EUROPEAN TUBES (preamp, power, tuning eyes) (SCROLL DOWN PAGE TO CHECK STOCK)


4654=EL50 early 1950's (transco base) (transco base = side contacts) TO BUY 4654
TO BUY EL50

4654K 1950's (octal base) (4654K has octal base with top cap connection for plate) (also see EL39) TO BUY 4654K
TO BUY EL39
(the EL39 succeeded the 4654K)
4683=AD1 Triode 1950's (transco base) (4683=AD1 with higher specs) (Vplate=350V max, Iplate=70ma max, Pwatts=20 max) (AD1: Vplate=250V max, Iplate=60ma max, Pwatts=15 max) TO BUY AD1

4688=AL5 Pentode (no top cap) (4688: Vfil=4V @ 2A) Class AB TO BUY 4688=AL5

4689=EL5 Pentode (no top cap) (4689: Vfil=6.3V @ 1.3A) Class AB TO BUY 4689=EL5
TO BUY EL5

4694=EL33 Pentode (9 watts, 13 watts PP Class AB, Vplate max = 400V) TO BUY 4694

4699=EL6 Pentode (4699: Vfil=6.3V @ 1.3A, Vplate max=425V, Vscreen max=425V, Pout max=18 watts, Pout Class AB Push-Pull can achieve 29 watts) (Vplate typical for Class A Operation = 375 volts) TO BUY 4699

TO BUY AC50
TO BUY AC701 and AC701K Telefunken Triode
TO BUY AD1 (also see 4683)
TO BUY AF3
TO BUY AF7
TO BUY AK2
TO BUY AZ Series Rectifiers

C3G / C3M Philips / Siemens / Telefunken (Pentode) (10,000 hour Special Quality petode designed for AF and RF circuits) (Good driver tube for 300B amplifier, see Glass Audio Issue 1/98, page 18) - Ypsilon PST-100 MK2 Preamplifier (Greece) (2014) - Shindo Vosne-Rominee 2006 preamp - Yamamoto A-06-3 amp 2010 C3M Tested on SOFIA curve tracer: (Vfilament=20V @ 125ma, Vplate=225V, Vscreen=155V, Vgrid=-3V, Iplate=20-30ma) C3G Tested on SOFIA curve tracer: (Vfilament=6.3 @ 370ma, Vplate=225V, Vscreen=155V, Vgrid=-3V, Iplate=20-30ma) TO BUY C3M
TO BUY C3G
TO BUY C3M
TO BUY CL33
TO BUY 12E1=CV345
TO BUY A1714=CV345
TO BUY CV819
TO BUY CY-1 rectifier
TO BUY DA41
TO BUY DAF96=1AF5
TO BUY DF96=1AF4
TO BUY DF97=1AN5
TO BUY DK96=1AB6
TO BUY DL94=3V4
TO BUY DR2000
TO BUY DY80
TO BUY DY86
TO BUY DY87
TO BUY E55L=8233 Power Pentode (Magnoval Base)
TO BUY 6085=E80CC Dual Triode
TO BUY E80L=6227
TO BUY E80T=6218 Amperex
TO BUY E81L=6686
TO BUY E83F (V76 Telefunken mic preamp)
TO BUY EC86 Telefunken
TO BUY E86C
TO BUY E88C Triode
TO BUY E88CC=6922 Dual Triode
TO BUY CCa=6922 Dual Triode
Click here to see CCa Siemens 1968 and 1974 TO BUY E90CC=5920 Dual Triode
TO BUY E91AA
TO BUY E130L=7534 Power Pentode
TO BUY E180CC=7062 Dual Triode
TO BUY E280F=7722

