CV575 OSRAM MILITARY U52 BLACK BASE 1953 PRODUCTION
OSRAM, CV575, MILITARY, U52, BLACK BASE ,1953 PRODUCTION
Here we have a single CV575, a military specification U52 DIRECTLY HEATED TAPE FILAMENT rectifier manufactured by Osram at their Hammersmith Brook Green factory and carrying the cartouche code for March 1953
This valve shows excellent bright getter and has the inverted getter pan situated down by the glass pinch, the valve base is very slightly loose on the envelope, however, more importantly it tests as EXCELLENT using my Avo VCM163 valve tester. This exquisite device carries good white print, the classic U52 envelope shape and the trademark rounded black low loss micanol base - simply super.
Device test data: Ia = 120.0mA for both diode sections.
Device specification 120mA delivery for both diode sections. So you can see we have 100% emission from this venerable beauty.