Vacuum Tube - KT66, JJ Electronics

JJ Electronics
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Vacuum Tube - KT66, JJ Electronics

Starting at: $39.95
Product Options
  • Apex Matched Pair
  • Apex Matched Quad
are currently out of stock and will be placed on backorder. This product has substitutes available! Check them out.

The JJ Electronic KT66 is a sonically faithful reproduction of the original tubes with a robust construction encased in a thick glass envelope. The JJ KT66 delivers a powerful 25 Watts with plenty of headroom. This tube has a tone that is warm, thick, and straightforward. With a more balanced sound than the 6L6GC, the JJ KT66 is an excellent choice for a full bodied tone.

Apex Tube Matching
Matched versions of this tube use Apex Matching
RoHS Compliant
SKU:
T-KT66-JJ
Item ID:
004871
Brand:
JJ Electronics, Apex Matched
Type:
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Apex Matched PairT-KT66-JJ-MP609722123136
Apex Matched QuadT-KT66-JJ-MQ609722123143
SingleT-KT66-JJ609722123129
Product Measurements
Body Height110 mm
Cathode current (Ik)150 mA max
Filament current (If)1.3 A
Filament voltage (Uf)6.3 V
Grid 1 voltage (Ug1)-15 V typical, -200 V min
Grid 2 current (Ig2)7 mA max
Grid 2 dissipation (Wg2)3.5 W
Grid 2 voltage (Ug2)250 V typical, 550 V max
Grid capacitance (cg1)16 pF
Grid to plate capacitance (cg1-a)2.3 pF
Internal resistance (Ri)22.5 kΩ
Item Diameter52 mm
Item Height125 mm
Plate (anode) capacitance (ca)10 pF
Plate (anode) current (Ia)85 mA
Plate (anode) dissipation (Wa)25 W max
Plate (anode) voltage (Ua)250 V typical, 550 V max
Transconductance (s)6 mA/V
Packaging Information
Packaging DimensionsSingle version2.3 in. × 2.3 in. × 5.3 in.
Apex Matched Pair version5.3 in. × 4.5 in. × 2.3 in.
Apex Matched Quad version5.3 in. × 4.5 in. × 4.5 in.
Weight (Packaging)Single version0.256 lbs.
Apex Matched Pair version0.512 lbs.
Apex Matched Quad version1.024 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet (569.46 KB)Specification Sheet

Questions and Answers

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Asked by Gorgut on January 6th, 2019. 1 person subscribed to this question
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BradWbr
January 9th, 2019
Staff Member
The example I measured had a diameter of 2.06" so the data sheet is accurate. I will have that information updated.
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