| a | anode
|
| ad | parted (divided) anode
|
| A | Ampere (quantity of electric current)
|
| Å | Angstrom (wavelength 10-8 cm)
|
| A1 | telegraphic operation
|
| A3 | telephone operation
|
| AVC | automatic gain control (AGC)
|
| b | base (category 16, 17)
|
| bs | tube for driver stage in amplifier, working in class B
|
| B | photocell sensitive to white light (category 14)
|
| B | cathode-ray tube with white luminescent screen (category 13)
|
| Bp | overloading immunity of crystal diodes
|
| c | collector (class 16, 17)
|
| c/s | cycle per second, Hertz
|
| C | capacity
|
| °C | degrees Celsius
|
| Ca1a2 | capacity between anodes of first and second diode
|
| Ca1a3 | capacity between anodes of first and third diode
|
| Ca1k | capacity between anode of first diode and cathode (or filament)
|
| Ca2a3 | capacity between anodes of second and third diode
|
| Ca2k | capacity between anode of second diode and cathode (or filament)
|
| Ca3k | capacity between anode of third diode and cathode (or filament)
|
| Ca4k | capacity between anode of fourth diode and cathode (or filament)
|
| Cag | capacity between anode and first grid
|
| Cag2 | capacity between anode and second grid
|
| Cag3 | capacity between anode and third grid
|
| Cak | capacity between anode and cathode (or filament)
|
| Cb | capacity of base
|
| Cb1 | capacity of base 1
|
| Cb2 | capacity of base 2
|
| Ckd | capacity between anode of diode and cathode (in combined tubes)
|
| Cfk | capacity between filament and cathode
|
| Cg1g2 | capacity between first and second grid
|
| Cg2k | capacity between second grid and cathode
|
| Cg3k | capacity between third grid and cathode
|
| Cgk | capacity between grid and cathode
|
| Cv | input capacity
|
| Cvs | output capacity
|
| Cvst | input capacity of filter for suppression of ripple
|
| Č | photocell sensitive to red light (category 14)
|
| d | total distortion [%]
|
| dB | decibel
|
| det | detection
|
| det/a | anode detection
|
| det/g | grid detection
|
| dis | discriminator
|
| D | diode
|
| D | penetrance
|
| ef | root-mean-square value, RMS
|
| em | emitter (category 16, 17)
|
| es | electrostatic (deflection, focusing)
|
| Em | tube for measuring purpose
|
| Epp | tube for intermittent duty
|
| Es | combined tube
|
| Esv | beam tetrode
|
| ES | mixer tube
|
| ES+osc | mixer tube with oscillator
|
| Ešp | tube for amplifier with wide bandwidth
|
| Etp | tube for unintermittent duty
|
| f | filament
|
| f | frequency
|
| f50% | frequency, in which operational values may reach 50 % of limit values.
|
| f75% | frequency, in which operational values may reach 75 % of limit values.
|
| f100% | frequency, in which operational values may reach 100 % of limit values.
|
| ff | tube with two filaments
|
| fff | tube with three filaments
|
| fm | frequency modulation
|
| fmax | maximal frequency
|
| fmin max | frequency range
|
| F | Farad (unity of capacity)
|
| g | grid
|
| g1 | first grid
|
| g2 | second grid
|
| g2+a | second grid connected to anode
|
| g3 | third grid
|
| g3+a | third grid connected to anode
|
| g4 | fourth grid
|
| g5 | fifth grid
|
| g6 | sixth grid
|
| G | power gain
|
| Gc/s | gigacycle per second (109 c/s, giga Hertz)
|
| Ge | germanium
|
| H | cathode-ray tube with brown luminescent screen (category 13)
|
| ind | indicator
|
| ind 1 | the first indication part
|
| ind 2 | the second indication part
|
| inf | photocell sensitive to infra-red light
|
| ip | value in pulse operation
|
| Ia | anode current
|
| Ia0 | quiescent current (without excitation)
|
| Ia max | maximal anode current
|
| Ia max = | maximal rectified anode current
|
| Iap | average anode current
|
| Ia sig max | anode current on maximum signal
|
| Ia vh | limit peak anode current
|
| Iaz vh | limit peak reverse anode current
|
| Ib1 | current of base 1
|
| Ib2 | current of base 2
|
| Ic | collector current
|
| Id | diode current (on diodes in combined tubes only)
|
| Id vh | limit peak diode current (on diodes in combined tubes only)
|
| Idz vh | limit peak reverse diode current (on diodes in combined tubes only)
|
| Iem | emitter current
|
| If | filament current
|
| If max | maximal filament current
|
| Ig1 | current of first grid
|
| Ig2 | current of second grid
|
| Ig2 sig max | current of second grid on maximal signal
|
| Ig3 | current of third grid
|
| Ig3g5 | current of third and fifth grid
|
| Ig4 | current of fourth grid
|
| Ig max | maximal current of grid
|
| Igo | grid current in oscillator
|
