Used Telefunken ECC86, with clearly visible markings , tested
good
! Somewhat special double triode used in late 50's car radios, hence the specified (very low! 6,3 V) anode voltage !
We use following grades when testing our tubes:
+ GOOD: Good or above electrical specs
= OK: OK or just within electrical specs
- WEAK: Barely within electrical specs
We test our tubes with a tube tester on electrical specifications, internal leakage and electrical shorts.
Tubes that are way out of spec (with or without slight leakage) might be sold by us very cheaply as packs of 10 for fun or crazy experimenting! Tubes with internal shorts will not be sold by us, they go straight into the bin!
