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OUTPUT PENTODE
Output pentode rated for 25W anode dissipation, intended for use in ac. mains operated equipment.
E134
HEATER Vh Iii
CAPACITANCES
coat
cmn
ca-gi cgl-li Ch-k
6.3 V 1.5 A
8.4 pF 15.2 pF
<1.0 pF <1.0 pF 11 pF
CHARACTERISTICS
Pentode connection Triode connection (g2 connected to a)
V„ 250 V V0 250 V Vgz 250 V I;, 70 mA V, :3 0 V Vgi -15.5 V I„ 100 mA gm 11.5 mA/V Ig2 15 mA ra 910 S2 Vgi -12.2 gm 11 ra 15 iag1-g2 11
V mA/V
kit
µ 10.5
Vgi max. (Igi = +0.31LA) —1.3 V
OPERATING CONDITIONS AS SINGLE VALVE CLASS "A" AMPLIFIER
Pentode connection
Va 250 300 V Vg2 250 300 V Vg3 0 0 V Rk 106 190 S2 Ra 2.0 3.5 k≤1 Ia 100 83 mA Ig2 15 13 mA Vin(r.m.s.) (Pout = 50mW) 500 450 mV Vinlr.m.s.) 8.0 8.2 V
* Pout 11 11 W *Dtot 10 10 %
* ?out and Di01 are measured at fixed bias and therefore represent the power output available during the reproduction of speech and music. When a sustained sine wave is applied to the control-grid the bias across the cathode resistor will readjust itself as a result of the increased anode and screen-grid currents. This will result in a reduction in power output of approximately 10%.
JANUARY 1964 Page D1
E134 OUTPUT PENTODE
OPERATING CONDITIONS FOR TWO VALVES IN PUSH-PULL
Distributed load conditions for maximum output (screen-grid tapping at 20% of primary turns)
Vb 450 V Rg2 (per valve) 1.0 kit Rk (per valve) 500 S2 Ra- a 7.0 kit la(o) 2 x 55 mAF Ig2(o) 2 x 9.0 mAF Vin(gl—gl)r.m.s. 55.2 V Pout 40 W Dtot 4.5 % la(max.sig.) 2x74 mA lg2(max. sig.) 2 x 9.0 mA
Distributed load conditions for minimum distortion (with screen-grid tapping at 43% of primary turns)
Vb Rg2 (per valve)
430 1.0
430 1.0
V kit
Rk (per valve) 470 470 12 Ru- a 6.0 6.0 k12 l a(o ) 2> 62.5 2 x 62.5 mA 1g2(o) 2 x 10 2 x 10 mA Vin(gl-gl)r.m.s. 35 50 V Pout 20 34 W Dtot 0.35 2.5 % Ia (max, slg.) 2 x 65 2 x 70 mA Ig2(max. sig.) 2x10.2 2 x 14 mA
OPERATING CONDITIONS FOR TWO VALVES IN PUSH-PULL
Fixed bias
Vb 375 400 V Vg3 0 0 V
*Rg2 600 800 12 Vgl -33 -36 V Ra—a 3.5 3.5 k12 la(o) 2x 30 2x30 mA 1g2(o) 2x4.7 2x4.5 mA Vin(gl—gl)r.m.0. 46.7 50 V Pout 48 54 W Dtot 2.8 1.6 la(max. sig.) 2x107.5 2x110.5 mA Ig2 (max. sig.) 2x 23.5 2x23 mA
*Screen-grid resistor common to both valves.
JANUARY 1964 Page D2
OUTPUT PENTODE E134
Cathode bias
2
2
Vi, 375 Vg3 0 * Rg2 0.47
Rk (per valve) 260 Ra_a 3.5 la(o) 2 x 75 'g2(o) 2x12.5 Vin(gl—gl)r.m.s. 40 Pont 35 Dtot 1.7 Ia(max. sig.) 2 x 94 Ig2(max. sig.) 2x19.5
*screen-grid resistor common to both valves.
450 V 0 V 1.0 Id
465 S2 6.5 k[
2 x 60 mA x 10 mA
54 V 40 W
5.1 % 2x71.5 mA
x 22 mA
OPERATING CONDITIONS FOR TWO VALVES IN PUSH-PULL Triode connection (g2 connected to a, g3 to k) with separate cathode
bias resistors.
