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6CA7[Under Construction]

 

 

 

 

 

 

 

6CA7 is A.F. Output Pentode suitable for use in power amplification

 

Note that 6CA7 is essentially the same as EL34, except for the physical dimensions (i.e. diameter) as sketched below. Therefore, for downloading data sheet, please refer to EL34 page.

Quick reference data

  •     Anode current Ia=100mA

  •     Transcoductance S=12,5mA/V

  •     Amplification mg2g1=11

  •     Output power, Class B  WO=100W

Heating

Heating is indirect by AC or DC, with parallel supply. 

Heater voltage  Vf  6,3 (V)
Heater current  If  1,5 (A)

Dimensions and connections

Base: Octal

 

Operating characteristics

  •     Class A
Supply voltage  Vb 265 265 (V)
Anode voltage  Va 250 250 (V)
Grid No. 2 series resistor  Rg2 2 0 (kW)
Grid No. 3 voltage  Vg3 0 0 (V)
Grid No 1 . voltage  Vg1  -14,5 -13,5 (V)
Anode current  la 70 100 (mA)
Grid No. 2 current  Ig2  10 14,9 (mA)
Transconductance  S 11 12,5 (mA/V)
Amplification factor  mg2g1 11 11  
Internal resistance  Ri 20 17 (kW)
Load resistance  Raa 3 2 (kW)
Grid No. 1 driving voltage  Vi 9,3 8,7 (VRMS)
Output Power WO 8 11 (W)
Distortion  dtot 10 10 (%)
Grid No. 1 driving voltage for WO = 50 mW  Vi 0.65 0,5 (VRMS)
  •     Class B, two tubes in push-pull
Common grid No.2 series resistor 
(non decoupled)
Rg2 1000  470  (W)
Grid No.1 voltage  Vg1 -38 -32 (V)
Grid No. 3 voltage Vg3 0 0 (V)
Grid No. 1 driving voltage Vi 0 27 27 0 22,7 22,7 (VRMS)
Load resistance Raa   3,4 4   2,8 3,8 (kW)
Stupply voltage Vb 425 425 400 375 375 350 (V)
Anode voltage Va 420 400 375 370 350 325 (V)
Anode current la 230 2120 2100 235 2120 293 (mA)
Grid No. 2 current Ig2 24,4 225 225 24.7 225 225 (mA)
Output power WO 0 55 45 0 44 36 (W)
Distortion dtot   5 6   5 6 (%)

 

Common grid No.2 series resistor 
(non decoupled)
Rg2 750 750 (W)
Grid No.1 voltage  Vg1 -36 -39 (V)
Grid No. 3 voltage Vg3 0 0 (V)
Grid No. 1 driving voltage Vi 0 25,8 25,8 0 23,4 23,4 (VRMS)
Load resistance Raa   4 5   11 11 (kW)
Stupply voltage Vb 500 500 475 800 800 750 (V)
Anode voltage Va 495 475 450 795 775 725 (V)
Anode current la 230 2125 2102 225 291 284 (mA)
Grid No. 2 current Ig2 24 225 225 23 219 219 (mA)
Output power WO 0 75 58 0 100 90 (W)
Distortion dtot   5 6   5 6 (%)
  •     Class AB, two tubes in push-pull
Load resistance Raa

3,4

(kW)
Common grid No.2 series resistor 
(non decoupled)
Rg2

470

(W)
Common cathode resistor Rk 130 (W)
Grid No. 3 voltage Vg3 0 (V)
Grid No. 1 driving voltage Vi 0 21 (V)
Stupply voltage Vb 375 375 (V)
Anode to earth voltage Va+VRk 355 350 (V)
Anode current la 275 295 (mA)
Grid No. 2 current Ig2 211.5 222.5 (mA)
Output power WO 0 35 (W)
Distortion dtot   5 (%)

 

Limiting - maximal values (design center rating system)

Anode voltage Vao 2000 (V)
Va 800
Grid No. 2 voltage Vg2o 800 (V)
Vg2 500
Anode dissipation Wa(Vi=0) 25 (W)
Wa(Vi>0) 27,5
Grid No. 2 dissipation Wg2 8 (W)
Cathode current Ik 150 (mA)
Grid No. 1 resistor Rg1(Class A & AB) 0,7 (MW)
Rg1(Class B) 0,5
Cathode to heater voltage Vkf 100 (V)

 

See some graphs ...


 

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Copyright 2002 Ei Elektronske Cevi DOO
Last modified: 26.01.2003