

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
Product Measurements by Type
Body Height49.2 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 Diameter22 mm
Item Height56.3 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 Information
Packaging Dimensions0.9 in. × 0.9 in. × 2.3 in.
Weight (Packaging)0.05 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet475.34 KB

Questions and Answers

Click each question to see its answers.
Asked by mikeb4 on December 29th, 2015.
JustinG
December 30th, 2015
Staff Member
Top Contributor
Yes, the P-ST9-600 socket is compatible. Depending on your needs and specifications most 9-pin miniature sockets will work.
Asked by mikeb4 on December 29th, 2015.
JustinG
December 30th, 2015
Staff Member
Top Contributor
Depending on your needs and specifications most 9-pin miniature sockets will work.
Asked by Anonymous on May 12th, 2017.
Matt H
May 12th, 2017
If your amp calls for a 12AX7 the 5751 should work as it is a compatible tube.

Product Reviews

4.91 out of 5 based on 11 reviews
John Vaughan - March 9th, 2023
5 out of 5

This tubes woke up and also tamed my Blackstar HT40. Great purchase

Timscubparts - January 6th, 2023
5 out of 5

I saw the 12AX7 comparison here at Amplified Parts and noticed the positive description of this tube and its relatively low price so gave it a try. It has a very nice warm clean tone that breaks up nicely when pushed. This would be a good tube to try out a 5751 in your V.1.

Ken Masuda - December 13th, 2022
5 out of 5

Great tube and no problems with amplified parts!

Gunner Pete - August 19th, 2022
5 out of 5

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.

Brian with a Peavey - May 6th, 2022
5 out of 5

Added 2 to a 6505MH and they provide a much wider range of use on the gain.

Guster Buster - September 12th, 2021
5 out of 5

nice tube, immediately tamed my peavey valvekings harshness to cream

TSB - December 4th, 2020
5 out of 5

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.

Jefferson - August 2nd, 2020
4 out of 5

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.

Gerald Hooker - October 31st, 2019
5 out of 5

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!

drewski - July 25th, 2019
5 out of 5

I use a 5751 in the v1 on a Fender Blues Deluxe ri. And this has made the clean channel warm and Clean.