E283CC Dual Triode - Studer J37 (DIFFERENT PINOUT than a 12AX7, but is electrically equivalent to a 12AX7) (6.3V parallel filaments) (Frame Grids like ECC803S Telefunken, 10,000+ hr Special Quality 12AX7) TO BUY E283CC
Click here to see E283CC Siemens Germany
TO BUY E1R (similar to ECH4)
TO BUY EA50=CV1092
TO BUY EA53
TO BUY EA76
TO BUY EAA91
TO BUY EABC80=6AK8
TO BUY EAC91=CV137
TO BUY EAF42=6CT7
TO BUY EAF801
TO BUY EAM86=6GX8
TO BUY EB4
TO BUY EB41
TO BUY EB91=6AL5
TO BUY EBC3
TO BUY EBC11
TO BUY EBC33
TO BUY EBC41
TO BUY EBC81=6BD7A
TO BUY EBC91=6AV6
TO BUY EBF2
TO BUY EBF11
TO BUY EBF80=6N8
TO BUY EBF83
TO BUY EBF89=6DC8
TO BUY EBL1
TO BUY EC55
EC86 Telefunken (triode) EC86 Telefunken <> bottom NOS Kuhl-Tube cryo-treated gold pins original boxes 1960's TO BUY EC86 and EC806S Telefunken
EC88=E88C Triode (Marantz 10B) TO BUY EC88 or E88C
TO BUY EC81
TO BUY EC92=6AB4

EC806S Telefunken <> Gold Pins Triode (Kuhl-Tube cryo-treated) (special quality low noise, long-life EC86) TO BUY EC806S Telefunken

listed below EC806S=E86C TELEFUNKEN <> BOTTOM GOLD PINS Kuhl-tube cryo-treated, tubes were factory sealed before testing and matching:
EC900=6HM5=6HA5 EC900 Valvo HOlland NOS see 6HM5 listing
ECC31 / ECC32 / ECC33 ECC31 (see 6N7GT) [ ECC32 MULLARD ] [ ECC33 MULLARD ]
ECC34 Mullard Black Base 1950's typical operation: (Vplate = 250V, Vgrid = -16V, Iplate = 10ma, Gm = 2200, Rplate = 5.2K, Mu = 11.5) (ECC32 Mu = 32, ECC34 Mu = 11.5) (ECC34 has similar specs to a ECC32 and same filament current: ECC32 filament current = 950ma, 6SN7GTB filament current = 600ma, ECC34 filament current = 950ma) (very rare tube with superb sound and recommended as the input tube in the BAT VK60 amplifier) ECC34 Mullard NOS 1950's listed below TO BUY ECC34

ECC35=6SL7GT Mullard TO BUY ECC35=6SL7GT

ECC40 - Lampizator DAC
TO BUY ECC40

ECC84=6CW7 / ECC99 JJ ECC84 (see 6CW7 listing) ECC99 JJ (the best sub is a 12BH7A RCA, Sylvania or GE)
ECC81 = 12AT7 DUAL TRIODE TO BUY 12AT7

ECC82 = 12AU7 DUAL TRIODE TO BUY 12AU7

ECC83 = 12AX7 DUAL TRIODE TO BUY 12AX7

ECC189=6ES8 / ECC801S=12AT7 / ECC802S=12AU7 / ECC803S=12AX7 TO BUY ECC189=6ES8
TO BUY ECC801S
TO BUY ECC802S
TO BUY ECC803S

ECC804 / ECC2000 ECC804 (similar to 6FQ7/6CG7) Vplate=200V, Vgrid=-8, Iplate=10ma, Gm=3400, Mu=18, Vfil=6.3V @ 300ma ECC2000 Amperex Holland NOS gold pins (10 pin dual triode) (2) branded as Philips Special Quality $50 (1) branded as Valvo $50
ECF80=6BL8 (Triode/Pentode) [ ECF80=6BL8 TELEFUNKEN ]
ECF82=6U8 (Triode/Pentode) ECF82=6U8 Telefunken NOS in stock listed under "6U8" section
ECF83 (Triode/Pentode) - Blaupunkt radio TO BUY ECF83

