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Tube Specifications
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Listed below are the essential characteristics of popular tubes for amateur radio.

Eimac Taylor Tubes Svetlana Russia logo

POPULAR TRIODES
Type Number
Filament µ Maximum Ratings Typical Operation Max. Freq.
for Full Ratings
Volts Amps Plate Diss.
kW		 Pg. W Eb, kV Ib, A Eb, kV Ib, IA Po, kW Gain dB
8873
 6.3 3.0  240   0.2 5 2.2 0.4 2.0 0.3 0.3 15.3 500
3CX400A7 / 8874
 6.3 3.0 240 0.4 5 2.2 0.4 2.0 0.3 0.3 15.3 500
3CX800A7
 13.5 1.5 200 0.8 4 2.3 0.6 2.2 0.5 0.8 15.1 350
3CPX800A7
 13.5 1.5 200 0.8 4 3.5 0.6 3.2 0.4 0.9 15.9 500
3CX1200A7
 7.5 21.0 200 1.2 50 5.0 0.8 3.6 0.7 1.5 12.5 110
3CX1200D7 / YU-121
 6.3 25.0 200 1.2 50 5.5 0.8 4.0 0.6 1.6 14.8 110
3CX1200D7 / YU-181
 6.3 25.0 200 1.2 50 5.5 0.8 4.0 0.6 1.6 14.8 110
YC-236
 5.0 10.5 200 1.5 20 4.0 1.0 4.0 0.9 2.0 16.0 250
3CX1000A7 / 8283
 5.0 30.5 200 1 45 3.5 1.0 3.5 0.9 2.1 13.1 220
3CX1500A7 / 8877
 5.0 10.5 200 1.5 20 4.0 1.0 3.5 1.0 2.1 15.1 250
3CX5000A7
 10.0 17.5 200 5 35 6.5 2.5 6.0 1.6 5.0 14.2 110
3CX3000A / 8238
 7.5 51.5 5 4 50 6.0 2.5 5.5 1.1 5.1 14.5 110
3CX3000F1 / 8239
 7.5 51.5 5 4 50 6.0 2.5 5.5 1.1 5.1 14.5 75
3CX3000A7
 7.5 51.5 160 4 225 5.0 2.5 4.8 2.0 7.2 11.0 110
3CX3000F7
 7.5 50.5 160 4 225 5.0 2.5 4.8 2.0 7.2 - 75
3CX2500F3 / 8251
 7.5 51.5 20 4 150 6.0 2.5 6.0 2.1 10.0 18.7 75
3CX6000A7 / YU-148
 7.0 78.0 200 6 225 7.0 3.5 5.7 2.5 10.0 12.2 110
3CX10,000A3 / 8159
 7.5 99.0 20 10 250 7.0 5.0 7.0 4.0 22.4 15.3 160
3CX10,000A7 / 8160
 7.5 100.0 200 10 500 9.0 4.0 7.6 3.7 22.5 11.7 160
3CX15,000A7
 6.3 160.0 200 15 500 10.0 5.0 7.0 4.6 25.5 9.9 110
3CX20,000A7
 6.3 160.0 200 20 500 10.0 5.0 7.8 4.2 27.5 10.8 110
3-500Z
 5.0 14.6 130 0.5 20 4.0 0.4 3.0 0.4 0.74 14.0 110
3-1000Z
 7.5 20.0 200 1 50 6.0 0.7 6.0 0.7 3.2 13.2 110
811A
 6.3 4.0   60 watts 8 1.5 0.175 1.5 0.16 0.16 13.0 30
572B
 6.3 4.0 170 160 watts 50 2.7 0.275 2.4 0.25 0.30 7.5 30

