EK2

Radio receiver frequency changer combining oscillator and mixer functions for superheterodyne conversion. Its multi-grid construction translates incoming RF signals to the intermediate frequency within the receiver front end.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: P8A
Base pins: 8
Nominal heater: 6.3 V / 200 mA

Description

EK2 is listed in the supplied valve table as a octode converter. Published operating and characteristic values were transcribed from its target row.

Socket description

European 8-pin side-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: P8A
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 200 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Octode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0009 S
Max plate voltage: 300 V
Max plate dissipation: 1 W
Max cathode current: 12 mA

Reference/equivalence sheet; operating tables not reproduced. Values were not imported from EK32.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Octode

Other

Plate voltage
250 V
Published table operating point
Screen voltage
200 V
Published table operating point
Plate current
4 mA
Published table operating point
Control-grid bias
4 V
Published table operating point
Alternate plate voltage
100 V
Converter OperatingPoint1
Alternate screen voltage
100 V
Converter OperatingPoint1
Alternate plate current
1.5 mA
Converter OperatingPoint1

Characteristic

Transconductance
900 µS
Published table characteristic
Heater/filament voltage
6.3 V
Published heater/filament rating
Heater/filament current
200 mA
Published heater/filament rating
Conversion transconductance
550 µS
Converter

Data set 02

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Octode

Capacitance

Anode-control-grid capacitance
0.07 pF
Maximum
Anode-cathode capacitance
10 pF

Data set 03

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Octode

Characteristic

%, mehr als
1 Megohm
i Heizspannung . . . . . . . . . . .. .. Vi
63 V
Voss
9 V
Iy, [1]
200 pA
Iy, [2]
200 pA
Neg. Vorspannung an Gitter 4 [1]
2 V
Neg. Vorspannung an Gitter 4 [2]
15 V
I, [1]
1 mA
I, [2]
1 mA
Iy + Iy [1]
1 mA
Iy + Iy [2]
1 mA
I, [1]
1.5 mA
I, [2]
2.1 mA
Se [1]
550 pA/V
Se [2]
5.5 pA/V
Se [3]
2 uA
Se [4]
5.5 uA/V
Se [5]
2 pA/V
Iy [1]
32 mA
Iy [2]
5.5 mA
Va = 200
250 V
V2
200 V
Wps
50 V
600 Yau
2 V
/ [ - E : T bei Vg, [1]
200 V
/ [ - E : T bei Vg, [2]
50 V
Vosz [1]
6 v
Vosz [2]
6 V
g1 [1]
300 pA
g1 [2]
150 pA
4 —3 V1) — [1]
26 V
4 —3 V1) — [2]
40 V
Ia [1]
2.5 mA
Ia [2]
2.1 mA
Iy + Igs [1]
2.8 mA
Iy + Igs [2]
1.5 mA
I, [1]
2.3 mA
I, [2]
4 mA
Mischsteilheit [1]
550 uA/V
Mischsteilheit [2]
5.5 pA/V
Mischsteilheit [3]
1 pA
Mischsteilheit [4]
550 pA/V
Mischsteilheit [5]
5.5 uA/V
Mischsteilheit [6]
1 pA/V
S£182 [1]
0.35 mA/V
S£182 [2]
0.9 mA/V
i i jj_ﬁ—" Vg2
200 V
8001114 {—Tl' T Vem
9 V
bei Vg, [1]
200 V
bei Vg, [2]
80 V
800 /2= g2«
100 V
Vas
80 V
Yyt
-3 V
1 P g bei Vg, — [1]
100 V
1 P g bei Vg, — [2]
80 V
spannung bei Vgy [1]
100 V
spannung bei Vgy [2]
50 V
A Vorspannung (also bei Vy1
0 V
[ DerWert von
15 V
Wt VautOOV [Van
250 V
Oszillatorspannung (s. Abb. 4) geht hervor, dafl bei Spannungen von 9 bis
10 V
Steilheit sogar noch giinstiger ist als bei
15 V
~30 V2a [1]
100 V

Other

Va [1]
100 V
Va [2]
250 V
Vgss [1]
50 V
Vgss [2]
50 V
Oszillatoranodenspannung [1]
100 V
Oszillatoranodenspannung [2]
200 V
Anodenspannung [1]
100 V
Anodenspannung [2]
250 V
Vg 3.5 [1]
80 V
Vg 3.5 [2]
80 V
Oszdlatoranodenspannung [1]
100 V
Oszdlatoranodenspannung [2]
200 V
Vaeo = max [1]
550 V
Vaeo = max [2]
1.3 W
Va = max [1]
300 V
Va = max [2]
12 mA
Wa = max [1]
1 W
Wa = max [2]
0.3 pA
Wa = max [3]
13 V
Vg3,50 = max
550 V
V35 = max
125 V
We3s5 = max
0.3 W
Ve2o == max
550 V
Vj = max
225 V