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


octal based biphasic directly heated HT rectifier valve
Manufacturers: Brimar , Osram , Cossor , STC , GEC Valves , RCA
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The U52 is directly heated full wave rectifier with a rating of 500 Volts on the anodes. The U52 has a maximum reservoir capacitor rating of 16 µF and a minimum series resistance of 180 Ohms, capable of delivering 100 Watts of DC power.    It would be used for all types of medium power equipment. . 

The 5U4G has ribbon filaments coated with oxide with the top of the filament extends beyond the top mica, their directly heated design and generous power rating means sag free HT+ is available instantaneously and with bags of reserve any application - even audio - could desire..

Their appearance is typified by the fat balluster shaped envelope and shaped micanol base ala KT66.

The classic envelope is 48 mm in diameter, and excluding the IO base pins, is 113 mm tall. Type U52 was first introduced in 1938.

As you can see, there are many variants of the U52 type but the GEC-Osram product is the most desired and well regarded both from an aesthetic and performance perspective.

 



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Picture of RCA ST SHAPE 5U4G RECTIFIER SMOOTH CHARCOAL ANODE
RCA ST SHAPE 5U4G RECTIFIER SMOOTH CHARCOAL ANODE

This  RCA tall form ST envelope 5U4G valve shows excellent bright getter and tests as EXCELLENT using my Avo VCM163 valve tester. 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. 

Availability: Out of stock

£45.00 (GBP)
Picture of KEN-RAD VT-244 JAN 5U4G 5 RIB CHARCOAL ANODE
KEN-RAD VT-244 JAN 5U4G 5 RIB CHARCOAL ANODE

This beautiful Joint-Army-NAvy ex military device is ex equipment but gives a full emission test on our AVO VCM163. It has the scarce 5 ridged charcoal anode electrode cage and is a very very nice valve indeed - scarcely offeredd, keenly sought, well, here's one on offer today! 

Availability: 1 in stock

£65.00 (GBP)
Picture of RCA SHORT FORM 5U4G 4 RIB ANODE RECTIFIER
RCA SHORT FORM 5U4G 4 RIB ANODE RECTIFIER

This RCA short form 5U4G valve shows excellent bright getter and tests as EXCELLENT using my Avo VCM163 valve tester. 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. 


£17.50 (GBP)
Picture of GE OWENSBOROUGH SHORT FORM 5U4GB
GE OWENSBOROUGH SHORT FORM 5U4GB

This GE short form 5U4G valve shows excellent bright getter and tests as EXCELLENT using my Avo VCM163 valve tester. 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.
 

Availability: 1 in stock

£15.00 (GBP)
Picture of TUNG-SOL VT-244 5U4G SC545A FIVE RIB ANODE JAN PRODUCED RECTIFIER
TUNG-SOL VT-244 5U4G SC545A FIVE RIB ANODE JAN PRODUCED RECTIFIER

This beautiful Joint-Army-Navy ex military device is ex equipment but gives a full emission test on our AVO VCM163.  It has the scarce 5 ridged charcoal anode electrode cage  and is a very very nice valve indeed - scarcely offered, keenly sought, well, here's one on offer today! 

Availability: 1 in stock

£65.00 (GBP)
Picture of TUNG-SOL 5 RIBBED CHARCOAL ANODE 5U4G YELLOW PRINT
TUNG-SOL 5 RIBBED CHARCOAL ANODE 5U4G YELLOW PRINT

 This is a rather special device, It's a 5 ribbed charcoal anode Tung-Sol 5U4G, manufactured during the 1940s

The envelope is tight to the black low loss base which is beautifully marked in YELLOW print and the device tests as EXCELLENT using my Avo VCM163 valve tester. 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 and scarce beauty

Availability: 1 in stock

£65.00 (GBP)