ECH3 / ECH4 / ECH11 / ECH35 TO BUY ECH3
TO BUY ECH11
TO BUY ECH35

ECH42=6CU7 / ECH81=6AJ8 / ECH83=6DS8 PYE P75 Telefunken ID54U/S car radio TO BUY ECH42
TO BUY ECH81 Telefunken
10) ECH81=6AJ8 Telefunken Diamond Bottom <> Germany NOS 1960's $20 (recommended) GRUNDIG 3089PH 1957, Telefunken Jubilee, SABA 7) ECH81 Siemens India NOS 1975 $10 2) ECH81 Philips Holland NOS 1962 $15 3) ECH81 Philips Spain NOS 1966 $12 1) ECH81 Valvo Holland NOS 1960's $12 1) ECH81 Mullard NOS 1964 $15 1) ECH81 Sonotone Siemens NOS 1959 $15 1) ECH81 Valvo Germany like new 1959 $10 1) ECH81 Valvo Germany like new 1960 $10 1) ECh81 Super Radiotron Australia NOS $10 1) ECH81 Mullard used/good 1959 $10 1) ECH81 Ultron NOS $10 1) ECH83=6DS8 Amperex Bugle Boy Italy NOS $8 (Triode/Heptode) 2) ECH83 Philips Holland NOS $8
ECL11 / ECL80=6AB8 / ECL82=6BM8 / ECL83 / ECL85=6GV8 0) ECL11 TO BUY ECL80
1) ECL80 Mullard used/good $6 10 ECL80 Matshushita JAPAN used/good $5 ECL82=6BM8 go to [ ECL86=6BM8 Philips Holland - Mullard - Telefunken ] 2) ECL83 HOGES Germany NOS appear to be made by Mullard $15 8 pairs @ $14/pair) ECL84=6DX8 GE JAPAN or RCA JAPAN NOS ECL85=6GV8 many in stock (see 6GV8 listing)
EDD11 1) EDD11 Telefunken used $50
EF5 / EF6 / EF9 / EF11 TO BUY EF5
TO BUY EF6
TO BUY EF9
TO BUY EF11

EF12 Pentode (Vplate=250V, Vscreen=100V, Iplate=3.7ma, Gm=2.6ma/V) TO BUY EF12

EF13 TO BUY EF13

EF14 Telefunken (Pentode) (Vplate=250V, Vscreen=200V, Vgrid=-4.5V, Iplate=12ma, Iplate2=1.7ma, Mu=28, Gm=7000, Rp=200Kohms) - Pearlman TM1 TO BUY EF14 Telefunken listed below
1 tube $199) EF14 Telefunken NOS tube was "FACTORY SEALED" inside original box, seal was cut to test tube (ig date code = March 1957) (17.2ma, Gm=9250) Production Code #167 1 tube $199) EF14 Telefunken NOS tube was "FACTORY SEALED" inside original box, seal was cut to test tube (ki date code = April 1957) (17.4ma, Gm=9200) Production Code #085, spots on tube are from ceiling lights, not on tube 1 tube $199) EF14 Telefunken NOS original box - tube in excellent condition - (bt date code = November, 1952) (18.2ma, Gm=9900) 1 tube $189) EF14 Telefunken like new in EF14 Tele box 1950's, brass pins, strong output (20.8ma, Gm=10,300)
EF15 / EF22 0) EF15 TO BUY EF22

EF37A Pentode 1) EF37A Philips Miniwatt Holland by Mullard UK NOS 1962 red paint $15
EF40 Pentode EF40 European NOS $8.50 ea 3) Miniwatt Holland 1957-1959 3) Philips France 1960-1966 1) Miniwatt France 1959 2) Mullard France 1961 2) Miniwatt France 1962 and 1964
EF41 Pentode / EF42 4) EF41 VALVO France NOS in VALVO boxes 1960's $20 10) EF42 Amperex Holland NOS $25
EF80 Pentode - Pearlman TM-1 microphone - Darkvoice TO BUY EF80=6BX6
EF80 Valvo made in Holland NOS 1969
EF81 Pentode 0) EF81 Valvo Holland NOS 1960 original box 0) EF81 Philips East German or Hungary NOS original box
EF83 Pentode 4) EF83 Valvo Germany NOS 1960-1965 $20
EF85=6BY7 Pentode 4) EF85 Philips Miniwatt Holland NOS "D" getter 1961 $12 5) EF85=6BY7 Siemens branded Telefunken NOS 1969 $12 3) EF85 Sylvania Hungary NOS 1970's $8 3) EF85 International Hungary NOS 1970's $8
EF86=6267 EF86=6267 Holland/Mullard/GEC/Telefunken NOS listed here: [ 6267=EF86=Z729=EF806S Amperex Bugle Boy - GEC - Mullard - Telefunken ]
EF89 Pentode Telefunken OPUS 6 from 1956 Blaupunkt radio TO BUY EF89
50) EF89=6DA6 Telefunken <> Diamond Bottom NOS $20 ea or (4 for $72) 1) EF89 Telefunken <> used/good $10
EF91=CV138=6AM6 - Little Dot I+ Hybrid 2) EF91 Philips Miniwatt UK black plate "D" getter 1950's $10 ea 1) EF91=6AM6 Mullard BVA NOS "D" getter 1958 $10 (Gm=4800) 2) EF91 Philips by Mullard NOS 1968 $5 (not a pair) (Gm=5000 and Gm=4300) 1) EF91 Philips Miniwatt by Mullard NOS 1960's $5 1 pair $15) EF91 Mullard branded Siemens Halske NOS 1966 same date codes in white boxes (Gm=4300-4400) 1 pair $15) EF91 Ultron Germany coated glass branded Ultron England NOS 1960's 2) EF91 Ultron Germany coated glass branded Ultron England NOS 1960's $5 1) EF91 Mullard NOS 1970 $5 (Gm=4300) 1) CV138 Brimar UK NOS 1960's $5 (Gm=4250)
EF92=6CQ6 Mullard - Little Dot II++ headphone amp (2008) 1 pair $13) EF92=6CQ6 Haltron England by Mullard "U" getter halo 1950's - 1960 used/good - reboxed
EF94=6AU6 Telefunken TO BUY EF94 Telefunken
20) EF94=6AU6 Telefunken NOS 1950's - 1965 $50 ea (SEE 6AU6 for EF94 stock)
EF95=6AK5 Telefunken Germany / Mullard UK (also see 6AK5 listing) TO BUY EF95 Telefunken

