6N5S / 6N13S / 6AS7G / 6H5C SVETLANA 1950s! NEW NOS TUBE / VALVE. 6N5S (6Н5С) 100% New Item In Original Box. NOS 6H5C- 6AS7G Russian. Amplifier Tube Amplitrex Tested. Tested on Amplitrex AT1000 Advance Digital Tube Tester.
6N5S / 6N13S / 6AS7G / 6H5C SVETLANA 1950s! NEW NOS TUBE / VALVE. 6N5S (6Н5С) 100% New Item In Original Box. NOS 6H5C- 6AS7G Russian. Amplifier Tube Amplitrex Tested. Tested on Amplitrex AT1000 Advance Digital Tube Tester.