TH558, TH537, TH375
Other
Vertical
High Frequency
High Power
Power Triode
Metal Ceramic
23V
180A
4.0
550kw
Vertical
650mm
320mm
74kg
Water and Forced Air
SETEC
Foam Packing
China
8540890090
Product Description
It is a ceramic-metal tetrode of coaxial structure, employing Hypervapotron anode cooling, designed for use in AF and RF amplifiers up to 50MHz, this tube brings high efficiency to medium- and short-wave transmitters, moreover, this tube's pyrobloc grids result in highly stable operating characteristics, the anode cooling technique guarantees enhanced safety margins with respect to the operating point, it delivers up to 550kW power, with a high gain and efficiency.
Limit Working Conditions:
Typical Operation:

We manufacture the following all models.
FC-10FA, FC-10FT, FC-732F, FC-735F, FC-735FT, FC305F, FC311, FC312F, FC620F, FC620FT,
FD911S, FD003Z, FD-5S,
FC10FT, FC201F, FC307F, FC307FS, FC308C, FC310C, FC310F, FC502F, FC732F, FC734F, FC735F,
FU-33, FU-833A, 833A, 833C, FU-74F/RY-74B, FU-100F, FU-728F, FU-113F, FU-113FG, FU-998F, FU-5S, FU-62S, FU-610F, FU-610FA, FU-610S, FU-724F, FU-724S, FU-727F, FU-824F, FU-824FA, FU-834F, FU-834FA, FU-924F, FU-924FA, FU, FU-101F/M, FU-101Z, FU-101C, FU-832C/FA, FU-832F/M, FU-917F/M, FU-307S, FU-74F, FU-84F, FU-250F, FU-252F, FU-946F, FU611F, FU612F, FU613F, FU001F, FU104C, FU104Z, FU115F, FU116F, FU252F, FU615F, FU616C, FU617F, FU618F, FU720F, FU820C, FU820F, FU002F, FU617FT.
FM70FT,
ML8533, ML8536
YU191B, YU191C, YU-148, YU-108(3CX4500H3), YU-148(3CX6000A7), YU-191B,
YL1050, YL1057, YL1631, YL1420,
CQK25-2, CQK50-2
3CX2500H3, 3CX2500A3/F3, 3CX3000A7, 3CX3000F7, 3CX1500D3, 3CX10000D3, 3CX10000A3/A7, 3CX10000H3, 3CX15000A3/A7, 3CX15000H3, 3CX20000H3, 3CX20000A7,
3C(P)X800A7, 3C(P)X1500A7, 3CPX5000A7,
3CW5000F1/F3, 3CW40000H3, 3CW45000H3, 3CW20000A7, 3CW20000H3, 3CW20000H7, 3CW30000H3/A7, 3CW30000H7, 3CX2500A3, 3CX2500F3, 3CX2500H3, 3CX3000A7, 3CX1500A7, 3CW20000A7,
4CX250B, 4CX250R, 4CX250FG, 4CX800A/RY-74B, 4CX800A, 4CX350A, 4CX350F, 4CX1000A, 4CX1500B, 4CX3500A, 4CW1000A, 4CX1500A, 4CX3000A, 4CX5000A, 4CX5000R, 4CX7500A, 4CX10000D/J, 4CX15000A, 4CX20000C/D/E, 4CV100000C, 4CX250K, 4CX1500A, 4CX3000A, 4CX15000A, 4CV100000C, 4CX35000C, 4CX5000A
5CX1500A,
CTK12-4, CTK12-1, CTK15-2, CTK-25-4, ITK12-1, ITK3-1, ITK5-1, ITK15-2, ITK30-2, ITK60-2, ITL12-1, ITL3-1, ITL5-1, ITL9-1, ITL15-2, TH5-6, TH6-3A, TH382, TH382, TH584, TH338, TH331, TH537, TH527, TH327, TH582, TH558, TH610, TH375, TH576, TH373, TH328, TH347, TH375, TH537, TH558, TH373.
E3061, E3062, E3062E, E3069, E3130,
RS3060CL, RS3060CJ, RS3021CJ, RS3026CJ, RS3040CJ, RS3041CJ, RS3041CJ/CLX, RS3040CJ/CLX, RS3060CJ/CLX, RS3021, RS2048CJ, RS2048CJC, RS1034SK, RS1034SL, RS1072C, RS2054SK,
8560AS, 928F/836F, 8741, 7T85, 7T69, 8F75R, 7F71RA, 8F68R
6T51, 6T58RA, 7T62R, 7T62RE, 7T85RB, FU-947F, 7T69RB, 7T84RB, 7T69RB, 8T25RA, 8T85RB, 8T87RB, 8F76R, 8T69JB,
SK300 Socket, SK1300 Socket, SK2210 Socket, SK184 Socket.
