Vacuum Tubes

Vacuum tubes are a type glass tube device, which has had its gas removed, creating a vacuum space. It is comprised of electrodes that are designed to control electron flow between the electrodes sealed inside the vacuum tubes. Unlike transistors, these tubes can be easily replaced by the user.

How do vacuum tubes work?

Vacuum tubes utilise a principal called thermionic emission in which a metal is heated allowing the electrons to be loosened up. This causes the positively charged anodes to attract the negative electrons emitted by the cathodes by causing an electric current to flow into the anode and out of the cathode.

An advantage of vacuum tubes is that they have a wider dynamic range than transistors circuits. This is mainly attributed to their higher operating voltages and overload tolerances.

Types of vacuum tubes

There are a variety of vacuum tubes available such as;

  • Diodes - One of the simplest forms of vacuums tubes available. The tube comprised of two terminals that include both an anode and a cathode.
  • Triode - Triode vacuum tubes have electric current flow generates a high potential from the anode to the cathode's ground potential.
  • Tetrode - This type of vacuum tubes composition includes a fourth terminal that is also known as the screen that is between the anode and the grid. This screen is designed to reduce the capacitance emitted.
  • Pentode - This type of vacuum has a fifth electrode known as a suppressor that is designed to prevent the emission of electrons caused by stimulation of secondary electrons from the anodes.

Applications of Vacuum tubes

Vacuum tubes have a wide range of application in electronic type devices such as;

  • Resistance coupled voltage amplifiers
  • High-end audio equipment
  • Phase inverters

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Description Price Heater Current Heater Voltage Voltage Output Anode Power Base Type For Use With Mounting Type Pin Count Dimensions Body Length Diameter Maximum Operating Temperature Minimum Operating Temperature Overall Length
RS Stock No. 678-4114
BrandRS PRO
PHP522.90
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units
0.15 A, 0.3A 6.3V, 12.6 V 330V 1W B9A - - 9 22.5 (Dia.) x 57mm 50mm 22.5mm - - 57mm
RS Stock No. 171-1624
BrandRS PRO
PHP458.08
Each (In a Box of 100)
units
0.15 A, 0.3A 6.3V, 12.6 V 330V 1W B9A - - 9 22.5 (Dia.) x 57mm 50mm 22.5mm - - 57mm
RS Stock No. 678-4139
BrandRS PRO
PHP11,482.40
1 Set
Set(s)
1.6A 6.3V 800V 42W Octal - - 8 52 (Dia.) x 125mm 110mm 52mm - - 125mm
RS Stock No. 171-1621
BrandRS PRO
PHP544.636
Each (In a Box of 100)
units
0.15 A, 0.3A 6.3V, 12.6 V 300V 2.75W B9A - - 9 22.5 (Dia.) x 57mm 50mm 22.5mm - - 57mm
RS Stock No. 678-4105
BrandRS PRO
PHP599.14
Each
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0.15 A, 0.3A 6.3V, 12.6 V 300V 2.75W B9A - - 9 22.5 (Dia.) x 57mm 50mm 22.5mm - - 57mm
RS Stock No. 678-4108
BrandRS PRO
PHP799.65
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0.9A 6.3V 400V 23W Octal - - 8 38.5 (Dia.) x 115mm 98mm 38.5mm - - 115mm
RS Stock No. 171-1623
BrandRS PRO
PHP727.071
Each (In a Box of 50)
units
0.9A 6.3V 400V 23W Octal - - 8 38.5 (Dia.) x 115mm 98mm 38.5mm - - 115mm
RS Stock No. 678-4111
BrandRS PRO
PHP3,764.58
1 Set
Set(s)
1.5A 6.3V 800V 25W Octal - - 8 36.5 (Dia.) x 115mm 100mm 36.5mm - - 115mm
RS Stock No. 678-4117
BrandRS PRO
PHP914.90
1 Set(s)
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1.5A 6.3V 800V 25W Octal - - 8 36.5 (Dia.) x 115mm 100mm 36.5mm - - 115mm
RS Stock No. 146-0791
BrandRS PRO
PHP607.219
Each (In a Box of 100)
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0.76A 6.3V 500V 12W B9A - - 9 22 (Dia.) x 77.8mm 71.4mm 22mm - - 77.8mm
RS Stock No. 678-4120
BrandRS PRO
PHP687.55
Each
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0.76A 6.3V 500V 12W B9A - - 9 22 (Dia.) x 77.8mm 71.4mm 22mm - - 77.8mm
RS Stock No. 678-4127
BrandRS PRO
PHP1,953.28
1 Set
Set(s)
1.5A 6.3V 800V 25W Octal - - 8 36.5 (Dia.) x 115mm 100mm 36.5mm - - 115mm
RS Stock No. 678-4136
BrandRS PRO
PHP5,744.36
1 Set
Set(s)
1.6A 6.3V 800V 42W Octal - - 8 52 (Dia.) x 125mm 110mm 52mm - - 125mm
RS Stock No. 678-4098
BrandRS PRO
PHP131.81
Each (In a Pack of 2)
units
- - - - Octal KT88, 6CA7, 6P3P, 8-pin vacuum tubes such as EL34, 6550 - - - - - - - -
RS Stock No. 171-1620
BrandRS PRO
PHP544.636
Each (In a Box of 100)
units
0.15 A, 0.3A 6.3V, 12.6 V 300V 2.5W B9A - - 9 22.5 (Dia.) x 57mm 50mm 22.5mm - - 57mm
RS Stock No. 678-4101
BrandRS PRO
PHP599.14
Each
units
0.15 A, 0.3A 6.3V, 12.6 V 300V 2.5W B9A - - 9 22.5 (Dia.) x 57mm 50mm 22.5mm - - 57mm
RS Stock No. 678-4123
BrandRS PRO
PHP2,994.14
Each
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1.6A 6.3V 800V 42W Octal - - 8 52 (Dia.) x 125mm 110mm 52mm - - 125mm
RS Stock No. 678-4094
BrandRS PRO
PHP104.375
Each (In a Pack of 2)
units
- - - - B9A B329, B339, CV491, CV492, E88CC, ECC82, ECC83, 6DJ8, 6L13, 12AU7, 12AX7 - - - - - - - -
RS Stock No. 171-1625
BrandRS PRO
PHP2,714.79
Each (In a Box of 20)
units
1.6A 6.3V 800V 42W Octal - - 8 52 (Dia.) x 125mm 110mm 52mm - - 125mm
RS Stock No. 144-9016
Mfr. Part No.Nutube 6P1
PHP3,301.21
Each
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- - 80V - Parallel - Through Hole 17 45 x 16 x 5.6mm 45mm - +85 °C -40 °C 45mm