GE 12BH7A - gray plates, halo getter

The GE 12BH7A tubes in this precisely matched pair have halo getters and gray plates with copper grid posts. The white print on the glass has the GE logo. Both tubes test as new and are matched for both current draw (mA) and Gm.

This 1960s RCA 12BH7A tube has gray plates and a halo getter. The red print on the glass has the RCA logo (label may be partial). Tube tests as new with balanced sections and low noise.