Vacuum Tube - 5751, JJ Electronics

Vacuum Tube - 5751, JJ Electronics

JJ Electronics
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$13.95
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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 Anonymous on May 12th, 2017.
Matt H.
May 12th, 2017
Staff Member
If your amp calls for a 12AX7 the 5751 should work as it is a compatible tube.
Asked by Anonymous on May 12th, 2017.
Matt H.
May 12th, 2017
Staff Member
Yes, the P-ST9-600 socket is compatible. 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
Staff Member
Depending on your needs and specifications most 9-pin miniature sockets will work.
Asked by Anonymous on June 19th, 2020.
BradWbr
June 22nd, 2020
Staff Member
This tube would certainly be a reasonable compromise between a 12AY7 and a 12AX7, but we are unable to guarantee your desired results. If the amp is based on a Champ or is similar in the sense that it is single ended, biasing should never be required for your amp.

Product Reviews

4.75 out of 5 based on 4 reviews
- April 16th, 2020
5 out of 5

5751 by JJ I like these in V1. I did this with two amplifiers. (sent one of them in the pic.) one was a marshall clone and the other was a fendery design from a friend. a little less power, but all the tone. nice for cleaner headroom. and I think a bit more control on the dirt, too. good stuff!

- July 12th, 2019
5 out of 5

Great tube ! Fast Shipping !

- August 7th, 2015
5 out of 5

I was looking to change the gain and tone of my old Marshall XLS's. The tubes worked as desired. The shipping and price were also reasonable. I will be a return customer.

- February 23rd, 2015
4 out of 5

I am using this JJ 5751, in the V2 position in my Carvin X100b from around 1994. I believe this is the second gain stage. In the V1 position, I have the Tungsoll 12ax7. Since I installed the tubes at the same time, my review will be somewhat biased (pun intended), with that being said, my overall impression is that the amp has a more balanced sound across the frequencies, with a nice bit of texture and punch, smoothly added in. The tubes I had before were a GE 12ax7 from around the mid 60's and a EH 12ax7. Whether I'm using the clean channel, or the overdrive channel- including the boost, the overall improvement, while not awe inspiring, is noticeable and makes for a stronger, smoother, and more enjoyable playing experience. The noise level did not increase, and that is noteworthy because the GE tube was very quiet, compared to others I have tried. I would think that it would be hard to go wrong with this combination.

Substitute Products

The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.