Products tagged with 'U52'

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5U4G U52 52KU CV575 CV1071 CV1575 GZ31 VU71 VALVE RECTIFIER VARIOUS MANUFACTURERS

octal based biphasic directly heated HT rectifier valve
From £16.00

MARCONI OSRAM 5U4G MILITARY U52 BROWN BASE 1955 PRODUCTION

Here we have a single 5U4G, a military specification U52 DIRECTLY HEATED TAPE FILAMENT rectifier manufactured by Marconi Osram at their Hammersmith Brook Green factory which carries both white inked print and the etched elliptical wartime cartouche. This valve shows excellent bright getter and has the inverted getter pan situated down by the glass pinch, 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 brown low loss micanol base - simply super. The pobverse of the vale carries a large MArconi blue and white decal. 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.
£200.00

MARCONI OSRAM CV1071 MILITARY U52 BROWN BASE 1955 PRODUCTION

Here we have a single CV1071, a military specification U52 DIRECTLY HEATED TAPE FILAMENT rectifier manufactured by Marconi Osram at their Hammersmith Brook Green factory and carrying the cartouche code for August 1955. 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 brown low loss micanol base - simply super. The pobverse of the vale carries a large MArconi blue and white decal. 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.
£200.00

OSRAM 10E/373 RAF AIR MINISTRY U52 BLACK BASE WARTIME PRODUCTION

Here we have a single 10E/373 an Air Ministry military specification U52 DIRECTLY HEATED TAPE FILAMENT rectifier manufactured by Osram at their Hammersmith Brook Green factory sometime during the war years. This valve shows excellent bright getter and has the inverted getter pan situated down by the glass pinch, however, more importantly it tests as EXCELLENT using my Avo VCM163 valve tester. The valve is fitted with the Air Ministry trademark shrink ccollar encircling the envelope and base which was a palliative measure to prevent separation in hiogh altitude applications. 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.
£195.00

OSRAM 10E/373 RAF AIR MINISTRY U52 BLACK BASE WARTIME PRODUCTION

Here we have a single 10E/373 an AIr Ministry military specification U52 DIRECTLY HEATED TAPE FILAMENT rectifier manufactured by Osram at their Hammersmith Brook Green factory sometime during the war years. This valve shows excellent bright getter and has the inverted getter pan situated down by the glass pinch, 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.
£195.00

OSRAM CV575 MILITARY U52 BLACK BASE 1953 PRODUCTION

Here we have a single U52 DIRECTLY HEATED TAPE FILAMENT rectifier manufactured by Osram at their Hammersmith UK factory and carrying the cartouche code for March 1953 This valve shows excellent bright getter and has the inverted getter pansituated 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.
£195.00