Tetrodes

Note:
Manufacturer Model Anode dissipation Cooling Fmax Notes
Russian GU-13 100W ??? 30MHz  
Eimac 4-125A 4D21 125W Radiation and forced air 120MHz 4-125
Eimac 4PR125A 8247 125W Radiation and forced air - -
RCA 4-125A 4D21 125W Radiation and forced air 120MHz 4-125
Eimac 8560A see notes Conduction 500MHz 8560. The plate dissipation is limited by the heatsink.
Svetlana 8560AS 200W Conduction 500MHz 8560
EEV C1112 250W Radiation and forced air 110MHz  
Eimac 4-250A 5D22 250W Radiation and forced air 110MHz 4-250
RCA 4-250A 5D22 250W Radiation and forced air 110MHz 4-250
GEC CCS1 250W Conduction 500MHz CCS1. Similar to the 4CX250B, but conduction, rather than air cooled.
Eimac 4CPX250K 8590 250W Forced air 500MHz 4CPX250K Pulsed tube. Can deliver in excess if 10kW with 10dB gain at 450MHz.
Eimac 4CS250R 250W Conduction 500MHz 4CS250. Similar to 4CX250R
Eimac 4CX250B / 7203 250W Forced air 500MHz 4CX250. The 4CX250B is very popular. 6.0 V heater
STC 4CX250B / CV6136 250W Forced air 500MHz 4CX250.
Penta 4CX250B/M 250W Forced air 500MHz 4CX250. An odd make. 4CX250B/M is a new one to me.
Eimac 4CX250BC / 8957 250W Forced air 500MHz 4CX250. The 4CX250BC is a premium quality 4CX250B, but needs a closer heater voltage
Eimac 4CX250FG / 8621 250W Forced air 500MHz 4CX250. Identical to 4CX250B, except this has a 26.5 V heater.
Eimac 4CX250K / 8245 250W Forced air 500MHz 4CX250. Coaxial mount.
Eimac 4CX250M / 8246 250W Forced air 500MHz 4CX250. Coaxial mount.
Tesla 4CX250M / RE 025 XM 250W Forced air 1000MHz 4CX250M 4CX250M Coaxial mount
Eimac 4CX250R / 7580W 250W Forced air 500MHz See also the data sheet for the 8930 says it is electrically identical except for the larger cooler on the 8930, allowing greater dissipation. The 4CX250R is physically identical to the 4CX250B
Eimac 4X150A (1960 issue)
4X150A (1970 issue)
250W Forced air 150MHz (500MHz at reduced ratings) 4X150. Identical to 4X150D except for heater voltage is 6.0V on this tube.
Eimac 4X150D (1960 issue)
4X150D (1970 issue)
250W Forced air 150MHz (500MHz at reduced ratings) 4X150. Identical to 4X150A except for heater voltage is 26.5V on this tube. Data sheet same as 4X150A.
STC 4X250 / CV2487 250W Forced air 175MHz 4X250. Although electrically equivalent to the 4CX250B, the base seals must be kept below 175 deg C, whereas on the 4CX250B they are okay to 250 deg C.
Eimac 4CW300B 250W Water 400MHz 4CW300B 4CW300
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Amperex 7580W 250W Forced air 500MHz 7580. Same as 4CX250R i.e. a ruggidised tube.
Philips QB 3.5/750 250W Radiation and air 75MHz
Eimac 4W300B 8249 300W Water 500MHz Electrically identical to 4CX250B. Reserve anode dissipation
Eimac 4CX300A 8167 300W Forced air 150MHz 4CX300. A poor quality copy of the data sheet.
Raytheon 4CX300A CK8167 300W Forced air 500MHz 4CX300.
Eimac 4CX350A / 8321 350W Forced air 110MHz 4CX350. Good linearity. Identical to 4CX350F except for heater voltage.
Eimac 4CX350F / 8322 350W Forced air 110MHz 4CX350. Good linearity. Identical to 4CX350A except for heater voltage.
Eimac 4CX350FJ / 8904 350W Forced air 110MHz 4CX350. IMD performance better than 4CX350F. 26.5V heater.
Eimac 8930 350W Forced air 500MHz Electrically idential to the 4CX250R / 7598W, but the larger anode ratiator allows higher dissipation with low air flow and pressure drop.
Eimac 4CX300Y / 8561 400W Forced air 150MHz  
Eimac 4-400A 400W Radiation
+Forced air
110MHz 4-400. Glass envelope, poor copy, but looks complete.
RCA 4-400A 400W Radiation
+Forced air
110MHz 4-400. Glass envelope. This might not be a full data sheet, as it's only 2 pages. See also the Eimac 4-400A
Philips QB 4/1100 400W Radiation
+Forced air
110MHz Glass envelope
unknown Q450-1 450W Conduction 120MHz
Eimac 4-500A 500W Radiation
+Forced air
110MHz 4-500. Glass envelope.