Filament supply | 23V / 500A |
Amplification factor | 3.7 to 4.9 |
Transconductance (la = 10/15A, VG2= 1000V) | 180mA /V min. |
Height | 650mm |
Diameter | 320mm |
Weight | 74kg |
Cooling | |
Anode, demineralized water | 110l/mn min. |
Tube base, air through dedicated socket | 1.6m3/mn min. |
Anode voltage | 15kV |
Control-grid voltage | 1 000V |
Screen voltage | 1.25kV |
Peak cathode current | 600A |
Control-grid dissipation | 3kW |
Screen-grid dissipation | 8kW |
Output power (from PA) | 550kW |
Anode efficiency at 500kW | 83.5% |
Frequency | 26MHz |
Heater voltage | 20.5V |
Anode voltage | 12.5kV |
Screen-grid dc voltage | 1 100V |
Control-grid dc voltage | - 500V |
Anode dc current | 54A |

TH558 is a High Frequency Metal ceramic transmitting tube designed specifically for industrial applications. This tube uses a coaxial design and metal-ceramic technology. This tube may be operated in CW or pulse modes.
For operation in pulse mode, the parameters depend on each equipment characteristics.We manufacture the following all models.
FC-10FA, FC-10FT, FC-732F, FC-735F, FC-735FT, FC305F, FC311, FC312F, FC620F, FC620FT,
FD911S, FD003Z, FD-5S,
FC10FT, FC201F, FC307F, FC307FS, FC308C, FC310C, FC310F, FC502F, FC732F, FC734F, FC735F,
FU-33, FU-833A, 833A, 833C, FU-74F/RY-74B, FU-100F, FU-728F, FU-113F, FU-113FG, FU-998F, FU-5S, FU-62S, FU-610F, FU-610FA, FU-610S, FU-724F, FU-724S, FU-727F, FU-824F, FU-824FA, FU-834F, FU-834FA, FU-924F, FU-924FA, FU, FU-101F/M, FU-101Z, FU-101C, FU-832C/FA, FU-832F/M, FU-917F/M, FU-307S, FU-74F, FU-84F, FU-250F, FU-252F, FU-946F, FU611F, FU612F, FU613F, FU001F, FU104C, FU104Z, FU115F, FU116F, FU252F, FU615F, FU616C, FU617F, FU618F, FU720F, FU820C, FU820F, FU002F, FU617FT.
FM70FT,
ML8533, ML8536
YU191B, YU191C, YU-148, YU-108(3CX4500H3), YU-148(3CX6000A7), YU-191B,
YL1050, YL1057, YL1631, YL1420,
CQK25-2, CQK50-2
3CX2500H3, 3CX2500A3/F3, 3CX3000A7, 3CX3000F7, 3CX1500D3, 3CX10000D3, 3CX10000A3/A7, 3CX10000H3, 3CX15000A3/A7, 3CX15000H3, 3CX20000H3, 3CX20000A7,
3C(P)X800A7, 3C(P)X1500A7, 3CPX5000A7,
3CW5000F1/F3, 3CW40000H3, 3CW45000H3, 3CW20000A7, 3CW20000H3, 3CW20000H7, 3CW30000H3/A7, 3CW30000H7, 3CX2500A3, 3CX2500F3, 3CX2500H3, 3CX3000A7, 3CX1500A7, 3CW20000A7,
4CX250B, 4CX250R, 4CX250FG, 4CX800A/RY-74B, 4CX800A, 4CX350A, 4CX350F, 4CX1000A, 4CX1500B, 4CX3500A, 4CW1000A, 4CX1500A, 4CX3000A, 4CX5000A, 4CX5000R, 4CX7500A, 4CX10000D/J, 4CX15000A, 4CX20000C/D/E, 4CV100000C, 4CX250K, 4CX1500A, 4CX3000A, 4CX15000A, 4CV100000C, 4CX35000C, 4CX5000A
5CX1500A,
CTK12-4, CTK12-1, CTK15-2, CTK-25-4, ITK12-1, ITK3-1, ITK5-1, ITK15-2, ITK30-2, ITK60-2, ITL12-1, ITL3-1, ITL5-1, ITL9-1, ITL15-2, TH5-6, TH6-3A, TH382, TH382, TH584, TH338, TH331, TH537, TH527, TH327, TH582, TH558, TH610, TH375, TH576, TH373, TH328, TH347, TH375, TH537, TH558, TH373.
E3061, E3062, E3062E, E3069, E3130,
RS3060CL, RS3060CJ, RS3021CJ, RS3026CJ, RS3040CJ, RS3041CJ, RS3041CJ/CLX, RS3040CJ/CLX, RS3060CJ/CLX, RS3021, RS2048CJ, RS2048CJC, RS1034SK, RS1034SL, RS1072C, RS2054SK,
8560AS, 928F/836F, 8741, 7T85, 7T69, 8F75R, 7F71RA, 8F68R
6T51, 6T58RA, 7T62R, 7T62RE, 7T85RB, FU-947F, 7T69RB, 7T84RB, 7T69RB, 8T25RA, 8T85RB, 8T87RB, 8F76R, 8T69JB,
SK300 Socket, SK1300 Socket, SK2210 Socket, SK184 Socket.