KT120 ETC2 | Alldatasheet
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27 Heater
i) ‘Plate 14 | The second grid 5 | The first grid 6 - 8 | Cathode,beam- | | forming plates Electrical data we Cathode _ Oxide, indirect heating Filament voltage (AC, DC 6.3v Under positive polarity at cathode 300 V Under negative polarity at cathode 200V interelectrode capacitance: | Input (nominal) 29 pF j Output (nominaf ee 10 pF Transfer (nominal _ 1B pF Mechanical data Operating position _ An) Dimensions: __ a ___Maximum height _ 130 mm_ Balloon diameter, max jo $2 mm —Maximum weight 1209 Basic specifications Electric Characteristics At delive: oe Parameter name Measurement mode not oe more Heater current, A 1.95 | Uf=6.3V Plate current, ma 165 | Uf=6.3V Ua=400V
~ Uc2=225V . Uct= -14V 4 The second grid current, - | Uf=6.3V 1 mA Ua=400V | Uc2=225V {
7 Uct=-14V |
Transconductance, mA/v 12.5 Uf=6.3V Ua=400V | | Uc2=225V ; - Uct=-14V00 Output power, W | 20.0 - Uf=6.3V Ua=400V | Uc2=225V | Uct= -14V | | Ucteff.=9.9V . . _ load resistance =3 KOhm Non-linear harmonic - 14 Uf=6.3V distortion coefficient, % Ua=400V j Uc2=225V Uct= -14V | Ucteff.=9.9V . __| load resistance =3 KOhm Cathode to heater 30 Uf=6.3V | leakage current, pA Uk-h=+300V i Limiting values [TT itiode scheme | tetrode scheme | PO min max min Tmax | | Filament voltage (AC,DC) | 5 7v | 69v | 57v | 69v_ | |Plate voltage, DC | TOV | 85 |Grid2 voltage, DC | SOV | 00 | Grid 4 negative voltage | 200v | 200 [Plate dissipation | | Ow TT Ow [Cathode current || 280mA | | 250 mA _| [Resistance in gridit circuit | TE |__atfixed (clamp) bias | | 0.057MOn || 0.054 MOh | |__atautomaticbias || 0.24 MOH | | 0.24 MOh | [Envelope temperature athottest point || 250°C [| 250°C |