Data: Pentodes

SMALL SIGNAL TETRODES / PENTODES
(all data shown is in triode mode)
tube type
Uf
(V)
If
(A)
Ua
(V)
Ia
(mA)
Ug
(V)
Rp
(ohm)		 mu
gm
(mA/V)		 Pa
max
(W)		 Ua
max
(V)		 Ik
max
(ma)

comment
E180F pentode 6.3 0.3 120 18 -0.9 2400 40 16.5 2.7     =6688
E184F pentode                        
E280F pentode 6.3 0.31       2300 60 26.0 4     =7722
E810F pentode 6.3 0.34 166 26 -2.6 1000 50 50 5     =7788
5847 pentode 6.3 0.3           12.5 3.3     =404A
D3a pentode 6.3 0.31 200 30   2000 68 34 4.5      
                           
6E5P tetrode 6.3 0.6 160 43 -1.8 1113 34.4 31.2 8.3 250 100  
6E6P tetrode 6.3 0.61 160 39 -1.8 1244 34.0 27.5 8.25 150 70 ~6E5P
6Z1P pentode 6.3 0.17 120 8 -2     5 1.2 120 13 ~6AK5
6Z9P pentode 6.3 0.3 125 16   1000 36 35 3.75 160 22  
6Z11P pentode 6.3 0.44 150 40   1200 40 33 6 150 40  
6Z49P pentode 6.3 0.3 200 16   2500 44 17.5 3.4 160 22.5  
6Z51P pentode 6.3 0.3 150 23   2700 78 29 2.5     ~E184F
6Z52P pentode 6.3 0.33       1000 50 50 10     ~E810F


Some operating points thanks to Pete Millett and Ale Moglia.

 

 

POWER TETRODES / PENTODES
tube    
If
(A)		 Pa
max
(W)		 Pg2
max
(W)		 Ua
max
(V)		 Ug2
max
(V)		 Ik
max
(mA)


Po
(W)
Rp
(ohm)		 mu
gm
(mA/V)		 comment
4P1L pentode 4.2 0.325 7.5 1.5 250 250 50 2.5 1100 8 6.0 directly heated, triode connected
EL84 pentode 6.3 0.76 12 2.0 300 300 65 4.5   19 11.3  
                           
6L6GC tetrode 6.3 0.9 30 5.0 500 500 66? 10.8     5.0  
5881 beam pentode 6.3 0.9 23 3.0 400 400 80? 11.3     5.3  
KT66 beam pentode 6.3 1.3 25 3.5 500 500 200 16     5.5  
                           
EL34 pentode 6.3 1.5 25 8.0 800 425 150 10 1000 11 11.0  
EL34 Svetlana pentode 6.3 1.5 25 8.0 800 600 150   1000 11 11.0  
EL34B pentode 6.3 1.5 25 8.0 800 425 150 11 1000 11 11.0  
6CA7 pentode 6.3 1.5 25 8.0 800 425 150 11 1000 11 11.0  
KT77 beam tetrode 6.3 1.4 25 6.0 600 600 180   1100 11.5 10.5  
                           
6550C                          
KT88 beam pentode 6.3 1.6 35 6.0 600 600 175   695 8 11.5  
KT120 pentode 6.3 1.8 60 8.0 850 650 230 20     12.5  
KT150 pentode 6.3 1.85 70 9.0 850 650 250 20     12.6  
                           
                           



 

DIRECTLY HEATED PENTODES
tube   Uf
(V)		 If
(A)		 Ua^
(V)		 Ia^
(mA)		 Pd
(W)		 Ua
(V)		 Ug
(V)		 Ia
(mA)		 Rp
(ohm)		 mu gm
(µA/V)		 comment
4P1L pentode 4.2 0.325 250 50 7.5 180 -12 34.0 1335 8.3 6200 triode connected
2P29L pentode 2.1 0.12 200 20 2 160 -11 10.0 3970 8.6 2213 triode connected
2Z27L pentode 2.2 0.057 200 4   120   4 12000 16 1400 triode connected