| Ig vh | limit peak grid current
|
| Ik | cathode current
|
| Ik2 | secondary emissive current
|
| Ike | emissive cathode current
|
| Ik max | maximal cathode current
|
| Ik vh | limit peak cathode current
|
| Imax | maximal current
|
| Imax 1 | limit current in maximal duration 1 minute
|
| Imin | minimum current
|
| Imin max | current range
|
| Ip imp | limit pulse current in forward direction
|
| Ip min | minimum forward current on voltage 1 V
|
| Ip stř | limit average current in forward direction
|
| Iss | maximal rectified current
|
| Ist | screen current
|
| Itd | current in heating wire, whereat originate electromotive force 12 mV
|
| Izb | residual current (category 16, 17)
|
| Iz max | maximal reverse current for specific voltage
|
| k | cathode
|
| kc/s | kilocycle per second (103 c/s, kilo Hertz)
|
| ke | ceramics
|
| kv | metal
|
| kV | kilo Volt (103 V)
|
| kW | kilo Watt (103 W)
|
| kΩ | kilo Ω
|
| K | amplification (factor)
|
| Kv | power gain (dB)
|
| KP | pentode for output stage
|
| KPP | dual pentode for output stage
|
| KT | triode for output stage
|
| KTt | tetrode for output stage
|
| KTT | dual triode for output stage
|
| L | inductivity
|
| m | external shield (metallizing)
|
| max | maximal value (on currents and voltages it is limit root-mean-square value)
|
| mg | magnetic (deflection, focusing)
|
| mikro | microfonic amplification
|
| min | minimum value; minute
|
| mod | modulator; modulation
|
| mod % | depth of modulation
|
| mod/a | anode modulation
|
| mod/ai | anode pulse modulation
|
| mod/a+g2 | common modulation on anode and second grid
|
| mod/g | grid modulation
|
| mod/g1 | modulation on first grid
|
| mod/g2 | modulation on second grid
|
| mod/g3 | modulation on third grid
|
| mod/ip | pulse modulation
|
| mp | mechanical strength
|
| mA | mili Ampere (10-3 A)
|
| mH | mili Henry (10-3 H)
|
| mV | mili Volt (10-3 V)
|
| mW | mili Watt (10-3 W)
|
| M | photocell sensitive to blue light (category 14)
|
| M | cathode-ray tube with blue luminescent screen (category 13)
|
| Mc/s | megacycle per second (106 c/s, mega Hertz)
|
| MB | cathode-ray tube with blue-white luminescent screen (category 13)
|
| MΩ | mega Ω (106 Ω)
|
| nH | nano Henry (10-9 H)
|
| N | number determining dividing voltage in stabiliser
|
| NE | electron multiplier tube
|
| osc | oscillator, intended as oscillator (adjective)
|
| ov | tap in filament
|
| O | cathode-ray tube with orange luminescent screen (category 13)
|
| P | cathode-ray tube with long afterglow (category 13)
|
| pento | pentode connection
|
| pg | space charge grid
|
| pp | gas-filled tube (or mercury vapour)
|
| pF | pico Farad (10-12 F)
|
| Po | anode dissipation
|
| Po max | limit anode dissipation
|
| Pa | anode power input
|
| Pa max | limit anode power input
|
| Pb | driving power
|
| Pg0 max | limit dissipation in control grid
|
| Pg2 | dissipation in screen grid
|
| Pn | surge power
|
| P šd/PšR | noise temperature (ratio of noise power of diode to noise power of resistance)
|
| Pv | output power
|
| PP | push-pull connection
|
| r | cathode-ray tube with short afterglow (category 13)
|
| R | active resistance
|
| Ra | anode working (matching) external resistance
|
| Raa | working (matching) resistance from anode to anode (in push pull connection)
|
| Rad | anode filtration resistor
|
| Ra min | minimum anode resistance
|
| Rb | base resistance
|
| Rb1 | resistance of base 1
|
| Rb2 | resistance of base 2
|
| Rb1b2 | resistance between bases 1 and 2
|
| Rc | collector resistance
|
| Rem | emitter resistance
|
| Rf | resistance of filament (or heating wire)
|
| Rfk | resistance between filament and cathode
|
| Rg1 | bleeder resistor on first grid
|
| Rg1 max | limit bleeder resistor on first grid
|
| Rg2 | serial resistor on second grid
|
| Rg1g3 | common bleeder resistor od first and third grid
|
| Rg2g4 | common serial resistor od second and fourth grid
|
| Rg3 | bleeder resistor on third grid
|
| Rgo | grid resistor in oscillator
|
| Ri | internal resistance
|
| Ri max | maximal internal resistance
|
| Rk | cathode resistor
|
| Rp | parallel resistance
|
| Rš ekv | equivalent noise resistance
|
| Rtč | resistance of thermoelectric cell
|
| Rt min | minimum necessary resistance of winding in transformer
|
| Rv | input resistance (category 16, 17)
|
| Rvs | output resistance (category 16, 17)
|
| Rz | reverse resistance
|
| s | cathode-ray tube with middle afterglow (category 13)
|
| sem | secondary emission
|