Mullard QY4-500A 500W Forced air 220MHz
Eimac 4CX600B 600W Forced air 500MHz 4CX600. The same as the 4CX600F, except 6.0V heater.
Eimac 4CX600F 600W Forced air 500MHz 4CX600. The same as the 4CX600B, except 26.5V heater.
Eimac 4CX600J / 8809 600W Forced air 110MHz 4CX600. Highly linear. The Y584 is a specialised version of this tube
Eimac 4CX600JA / 8921 600W Forced air 110MHz 4CX600. Highly linear.
Eimac 4CX600JB 600W Forced air 110MHz 4CX600JB 4CX600.
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Eimac 4CW800B 800W Water 500MHz 4CW800.
Eimac 4CW800F 800W Water 500MHz 4CW800.
Svetlana 4CX800A 800W Forced air 150MHz 4CX800.
Amperex 4-1000A / 8166 1000W Radiation
+Forced air
110MHz 4-1000. Glass envelope. See also Eimac 4-1000A
Amperex 4PR1000A 1000W Radiation
+Forced air
110MHz 4PR-1000. Glass envelope, designed for pulsed use.
Eimac 4-1000A 1000W Radiation
+Forced air
110MHz 4-1000. Glass envelope. See also Amperex 4-1000A
Eimac 4CPL1000B 1000W immersion in liquid --- Pulse modulator, voltage regulator or switch
Eimac 4CPL1000C 1000W immersion in liquid --- Pulse modulator or switch
Eimac 4CPL1000A 1000W immersion in liquid --- Pulse modulator or switch
Eimac 4CX1000A 8168 1000W Forced air 110MHz 4CX1000. Some (including me) believe this is a troublesome tube.
Eimac 4CX1000K / 8352 1000W Forced air 400MHz 4CX1000. 4CX1,000K
Eimac Y-477 1000W Conduction unknown The anode dissipation is believed to be 1000 W, not 1500 W as stated. Check with Eimac.
Eimac 4CX1500A 1500W Forced air 150MHz 4CX1500. There is also a Penta data sheet for this tube.
Penta 4CX1500A 1500W Forced air 150MHz 4CX1500A 4CX1500.
Eimac 4CX1500B / 8660 1500W Forced air 110MHz 4CX1500.
Eimac 4CX1500BC 1500W Forced air 450MHz 4CX1500BC 4CX1500.
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
RCA 7213 1500W Forced air 1315MHz  
Russian 7213 1500W Forced air 1315MHz  
Mullard QY3-1000A 1500W Forced air 800MHz  
Eimac 4CW2000A 2000W Water 110 MHz  
Philips QBL 5/3500 3000W Forced air 220MHz
Eimac 4CX3000A / 8169 3500W Forced air 150MHz 4CX3000
Russian GU-73B 3500W Forced air 250MHz  
EEV 4CX5000A 5000W Forced air 30MHz See also the Eimac 4CX5000A / 8170 below
Eimac 4X5000A 5000W Forced air 30MHz 4X5000. Very old data sheet. Note its a 4X, and not a 4CX and has a frequency of maximum ratings of only 30MHz. See also the 4CX5000A / 8170 below
Eimac 4CX5000A / 8170 5000W Forced air 110MHz 4CX5000. Electrically identical to the Eimac 4CX10000D (8171), except for the later tubes increased anode dissipation.
Eimac 4CX5000J / 8909 5000W Forced air 100MHz
Eimac 4CX5000R / 8170W 5000W Forced air 100MHz 4CX5000.
Eimac 4CX7500A 7500W Forced air 220MHz 4CX7500A 4CX7500.
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Penta 4CX7500A 7500W Forced air 220MHz
Sorry, no Eimac data sheet - only this Penta one.
Eimac 4CV8000A 8000W Vapor & forced air 150MHz This is a vapor cooled tube, which is quite rare at this size.
Svetlana 4CW10,000A 8661 10,000W Water+forced air 30MHz Rated 10 kW, but the Eimac version is rated 12 kW. That's not a very good rip-off by Svetlana!
Eimac 4CX10,000D 8171 10,000W Forced air 110MHz 4CX10,000D 4CX10000. 4CX10000D Electrically identical to the 4CX5000A
Eimac 4CW10,000A 8171 12,000W Water + forced air 110MHz Svetlana model rated 10kW. Eimac 12 kW (not a very good rip-off by Svetlana!)
