Tubes - Transmitting, Audio, Misc.
Please choose from the following TUBES Sub-Catagory choices:
572B![]() |
811A![]() |
6146![]() |
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4CX350 Series![]() |
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SOCKETS![]() |
CHIMNEYS![]() |
PLATE CAPS![]() |
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BOOKS![]() |
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PARASITIC SUPPRESSOR![]() |

CK5963 Raytheon Gray Plate Medium Mu Twin Triode Tube (NOS/NIB)
In Stock
Designed primarily for use as a frequency divider in electronic computers as well as other On/Off control circuits.
New Old Stock * New In Box * No longer available for export.
MFR: Raytheon
SKU: CK5963-GP-RAY

5963 Sylvania Medium Mu Twin Triode Tube (NOS/NIB)
In Stock
Designed primarily for use as a frequency divider in electronic computers as well as other On/Off control circuits.
New Old Stock * New In Box * No longer available for export.
MFR: General Electric Company
SKU: 5963-SYL

5963 Sylvania Medium Mu Twin Triode Tube Green Label (NOS/NIB)
In Stock
Designed primarily for use as a frequency divider in electronic computers as well as other On/Off control circuits.
New Old Stock * New In Box * No longer available for export.
MFR: Sylvania
SKU: 5963-GRN-SYL

5963 Sylvania Vintage Medium Mu Twin Triode Gold Label (NOS/NIB)
In Stock
Designed primarily for use as a frequency divider in electronic computers as well as other On/Off control circuits.
- Gold Label Manufactured 1958 &1960
New Old Stock * New In Box * No longer available for export.
MFR: Sylvania
SKU: 5963-GOLD-SYL

5963 Westinghouse Medium Mu Twin Triode Tube (NOS/NIB)
In Stock
Designed primarily for use as a frequency divider in electronic computers as well as other On/Off control circuits.
New Old Stock * New In Box * No longer available for export.
MFR: Westinghouse
SKU: 5963-WH

5963-CHS-USN Sylvania Medium Mu Twin Triode Tube (NOS/NIB)
In Stock
Designed primarily for use as a frequency divider in electronic computers as well as other On/Off control circuits.
New Old Stock * New In Box * No longer available for export
MFR: General Electric Company
SKU: 5963-CHS-USN-SYL

GL5963 General Electric Black Plate Medium Mu Twin Triode (NOS/NIB)
In Stock
Designed primarily for use as a frequency divider in electronic computers as well as other On/Off control circuits.
New old stock * New In Box * No longer available for export
MFR: General Electric Company
SKU: GL5963-BP-GE

5963 RCA Black Plate Medium Mu Twin Triode (NOS/NIB)
In Stock
Designed primarily for use as a frequency divider in electronic computers as well as other On/Off control circuits.
New old stock * New In Box * No longer available for export.
MFR: RCA
SKU: 5963-BP-RCA

12AU7A RCA Medium-Mu Twin Triode (NOS/NIB)
In Stock
- For applications critical as to microphonics
New Old Stock * No longer available for export
MFR: RCA
SKU: 12AU7A-RCA
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12AU7A / ECC82 General Electric Medium Mu Twin Triode (NOS)
In Stock
The 12AU7A is intended for service in radio and television receivers or in Audio amplifiers. The 12AU7A exhibits a lower microphonic output than the 12AU7.
New Old Stock * No longer available for export
MFR: General Electric Company
SKU: 12AU7A-ECC82-GE