TETRODES
Type Number
Filament Maximum Ratings Typical Operation Max. Freq.
for Full Ratings
Volts Amps Plate Diss.
kW		 Pg.1, W Pg.2, W Eb, kV Ib, A Eb, kV Ib, IA Po, kW Gain dB
8122
 13.5 1.3 0.4 – 8 2.2 0.3 2.0 0.3 0.4 – 500
8930
 6.0 2.6 0.4 2 12 2.4 0.3 2.0 0.3 0.4 21.0 500
4CX250B / 7203
 6.0 2.6 0.3 2 12 2.0 0.3 2.0 0.3 0.4 21.3 500
4CX250BC / 8957
 6.0 2.4 0.3 2 12 2.0 0.3 2.0 0.3 0.4 21.3 500
4CX250FG / 8621
 26.5 0.5 0.3 2 12 2.0 0.3 2.0 0.3 0.4 21.3 500
4CX250R / 7580W
 6.0 2.6 0.3 2 12 2.0 0.3 2.0 0.3 0.4 21.3 500
4CX300A / 8167
 6.0 2.9 0.3 2 12 2.0 0.3 2.0 0.3 0.4 21.3 500
4CX350A / 8321
 6.0 2.9 0.4 0 8 2.5 0.3 2.2 0.3 0.4 20.5 110
4CX350AC / 8321A
 6.0 2.9 0.4 0 8 2.5 0.3 2.2 0.3 0.4 20.5 110
4CX350F / 8322
 26.5 0.7 0.4 0 8 2.5 0.3 2.2 0.3 0.4 20.5 110
4CX350FJ / 8904
 26.5 0.7 0.4 0 8 2.5 0.3 2.2 0.3 0.4 20.5 110
4CX150A / 7034
 6.0 2.6 0.3 2 12 2.0 0.3 2.0 0.3 0.4 21.3 150
8560AS
 6.3 2.6 0.3 2 12 2.0 0.3 2.0 0.3 0.4 21.3 500
4CX300Y / 8561
 6.0 3.5 0.4 1 8 2.0 0.4 2.0 0.4 0.6 21.9 110
4CX400A
 6.3 3.2 0.4 2 8 2.5 0.4 2.5 0.27 0.4 – 500
4CX600JB
 6.0 5.4 0.6 1 15 3.0 0.6 2.8 0.6 1.0 20.0 30
4CX800A / GU-74B
 12.6 3.6 0.8 2 15 2.5 0.8 3.2 0.63 0.8   150
GU-84B / 4CX2500E
 27.0 3.7 2.5 1 30 2.2 2.0 2.0 1.25 1.5 – 75
4CX800A / GU74B
 12.6 3.6 0.8 – – 2.5 0.8 3.2 0.63 0.8 – 150
4CX1500B / 8660
 6.0 10.0 1.5 1 12 3.0 0.9 2.9 0.7 1.1 28.6 110
4CX1000A / 8168
 6.0 9.0 1.0 1 12 3.0 1.0 3.0 0.9 1.6 20.0 110
4CX1500A
 5.0 38.5 1.5 25 75 5.0 1.0 4.0 0.8 2.5 28.4 150
4CX1600B
 12.6 4.4 1.6 – – 3.3 1.4 2.4 0.87 2.1 – 250
4CX3000A / 8169
 9.0 41.5 3.5 50 175 7.0 2.0 6.0 1.5 7.1 23.1 150
4CX3500A
 5.0 90.0 3.5 50 165 5.5 2.0 5.0 1.3 5.3 23.2 220
4CX5000A / 8170
 7.5 75.0 5.0 75 250 7.5 3.0 7.0 2.2 12.5 20.7 110
4CX5000R / 8170W
 7.5 75.0 5.0 75 250 7.5 3.0 7.0 2.2 12.5 20.7 110
4CX7500A
 7.0 110.0 7.5 50 165 7.5 3.0 7.0 2.4 13.0 20.1 220
4CX10,000D / 8171
 7.5 75.0 10.0 75 250 7.5 3.0 7.5 2.8 16.0 20.3 110
4CX12,000A / 8989
 6.5 120.0 12.0 150 300 10.0 3.5 10.0 2.8 22.5 19.1 220
4CX15,000A / 8281
 6.3 160.0 15.0 200 450 10.0 6.0 10.0 4.6 36.5 22.2 110
4CX20,000A / 8990
 10.0 140.0 20.0 200 450 10.0 5.0 9.0 4.1 28.8 19.5 110
9010 / YC-130
 7.5 160.0 18.0 200 450 10.0 5.0 10.0 4.6 36.5 22.2 110
4-250A
 5.0 14.5 .25 10 35 4.0 0.35 3.0 0.31 1.0 – 110
4-400A
 5.0 14.7 .4 10 35 4.0 0.35 3.0 0.35 1.1 – 110
4-1000A
 7.5 21.3 1.0 25 75 6.0 0.7 6.0 0.7 3.4 – 110
Characteristics listed on this page are approximate, and for comparison only. The user should consult manufacturers data for detailed operating parameters to fit the application. RF Parts Company is not responsible for errors.

Price and availability subject to change without notice.

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