FOR SALE:  4 X 4П1Л / 4P1L TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRANDS: 1959-61 SVETLANA RUSSIAN (USSR) PRODUCTION
TESTED IN ROEHRENTEST TUBE TESTER80% 27.89mA EMISSION (EM) 5.29mA/V TRANSCONDUCTANCE (GM)90% 31.59mA EMISSION (EM) 5.75mA/V TRANSCONDUCTANCE (GM)85% 29.76mA EMISSION (EM) 5.28mA/V TRANSCONDUCTANCE (GM)126% 44.04mA EMISSION (EM) 6mA/V TRANSCONDUCTANCE (GM)