7496

Rugged seven-pin all-glass variable-mu pentode for RF and IF applications. Special electrode, cathode, heater, and glass construction reduce catastrophic failures and support long cutoff operation, frequent heater switching, and low leakage.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 300 mA

Description

The 7496 is a seven pin all glass construction variiu pentode for use in R.F. and I,F, applications. The use of a special rugged electrode construction manufactured by means of semi-automatic assembly technigues contributes to a low catastrophic failure rate. The cathode sleeve is made of a special alloy to inhibit the growth of cathode interface resistance during long periods of operation under cut-off conditions and the pure tungsten heater has been designed to withstand frequent heater switching (see note). In addition, the heater-cathode construction and materials ensure very low levels of leakage throughout life, The glass base and envelope strain patterms are tightly

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 300 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

Pentode

X-ray radiationInterelectrode capacitances

Max plate voltage: 330 V
Max screen voltage: 135 V
Max plate dissipation: 3 W
Max screen dissipation: 0.7 W

Primary electrical section; identical repeated sections compressed where applicable.

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

1954 STC Brimar

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Voltage (ac or dc) 6,3 volts
6.3 V
Voltage (ac or dc) 6,3 volts
Current 0.3 amps
300 mA
Current 0.3 amps
Heater negative with respect to cathode ...veene. 150 volts
150 V
Heater negative with respect to cathode ...veene. 150 volts
Heater positive with respect to cathode e..cev.e. 150 volts
150 V
Heater positive with respect to cathode e..cev.e. 150 volts

Other

Maximum anode voltage (I = 0) ..... e, ... 500 volts
500 V
Maximum anode voltage (I = 0) ..... e, ... 500 volts
Maxinum anode VOLL2EE ecvecscesasasssocsnncnsssans s 330 volts
330 V
Maxinum anode VOLL2EE ecvecscesasasssocsnncnsssans s 330 volts
Maximum anode dissipation .icocs.. cessencasecoe P .3 watts
3 W
Maximum anode dissipation .icocs.. cessencasecoe P .3 watts
Maximum screen voltage (Ig2 = 0) cueeversnscncansoss 330 volts
330 V
Maximum screen voltage (Ig2 = 0) cueeversnscncansoss 330 volts
Maxirmm screen vOlbtage veesssssrsscssesosonocascoanos 135 volts
135 V
Maxirmm screen vOlbtage veesssssrsscssesosonocascoanos 135 volts
Maximum screen dissipation ceeesesvecscsosess Cesenee 0.7 watts
0.7 W
Maximum screen dissipation ceeesesvecscsosess Cesenee 0.7 watts