EF97 / EF98 5) EF97 NOS $5 3) EF98=6ET6 Amperex NOS $5
EF732/ EF800 0) EF732=5840 Siemens NOS (Soundelux u99) 1) EF800 Telefunken <> NOS $75
EF804 / EF804S Telefunken Germany (Special Quality 10,000+ Low Noise Pentode for microphones) HISTORY: ------- In 1951 Telefunken started the 800 Series tube design and offered their improvement to the EF12 design; the EF804S is an identical version of the EF40/EF86 but with a different pin layout that offered less cross talk from the 1950 standard AC heated filament. They also used an improved cathode base material which is a nearly microphonic-proof construction with a cathode coating. This tube was mainly used for the AEG/Telefunken Magnetophone production, but evolved into much of the professional studio equipment of the time. First the V72 was re-equipped with this state of the art Telefunken EF804S audio tube made in their Berlin and Ulm production. In 1967 in London, England, producer George Martin started to use EF804S equipped V72 pre amps for THE BEATLES ALBUM "SARGENT PEPPER" . TO BUY EF804 and EF804S Telefunken

EF806S Telefunken EF806S Telefunken <> listed here:
  • [ EF806S Telefunken ]
    EK Series 0) EK-2 Philips Nonode NOS
    EL Series 1) EL-1C=3B22 NOS $25
    EL2 / EL3/EL3N Pentode 1) EL2 Dario used $30 0) EL3/EL3N (9 watt pentode)
    EL5 Pentode 1940's (EL5=18 watt pentode, Vfil=6.3V @ 1.35A, Vplate max=250V, Iplate max=72ma, Gm=8500) TO BUY EL5

    EL6 Pentode 1940's (EL6: Vfil=6.3 @ 1.2A, Vplate max=250V, Pout max=18 watts, Gm=14,500) 0) EL6
    EL12 Pentode / EL22=CV304 1) EL12 used $25 2) EL22 American made by Electrons, Inc., NJ NOS (4-pin tube) $30 0) EL22=CV304 European made octal tube
    EL33 Mullard (EL33 is little brother of EL37, Vplate max=250V, 8 watts PP, similar to KT61) 0) EL33 Mullard
    EL34=6CA7 Holland / Mullard / Siemens / Telefunken TO BUY EL34

    EL36=6CM5 Pentode - Klein + Hummel Telewatt Stereo-Nova VS-70 1962 TO BUY EL36

    EL37 PENTODE TO BUY EL37

    EL38=6CN6 Pentode TO BUY EL38

    EL39 Pentode (octal base) with top cap (the EL39 succeeded the 4654K) TO BUY EL39

    EL41 / EL42 - Telefunken ID54U/S car radio 0) EL41 EL42 NOS Pentode $15: 3) Amperex England by Mullard 1) Mullard branded Siemens
    EL50 Pentode (transco base) with top cap (EL50 replaced the 4654) TO BUY EL50