Eimac 4CW10,000B 12,000W Water + forced air 110MHz 4CW10,000B 4CW10000B 4CW10000 4CW10,000
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Eimac 4CX10,000J 12,000W Forced air 100MHz 4CX10000 4CX10000J
Eimac 4CX12000A / 8989 12,000W Forced air 220MHz 4CX12000 4CX12,000. 4CX12,000A There is also a Svetlana 4CX12000A data sheet though.
Svetlana 4CX12,000A 8989 12,000W Forced air 220MHz 4CX12000 4CX12000A
Eimac 4CX15,000A / 8281 15,000W Forced air 110MHz 4CX15000 4CX15,000
Eimac 4CX15,000J 4CX15000J 8910 15,000W Forced air 110MHz 4CX15000 4CX15,000
Eimac 4CX15,000R 15,000W Forced air 110MHz 4CX15000 4CX15,000. See also Svetlana 4CX15000Rdata sheet.
Svetlana 4CX15,000R 15,000W Forced air 110MHz 4CX15000R 4CX15,000R.
Eimac Y-863 15,000W Forced air 220MHz Y-863
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Eimac 8989 15,000W Forced air 220MHz Formally X-2219
Eimac 4CX20,000A / 8990 20,000W Forced air 110MHz 4CX20000 4CX20000A See also older 8990 data sheet
Svetlana 4CX20,000A / 8990 20,000W Forced air 110MHz 4CX20000 4CX20,000A
Eimac 4CX20,000B 20,000W Forced air 30MHz 4CX20,000B 4CX20000B 4CX20,000.
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Svetlana 4CX20,000B 20,000W Forced air 30MHz 4CX20000B 4CX20000 4CX,20000
Eimac 4CX20,000C 20,000W Forced air 110MHz 4CX20,000C 4CX20000C 4CX20,000.
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Svetlana 4CX20,000C 20,000W Forced air 110MHz 4CX20000 4CX20,000.
Eimac 4CX20,000D / 9015 20,000W Forced air 110MHz 4CX20,000D 4CX20000 4CX20000D.
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Eimac 4CX20,000E 20,000W Forced air 110MHz 4CX20,000E 4CX20000E 4CX20,000.
Eimac 8990 20,000W Forced air 220MHz Formally X-2213
Eimac 4CX25,000A 25,000W Forced air 230MHz 4CX25000 4CX25000A
Eimac 4CX25,000C 25,000W Forced air 110MHz 4CX25000 4CX25000C
EEV 4CW25000A 25,000W Water 110MHz full, 225MHz reduced Does anyone have an Eimac data sheet for the 4CW25000A?
Eimac 4CW25,000A 25,000W Water 110MHz 4CW25,000A 4CW25000A 4CW25000.
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Eimac 4CW25,000B 25,000W Water 110MHz 4CW25,000B 4CW25000B 4CW25000.
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Eimac 4CW30,000A 30,000W Water 110MHz (220MHz reduced) 4CW30000 4CW30000A
Eimac 4CX30,000G 30,000W Forced air 110MHz (CW) 230MHz (TV) 3CX30000 4CX30000G
Eimac 4CV35,000A 35,000W Vapor 110MHz .
Eimac 4CX35,000C 8349 35,000W Forced air 30MHz
Eimac 4CX40,000GM 40,000W Forced air 250MHz 4CX40,000GM 4CX40000GM 4CX40000.
No FULL Eimac data sheet - can you supply one? If so please upload the file(s)
Eimac 4CV50,000E 50,000W Vapor 110MHz 4CV50000E 4CV50000
Eimac 4CV50,000J 50,000W Vapor 110MHz 4CV50,000J 4CV50000J 4CV50,000
Eimac 4CW50000E 50,000W Water 110MHz 4CW50,000E 4CW50,000E 4CW50000
Eimac 4CW50,000J 50,000W Water 110MHz 4CW50000 4CW50000J
Eimac 4CW100,000E 100,000W Water 108MHz 4CW100000E Needs SK-2100 water jacket.
Eimac 4CW150,000E 150,000W Water 108MHz 4CW150000E 4CW150000
Eimac 4CV250,000B 250,000W Vapor 50MHz Great for QRP 4CV250000B
Eimac 4CW250,000B 250,000W Water 50MHz Great for QRP 4CW250000B
Eimac 4CM300,000GA 300,000W Multiphase
Water+vapor
50MHz
(110MHz reduced)
Eimac 4CPW1000KA / 9009 / X-2026K 1MW Water --- No good for QRP as this is a switch tube.
Eimac 8973 / X-2170K 1MW Water 110MHz The ultimate tube for QRP

The site does not have every data sheet. Some are missing. If you have any of wanted list please let me know. You can upload them directly to my web server (this is on another domain, but don't worry about that). For security reasons, to stop hackers and spammers, the files will be unreadable until I have checked them fully.



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