Receiving Tubes

Designed to function as a gated amplifier in a color TV receiver. In such service it acts as a sync separator or sync clipper.
MFR: Sylvania
SKU: 12CS6
New old stock * No longer available for export.

Designed for use as a detector and intermediate-frequency or audio-frequency amplifier.
MFR: RCA
SKU: 12SF7
New old stock * No longer available for export.

Designed for use as a combined detector, audio amplifier and automatic volume control tube.
MFR: RCA, Sylvania
SKU: 12SR7
New old stock * No longer available for export.

Designed to operate as a diode detector, avc rectifier and as a audio amplifier in AC, AC-DC, and DC circuits.
MFR: RCA, GE
SKU: 12SW7
New old stock * No longer available for export.

Designed to operate as a converter in AC/DC amplifiers.
MFR: RCA
SKU: 12SY7
New old stock * No longer available for export.

A substitute for the 12AX7
New old stock / New in box * No longer available for export
MFR: GE
SKU: 12BYZA-GE

A substitute for the 12AX7
New old stock / New in box * No longer available for export
MFR: Raytheon
SKU: 12BYZA-RAY

Triple Mica, Black Plate, and a round Halo Getter. Used in audio amplifiers.
MFR: Arcturus
SKU: 12AY7
New Old Stock * No longer available for export

Two Mica, Grey Plate, and a round Halo Getter. Used in audio amplifiers.
MFR: Tung Sol
SKU: 12AY7
New Old Stock * No longer available for export