    EL51 0) EL51
    EL60 Holland 1950's (Loktal EL34) TO BUY EL60

    EL83 (sub for Russian 6P15P-EV) -modified VOX AC30 -Decware TO BUY EL83

    EL84 = 6BQ5 / 7189 PENTODE (uprated sub) TO BUY EL84

    EL91 / EL95 TO BUY EL95

    EL152 / EL153 0) EL152 TO BUY EL153 Telefunken

    EL156 0) EL156
    EL500 / EL503 Power Pentode 2) EL500=6GB5 GE NOS $5 0) EL503 Philips Miniwatt
    EL803/EL803S Pentode 3) EL803 Telefunken NOS $20 4) EL803S Telefunken NOS $20
    EL821=6CH6 / EL822 / EL3010 6) EL821=6CH6 Brimar UK black plate like new 1960's $15 ($35/matched pair) 25) EL822 Mullard NOS $20 (similar to EL821) 0) EL3010
    EK Series 0) EK2
    EM1 Philips Miniwatt Holland 1950's (tuning eye) TO BUY EM1

    EM4 Holland 1950's (tuning eye) TO BUY EM4

    EM11 Telefunken (tuning eye) EM11 Stock

    EM34=CV394 Mullard (tuning eye) EM34 Stock

    EM71 / EM80 / EM81 / EM84 / EM85 / EM87 EM71 / EM80 - EM87 Stock

    EMM801 / EMM803 Germany EMM801 / EMM803 Stock

    EY51 / EY91 1) EY51 Philips NOS $10 (high voltage rectifier for use in television and similar EHT circuits) 1) EY51 Valvo West Germany NOS $10 9) EY91 International Great Britain NOS "D" getter $5
    EZ11 / EZ14 / EZ40 rectifier 1) EZ11 Telefunken used $50 1) EZ14 Telefunken used $50 2) EZ40=6BT4 Mullard NOS 1950's $10 (1) branded RCA
    F2a Siemens - Shindo amp Vplate=250V, Vscreen=250V, Vgrid=-7V, Iplate=90ma TO BUY F2a Pairs and single tubes

