6A-6D

General purpose triode designed for service as an oscillator, detector, or amplifier.
MFR: RCA, Ken-Rad
SKU: 6C5
New old stock 

New old stock * No longer available for export
MFR: RCA, Sylvania, General Electric
SKU: 6C4

NOTE:  See 6135 for premium upgrade (5 Star)

The 6C10 contains three high-mu triodes with separate pin connections for all three cathodes, grids, and plates in a compact T-9 glass envelope with the novel 12 pin base.

New Old Stock * New In Box * No longer available for export
MFR; Raytheon, RCA, General Electric, Zenith
SKU: 6C10-NOS

Designed to be used in VHF amplifier cascode operation.
MFR: Sylvania, GE, Philco, CBS, Emerson
SKU: 6BZ8
New old stock * No longer available for export

Designed to be used as an automatic gain controlled IF Amplifier in 300 MA series heater operated Television receivers.

New old stock * No longer available for export.
MFR:Westinghouse, RCA, Sylvania, Magnavox
SKU: 6BZ6

6bz3 Tube Half Wave High Vacuum Rectifier

Designed to be used in equipment having series heater string arrangement.
MFR: Raytheon, RCA, Philco, Sylvania, GE
SKU: 6BY8
New old stock * No longer available for export.

Used as a wide-band amplifier in RF equipment.
MFR: Amperex, Italy
SKU: 6BY7
New old stock * No longer available for export.

Used in audio amplifiers
MFR: Unknown
SKU: 6BQ5-UN
New Old Stock * No longer available for export
NOTE: Picture for reference only.