Vacuum Tube - 2A3, JJ Electronics

JJ Electronics
Vacuum Tube - 2A3, JJ Electronics image 1
Click to zoom in
Customer Images:
No Images yet! Submit a product image below!

Vacuum Tube - 2A3, JJ Electronics

Starting at: $129.95
In stock

The JJ Electronic 2A3 features a robust construction in a beautiful thick glass envelope. The JJ 2A3 offers 40 Watts of plate dissipation which far surpasses the headroom of other 2A3 tubes by 25 Watts. The single plate build and increased ratings give this tube the highest reliability. The JJ 2A3 has amazing detail and clarity with excellent separation.

RoHS Compliant
Item ID:
JJ Electronics
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Matched PairT-2A3-40-JJ-MP609722122733
Matched QuadT-2A3-40-JJ-MQ609722122740
Product Measurements
Body Height150 mm
Filament current (If)2.5 A
Filament voltage (Uf)2.5 V
Gain (μ)4.2
Grid capacitance (cg1)17 pF
Grid to plate capacitance (cg1-a)7.5 pF
Grid voltage (Ug)-45 V typical
Internal resistance (Ri)800 Ω
Item Diameter63 mm
Item Height165 mm
Plate (anode) capacitance (ca)11 pF
Plate (anode) current (Ia)60 mA
Plate (anode) dissipation (Wa)40 W max
Plate (anode) voltage (Ua)250 V typical, 450 V max
Transconductance (s)5.25 mA/V
Packaging Information
Packaging DimensionsSingle version3.5 in. × 3.8 in. × 7.3 in.
Matched Pair version7.4 in. × 6.9 in. × 3.5 in.
Matched Quad version7.4 in. × 6.9 in. × 6.9 in.
Weight (Packaging)Single version0.445 lbs.
Matched Pair version0.89 lbs.
Matched Quad version1.78 lbs.

My Project Lists

You must be logged in to add items to a project list.

Specifications, Files, and Documents

PDF: Specification Sheet (659.95 KB)Specification Sheet

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on March 18th, 2019. 1 person subscribed to this question
Please log in to receive notifications when this question is answered.
March 18th, 2019
Staff Member
If your amp calls for 2A3 tubes, these will work.
Have a question of your own? Ask us here!

Product Reviews

No product reviews yet! Be the first!
Don't see what you're looking for? Send us your product suggestions!