9D7 @ The Valve Museum

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9D7

Sensibly equivalent^¶ to:

CV5409

Extras ▼

Brimar G8LSD Valve Collection

The 9D7 is a variable μ pentode. Brimar do not give a designated frequency range in their literature. As variable μ pentodes are used in AGC amplification systems, this suggests a role in IF amplification at up to 10.7 MHz.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 47 mm tall.

References: Datasheet, ³⁰⁰² & ¹⁰⁴⁰. Type 9D7 was first introduced in 1958.

Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	k	g1	k	h	h	s	a	g2	g3

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	mAa	gm
	6.3	0.3	250	100	10	8.4

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated January 31, 2013.

shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.k pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.s pin:7.a pin:8.g2 pin:9.g3

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9D7

Sensibly equivalent¶ to:

CV5409

Extras ▼

The 9D7 is a variable μ pentode. Brimar do not give a designated frequency range in their literature. As variable μ pentodes are used in AGC amplification systems, this suggests a role in IF amplification at up to 10.7 MHz.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 47 mm tall.

References: Datasheet, 3002 & 1040. Type 9D7 was first introduced in 1958.

Pin Connections

B9A

1

2

3

4

5

6

7

8

9

k

g1

k

h

h

s

a

g2

g3

Absolute Maximum Operating Conditions¶

Pentode

Vh

Ah

Va

Vs

mAa

gm

6.3

0.3

250

100

10

8.4

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated January 31, 2013.

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Sensibly equivalent^¶ to:

References: Datasheet, ³⁰⁰² & ¹⁰⁴⁰. Type 9D7 was first introduced in 1958.

Absolute Maximum Operating Conditions^¶