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12B4 / 12B4A

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12B4 / 12B4A GE - matched pair Price: Starting at $17.00 The GE 12B4A tubes in this matched pair have black plates and halo getters with lots of flashing. The white or red print on the glass may have smudges. Choose from precisely matched pairs that test as new or as good.	12B4 / 12B4A GE JAN - black plates, new in box Price: $13.00 This military spec GE 12B4A tube has black plates and a halo getter. The green print on the glass reads "JAN-12B4A." Tube tests as new and comes in its original box.	12B4 / 12B4A Raytheon - black plates, new in box Price: $9.50 This Raytheon 12B4A tube has black plates and a halo getter. Tube tests as new and comes in its original box.
12B4 / 12B4A RCA - black plates, new in box Price: $13.00 This RCA 12B4A tube has black plates and a halo getter. Tube tests as new and comes in its original box.	12B4 / 12B4A RCA - matched pair Price: $27.00 The RCA 12B4A tubes in this matched pair have black plates and halo getters. The print on the glass is missing (see photo). Both tubes test as new with very low noise. They are matched for both transconductance and current draw.	12B4 / 12B4A Sylvania - matched pair Price: $21.00 The Sylvania 12B4A tubes in this matched pair have black plates and halo getters with lots of flashing. The yellow print on the glass is nearly gone (see photo). Both tubes test at 80% for Gm with very low noise.
12B4 / 12B4A Tung-Sol - black plates, new in box Price: $11.00 This Tung-Sol 12B4A tube has black plates and a horseshoe getter. Tube tests as new and comes in its original box.	12B4 / 12B4A Westinghouse - black plates, new in box Price: $9.50 This Westinghouse 12B4A tube has black plates and a D getter. Tube tests as new and comes in its original box.


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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar players, DIY tube audio enthusiasts, and audiophiles.

We also offer high quality and hard to find parts for DIY tube amplifier projects.

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