    FP Series
    G Series / H Series 0) GR-16 Gerberus Swiss made NOS $10 5) GR-P22 GE JAPAN NOS $10 2) GXU50 GEC NOS 1970 $25 6) HL92 Miniwatt Holland NOS $20
    KT33C=CV1503 / KT61 / KT63 (similar to 6F6G) / KTW63 1) CV1503=KT33C GEC NOS original box $50 1) KT61 Osram England used/good, with broken center guide pin $25 1) KT63 Marconi MO-Valve England NOS $50 (84ma) high 1) KT63 Marconi MO-Valve England NOS $60 (55ma) 1) KTW63 Marconi NOS $25
    KT66 GEC / Genalezx / Gold Lion / Osram TO BUY KT66
    KT77 GEC / Genalex / Gold Lion TO BUY KT77
    KT88 GEC / Genalex / Gold Lion / Osram TO BUY KT88
    3) KTZ41 Osram England NOS $25
    LCP86 / LG10 / LS50 0) LCP86 Telefunken 4) LG10 Lorenz Germany $100 2) LG10 sockets like new $60 0) LS50 Telefunken used $35 (Pentode, World War II) 0) LS50 sockets used $40
    LV30 6) LV30 Telefunken with "Wehrmacht logo" like new condition, dated around 1943 $40 (World War II) LV30 DATA: --------- Heater voltage 12.6V Heater current 550mA Anode voltage 250V Max anode voltage 1000V Screen voltage 250V Max screen voltage 400V Control grid voltage -6.5V Anode current 72mA Screen current 9.5mA Mutual conductance 15mA/V Anode dissipation 12W 0) LV30 sockets used $35
    M Series 1) ME1400 Mullard NOS $50
    OS 18/600 Pentode sold out) OS 18/600 Tungsram like new 1940's
    PABC80 / PC88 3) PABC80 Philips Miniwatt NOS 1958 $10 (9.5V @ 300ma) 1) PC88 NOS
    PCC84=7AN7 / PCC85=9AQ8 PCC84=(Vfil = 7V @ 300 ma) (Vplate=90V, Vgrid=-1.5V, Iplate=12.0ma, Rp=4000 ohms, Gm=6000) 0) PCC84=7AN7 Telefunken 0) PCC85=9AQ8 GE Italy NOS $5 1) PCC85 Siemens Germany NOS $6 0) PCC85 Philips Holland NOS 1969 $6 (Vfil = 9.5V @ 300ma)
    PCC88=7DJ8 (sub for 6DJ8 with 7V Filament) - EAR - CJ TO BUY PCC88=7DJ8
    SIEMENS: ------- TESLA: -----
    PCC189=7ES8 Dual-Triode (Vfil=7.6V @ 300ma, Philips data book 1969)(Frame Grid Dual Triode) (Typical Characteristics: Vplate=90V, Iplate=15ma, Vgrid=-1.4V, Gm=12500, Mu=31) (Vplate max=130V, Ipplate max=22ma) (it is NOT normally recommend to substiture a PCC189 for a 6922) 2) PCC189=7ES8 Siemens NOS $15 (not pair, 2 singles) 1) PCC189=7ES8 Tungsram NOS $10 1) PCC189 Adzam used/tested $5
    PCF Series 1) PCF86 Telefunken used $6 3) PCF201 Valvo Holland NOS 5) PCF801 Telefunken NOS $10 1) PCF801 Siemens branded Telefunken like new, smeared printing $8 1) PCF803 Telefunken NOS $10 1) PCF803 Telefunken used $6
    PCL Series 1) PCL81 Telefunken NOS $15 1) PCL82 Miniwatt Holland NOS 1961 $10 4) PCL83 International Mullard $5 0 tube $0) PCL86=14GW8 Telefunken NOS (SHINDO PREAMP) 1) PCL805 Valvo Germany NOS 1970 $10 2) PCL805 International Mullard made in JAPAN NOS $5
    PEN45 0) PEN45 Mazda England BVA
    PL82 / PL500=27GB5 1) PL82 Miniwatt NOS $10 1) PL500=27GB5 GE JAPAN NOS $8 1) PL500 ITT JAPAN NOS $8 1) PL500 Tungsol Holland NOS 1964 $18 2) PL500 Mullard NOS branded Sylvania 1960's $15 2) PL500 International made in Holland $12 5) PL500 East Germany NOS $8
    PX4 Power Triode (4.0 Filament @ 1A) Class Va Vg1 Ia Ra S Rk Zout Pout THD A S/E 300 -45.0 50.0 830 6.0 1,000 3,500 4.5 4 sold out
    PX25 Power Triode PX25 ratings: Vfil=4V @ 2A, Vplate max=500V, Vgrid=-54V, Iplate=82ma, mu=26 VR40 = PX-25 Balloon NOS in military boxes (The VR40 is the PX25 (PP5/400) military grade version, the best sold

    Click here to download PX-25 Osram pdf file
    DISPLAY TUBE (low emission): --------------------------- 1 tube $40) PX-25 Osram weak display tube
    PX25 Power Triode (reference pictures)
    PX-25 GEC England (reference picture)
    PY32 / PY81 / PY82 1) PY32 Mullard NOS $25 (rectifier) 1) PY81=17Z3 International JAPAN NOS $5 1) PY81=17Z3 Amperex Bugle Boy Italy NOS $5 1) PY82=19Y3 Brimar NOS $5
    TO BUY RG62 half-wave rectifier
    TO BUY RGN1054 Telefunken (2 x 300Vplate, 60ma max)
    TO BUY RGN1064 Telefunken (2 x 500Vplate, 75ma max)
    RL2,4P2 Lorenz Germany used/good 1944 (WWII) TO BUY RL2,4P2

    RL12P35 Telefunken Pentode TO BUY RL12P35=RS287 Telefunken 1940's
    TO BUY RS237 Telefunken
    TO BUY RS242 Telefunken
    TO BUY RV2P800
    TO BUY RV12P4000
    TO BUY TT21 (6.3Vfil)
    TO BUY TT22 (12.6Vfil)
    TO BUY U Series Tubes
    TO BUY U19

    VF-14 / VF-14M TELEFUNKEN West Germany (Microphone Pentode) - Neumann U47 mic 0) VF-14 0) VF-14M Heater voltage: VF14 = 55V UF14 = 25V EF14 = 6.3V Heater current VF14 = 50mA UF14 = 100mA EF14 = 470mA Typical operating conditions for VF14, UF14, EF14: Anode voltage = 250V Screen voltage = 200V Control grid voltage = -5V Anode current = 12mA Screen current = 1.9mA Mutual conductance = 7mA/V Anode dissipation = 5W