Sylvania 7025 12AX7 - long gray anodes, phono grade, 1960s production
Sylvania, 7025, 12AX7, long gray anodes, phono grade, 1960s production.
This 1960s Sylvania 7025 is a low noise 12AX7/ECC83valve type. It has long gray anodes with copper grid posts and a halo getter. The yellow print on the glass has the Sylvania logo.
As can be seen from the test data label, this valve as new. It has been screened for gas, heater-cathode leakage, shorts, and excessive noise and microphonics on each triode section. It was tested at typical operating voltages on our laboratory grade AVO VCM163