6N-6Z

Designed to function as a dampening diode in a television receiver direct drive sweep circuits.
MFR: RCA
SKU: 6V3
New old stock * No longer available for export.

6U5 Arcturus Cathode Ray Tuning Indicator (Pull)

Used * No longer available for export
MFR: Arcturus
SKU: 6U5-ARC-P

Designed for use as a biased detector or high-gain amplifier.

New old stock * No longer available for export
MFR: General Electric
SKU: 6SJ7

NOTE: Picture for reference only. 

Designed for use as a high-gain radio-frequency or intermediate-frequency amplifier in a radio receiver.
MFR: GE, RCA, Sylvania
SKU: 6SK7
New old stock * No longer available for export.

Designed for use as a combined detector, amplifier, and automatic-volume-control tube in radio receivers.
Manufactures RCA, Tung-Sol, GE, Raytheon, Sylvania,Philco, Westinghouse
SKU: 6SQ7
New old stock * No longer available for export.

Designed to be used as combined detector, amplifier and avc tube in radio receivers.

New old stock * No longer available for export.
MFR: Sylvania
SKU: 6SR7

Designed to be used in AVC and IF amplifiers.
MFR: RCA, GE, Tung-Sol
SKU: 6SS7
New old stock * No longer available for export.

MFR: Zenith, GE
SKU: 6U10
New old stock * No longer available for export.

Designed to function as an audio output amplifier and FM detector in TV amplifiers
MFR: Westinghouse, GE, Sylvania, RCA
SKU: 6T10
New old stock * No longer available for export.