With Rk bypassed
Vb
Va Vg3
Rk (per valve) Ra—a la(o) Vin(gl—gl)r.m.s.
Pout Dtot Ia(max. sig.)
With Rk unbypassed
Vb
Va Vg3
Rk (per valve) Ra—a Ia(o) Vin(gl—gl)r.m.s.
Pout Dtot Ia(max. sig.)
APRIL 1962
(( M`u`llaarrd i
V
430 V 400 V 0 V
440 S? 5.0 kL(
2x70 mA 48 V 19 W 1.8
2x75 mA
430 V 400 V 0 V
440 ~≥ 10 Id)
2x70 mA 48 V 14 W 0.4 %
2 x 73 mA
Page 03
E134 OUTPUT PENTODE
OPERATING CONDITIONS FOR TWO VALVES IN
WITH CONTINUOUS SINE WAVE DRIVE
Fixed bias
PUSH-PULL
Vu 375 400 V
V53 0 0 V
R52 1.0 1.5 kS2
Vgl —32 —35.5 V
Ra_a 3.5 3.5 kS
la(, ) 2><30 2 x 30 mA
152(0 ) 2>< 4.4 2 x 4.4 mA
Vin(g1—gi)r.,n... 45 50 V
Ponr, 42 51 W
D0 t 3.0 1.8 °,,
la(rnax. sig.) 2>< 98 2 x 106 mA
Ig2(rnas. sig.) 2x19 2x21 mA
Cathode bias Any of the cathode bias conditions published in this data sheet are
suitable for continuous sine wave drive.
DESIGN CENTRE RATINGS
Va(b) max. 2.0 kV
Va max. 800 V
Pa max. 25 W
Vg2(b) max. 800 V
Vg2 max. 500 V
pee max. 8.0 W
l max. 150 mA
R51—x max. 500 kQ
Vi,_(, max. 100 V
max. 20 k12
Triode connected Va max. 600 pa-i e5 max. (Va = 500V) 30
Pa- g2 max. (Va = 600V) 15
V W W
APRIL 1962 M~uullaarrd
Page D4
OUTPUT PENTODE E134
62991
g3
gl
kh h
g2
g3 k
Octal Base
h
All dimensions in mm
Th
33.3 max
x a E N
JANUARY 1960 (1) Mullard
V Page DS
O
e
O
OUTPUT PENTODE E134
EL 34
Ia
192
-40 -20 0
i.M
-
1
4130
O U) N
V91(V) -60
i (m A)
400
300
200
100
0
ANODE AND SCREEN-GRID CURRENTS PLOTTED AGAINST CONTROL-GRID VOLTAGE WITH ANODE AND SCREEN-GRID VOLTAGES AS
PARAMETERS
~1 Muul laarrd
JANUARY 1960 (I) Page Cl
E134 OUTPUT PENTODE
O, -
> > In N N
1
> O T
1
I 1
0
0
0
0
0
i ,I> In
1 1 1 1 1
I I
0 >a
i 1 1 I
1 1 I I
1 1 1
1
1
1 11 I
I
/Pt1 Pt I
1 ,
InCMN P
a°
t I
8
/
i
> >o
O V
0 Ih
O O N
0 0
O
oa E 0) CM
O O
ANODE CURRENT PLOTTED AGAINST ANODE VOLTAGE WITH CONTROL-GRID VOLTAGE AS PARAMETER
JANUARY 1960(1)
~1 M`u`llaarrd
V Page C2
OUTPUT PENTODE E134
EL34
Triode connected
I
Io
(m A)
200
150
100
50
ANODE CURRENT PLOTTED AGAINST CONTROL-GRID VOLTAGE WITH ANODE VOLTAGE AS PARAMETER WHEN TRIODE CONNECTED
JANUARY 1960 (1) Page C3
EL34 OUTPUT PENTODE
V M J W
Triode connected
InM
1
>
O
>
In
>
O N
>
In N
8.4
r I
I 4. I
1
1. 1 >
1
4"
1S.