| sig | signal; intended to working with signal (adjective)
|
| sig max | maximum signal
|
| sig min | minimum signal
|
| sk | glass
|
| sv | vertical deflection
|
| S | mutual conductance
|
| Sd1d2 | sensitivity of deflecting plates 1 and 2
|
| Sd3d4 | sensitivity of deflecting plates 3 and 4
|
| Sef | effective mutual conductance
|
| Sg3 | mutual conductance, when voltage of third grid varies
|
| Si | silicon (silicium)
|
| Sp | variable mutual conductance
|
| Ss | conversion transconductance
|
| tetro | tetrode connection
|
| ti | pulse width (duration)
|
| tp | hardened resin
|
| trio | triode connection
|
| tžh | warm-up time [min]
|
| T | triode
|
| Tt | tetrode
|
| Tv | television, intended to television (adjective)
|
| Ua | anode voltage
|
| Ua1 | voltage of first anode
|
| Ua2 | voltage of second anode
|
| Ua3 | voltage of third anode
|
| Ua ef | output voltage (root-mean-square value)
|
| Ua ip vh | peak anode voltage in pulse operation
|
| Ua max | maximum anode voltage
|
| Ua vh | limit peak anode voltage (on diode)
|
| Uaz vh | limit peak reverse anode voltage
|
| Ub | supply voltage
|
| Ub max | maximum supply voltage
|
| Uc | collector voltage
|
| Ud | diode voltage (in combined tubes only)
|
| Ud1 | voltage on first diode (in combined tubes only)
|
| Ud2 | voltage on second diode (in combined tubes only)
|
| Ud3 | voltage on third diode (in combined tubes only)
|
| Ud vh | limit peak voltage on diode (in combined tubes)
|
| Ue | voltage between first and aftermost electrode in stabilizer
|
| Uem | emitter voltage
|
| Uf | filament voltage
|
| Ufk max | limit voltage between filament and cathode
|
| - Ug1 | negative bias voltage on first grid
|
| Ug2 | voltage of second grid
|
| Ug2 max | maximum voltage of second grid
|
| Ug3 | voltage of third grid
|
| Ug3 max | maximum voltage of third grid
|
| Ug4 | voltage of fourth grid
|
| Ug4g6 | voltage of fourth and sixth grid
|
| Ug5 | voltage of fifth grid
|
| Ug ef | voltage of first grid (root-mean-square value)
|
| Ugg | voltage between grids in push-pull connection
|
| Ugg ef | voltage between grids in push-pull connection (root-mean-square value)
|
| Ug max | maximum voltage of grid
|
| Ugp | limit of variable grid bias voltage
|
| Ug vh | limit peak voltage of first grid
|
| Uk | cathode voltage
|
| Ukz | voltage of secondary emission
|
| Umax | limit voltage
|
| Uo | oscillator voltage
|
| Uo ef | root-mean-square value of oscillator voltage
|
| Uo vh | peak oscillator voltage
|
| Up | operation voltage
|
| Ust | voltage of screen
|
| Ut | voltage of cell
|
| Uv | tube voltage drop
|
| Uz | reverse voltage
|
| Uzap | ignition voltage
|
| vaku | vacuum (adjective)
|
| vh | limit peak value
|
| vo | wax
|
| vod | water cooling
|
| vs | internal screening
|
| vv | horizontal deflection
|
| vvf | very high frequency
|
| V | Volt (unit of electric voltage)
|
| Vys | tube is using also as transmitting tube
|
| W | Watt (unit of electric power)
|
| zes | amplifier
|
| zes ip | pulse amplifier
|
| zes mf | intermediate-frequency amplifier
|
| zes nf | audio amplifier
|
| zes vf | high-frequency amplifier
|
| zesv | power amplifier
|
| zesv nf | audio power amplifier
|
| zesv vf | high-frequency power amplifier
|
| zes A | amplifier in class A
|
| zes AB | amplifier in class AB
|
| zes B | amplifier in class B
|
| zes C | amplifier in class C
|
| zes O | video amplifier
|
| zp | parallel connection
|
| zs | connection in series
|
| zzg | common grid circuit
|
| zzk | common cathode circuit
|
| Z | photocell sensitive to green light (category 14)
|
| Z | cathode-ray tube with green luminescent screen (category 13)
|
| Zmf | intermediate-frequency impedance
|
| ZM | cathode-ray tube with green-blue luminescent screen (category 13)
|
| ZŽ | cathode-ray tube with green-yellow luminescent screen (category 13)
|
| Ž | cathode-ray tube with yellow luminescent screen (category 13)
|
| α | angle of screen
|
| γ | sensitivity
|
| γ s | deflection sensitivity of plates near the screen in CRT
|
| θ | temperature
|
| θ o | ambient tempetarure
|
| θ max | maximum operating temperatutre
|
| θ min | minimum operating temperatutre
|
| λ min | minimum wawelength
|
| μ | multiplication factor
|
| μA | mikro Ampere (10-6 A)
|
| μF | mikro Farad (10-6 F)
|
| μH | mikro Henry (10-6 H)
|
| μV | mikro Volt (10-6 V)
|
| σ | ratio between open-circuit voltage on secondary winding to current in primary winding on maximum primary load (approximative value)
|
| Ω | ohm (unity of electric resistance)
|