Tung-Sol 6SL7GT - VT-229 - military "JAN" designation -...

Tung Sol 6SL7GT, VT-229, "JAN" designation, matched pair. Military issue and wartime manufacture. Black, round plates; full, round mica. Tested on a calibrated Hickock TV-3. Firm bases and excellent silvering. Matched for dynamic gain and structure at 1875-1750 & 1750-1750 (1100 micromh...

Tung Sol 6SL7GT, VT-229, "JAN" designation, matched pair. Military issue an...