I
1a m C
O O V
O O M
O O N
O O
O
O Q H E
O O O
N 8 O
ANODE CURRENT PLOTTED AGAINST ANODE VOLTAGE WITH CONTROL-GRID VOLTAGE AS PARAMETER WHEN TRIODE CONNECTED
JANUARY 1960 (1) Page C4
OUTPUT PENTODE E134
(O
a 0 O \
N
H 1 ■
'—U
'U I—. ~w■ Iw■
O M
W 'I I'
3
a~
O
m
(O
a
N
O
O O 1') N
O O
YI c E 2 ' >ya `
N 0 O
PERFORMANCE OF EL34 WHEN USED AS A SINGLE VALVE CLASS `A' AMPLIFIER. Va = 250V
JANUARY 1960 (1) Mauullaarrd
V Page CS
E134 OUTPUT PENTODE
PERFORMANCE OF EL34 WHEN USED AS A SINGLE VALVE CLASS 'A' AMPLIFIER. Va = 300V
JANUARY 1960 (1)
- 1 M`u`llaarrd
V Page C6
OUTPUT PENTODE E134
Io 0)rnM
r17
w
'^ o c o m
L a
caC-Oy
~ U
OC L o rn E
C Yd n
a O ~ d aL L o
O ~3N
*P
er
val
ve
0 8 N
8
O
3 3 O a-
O v
O
0 N
O
O
PERFORMANCE OF TWO EL34 IN PUSH-PULL WITH DISTRIBUTED LOAD CONDITIONS. SCREEN-GRID TAPPING AT 20 OF PRIMARY TURNS
JANUARY 1960 (1)
l~ M`uulla/rrd
V Page C7
E134 OUTPUT PENTODE
o ~- a
rnaO a
00 C rnO Ca •aye 9 aC
L
U y
S~~ mo
V N ~a
7 L N~
a 3a
* *
a
a
>
0 a
a M J W i
I
I
i 1
$Y E
O O O
O~ N
C >
O
a
M
O N
O
O
PERFORMANCE OF TWO EL34 IN PUSH-PULL WITH DISTRIBUTED LOAD CONDITIONS. SCREEN-GRID TAPPING AT 43% OF PRIMARY TURNS
JANUARY 1960 (1)
f l M`u`llaarrd
V Page C8
OUTPUT PENTODE E134
I
HE c o 0
>
PERFORMANCE OF TWO EL34 IN PUSH-PULL WITH FIXED BIAS V7, = 375V
O
0
JANUARY 1960 (1) Muliard
Page C9
E134 OUTPUT PENTODE
m C)rnM a
> a
Ca
a
3 a a°
O v
1 N
O
O
os-a (O O N O
H E
8 O O
N
O
O Y (O
01
C>
>
O
PERFORMANCE OF TWO EL34 IN PUSH-PULL WITH FIXED BIAS Vb = 400V
JANUARY 1960 (1) M`n`l~la/Jr'd I
V Page C10
N p
OUTPUT PENTODE E134
N H H
>
N
J W
Q C: Ci sh
>co RO N'; N N V N N "
N •
> K D H *
\\\
04
x N
S L
8 2
N O
b 0 N
N2 0 0 0 0 0
u
0 L (O V N 0
0
In N
O N
N
O
Ii)
0
PERFORMANCE OF TWO EL34 IN PUSH-PULL WITH CATHODE BIAS Vb = 375V
JANUARY 1960 (1) Mullard I
V Page 0711
o^
E134 OUTPUT PENTODE
m 0)rn
a
U)w
O
UW
Y
>
ya i
a°
O Q
O N
O
O
e4N
O O O
O O O V N
4
0-
w O
J
PERFORMANCE OF TWO EL34 IN PUSH-PULL WITH CATHODE BIAS V1, = 450V
JANUARY 1960 (1) ) Page C12
t0
OUTPUT PENTODE E134
0 rnr~
aT
CC_
>
v M W
Trio
de
connecte
d
3
0 a
0 N
N
O
JO
O
O N O
oe O"
c N O
O
PERFORMANCE OF TWO EL34 IN PUSH-PULL WHEN TRIODE CONNECTED AND THE CATHODE BYPASSED
JANUARY 1960 (1) Page C13
HE
E134 OUTPUT PENTODE
IO1 M
b
a0 a
C 0 S
0 > S a *
0 H
0 1 0)
C
>
0
O
O -JUW
Triode connected i i
a~
~D
N
O
a
oa ~ 8 O
~E I a N 9 >~
In O N O
PERFORMANCE OF TWO EL34 IN PUSH-PULL WHEN TRIODE CONNECTED AND THE CATHODE UNBYPASSED
JANUARY 1960 (1) Page C14