4 X ECC40 PHILIPS-MINIWATT TUBE. SOLID GETTER. 1950s PROD. DP LCR. MATCHED QUAD. CB409

4 X ECC40 TUBE. PHILIPS-MINIWATT. MATCHED QUAD. NEW OLD STOCK IN ORIGINAL ROLL. 

BRANDS: PHILIPS-MINIWATT 

MATCHED QUAD 

RARE SOLID GETTER. 1950s PRODUCTION 

CODES: DP LCR 

TESTED IN ROEHRENTEST v9 COMPUTERIZED TUBE TESTER

104% /99%mA EMISSION (EM) 2.93/2.93 mA/V TRANSCONDUCTANCE (GM)

97/98% mA EMISSION (EM) 2.94/2.96 mA/V TRANSCONDUCTANCE (GM)

104/95% mA EMISSION (EM) 2.94/2.91 mA/V TRANSCONDUCTANCE (GM)

103/90% mA EMISSION (EM) 2.98/2.66 mA/V TRANSCONDUCTANCE (GM)