6X4 CV493 CV4005 EZ90 U78 RECTIFIER VALVE VARIOUS MANUFACTURERS

miniature B7G based HT rectifier valve
Manufacturers: Osram , GEC Valves , Brimar , Sylvania

The 6X4 is a miniature HT rectifier following the normal pattern for a full wave device in that a common cathode is employed.

At 325-0-325 input to the rectifier this will give an HT rail higher than is required for most domestic receivers. Use for audio amplifiers and small transmitters is most probable, or driven at 250 volts for radio receivers. The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 59 mm tall.

These valves saw duty in many of the smaller classic hifi amplifiers and guitar amplifiers, however, here's a list of some exciting exotica that also uses them:-

Audio Note DAC 1.2

Eastern Electric
KONDO KSL M7 preamp
LAMM LP2 Deluxe Phono
Musical Surroundings
Sears Silvertone 1482 Guitar amp 1965-1966
Wright WPP200C
YS Audio Symphonies + preamp

 

 

 

 

Picture of GEC OSRAM U78 6X4 FROM MAY 1955
GEC OSRAM U78 6X4 FROM MAY 1955
On offer is an GEC 6X4/U78 rectifier dating from May 1955. It is unboxed and tests as 100% emission for each diode section within the envelope using our AVO VCM163.
Stock Code: MAY55
Availability: 1 in stock
Delivery date: 1 week
€29.66
Picture of BRIMAR 6x4 1970s MANUFACTURE
BRIMAR 6x4 1970s MANUFACTURE
On offer is an Sylvania USA 6X4 rectifier . It is unboxed and tests as 100% emission for each didoe section within the envelope using our AVO VCM163.
Stock Code: y31
Availability: 1 in stock
Delivery date: 1 week
€15.97
Picture of  BRIMAR 6X4 UK MANUFACTURE WHITE PRINT 1960s MANUFACTURE
BRIMAR 6X4 UK MANUFACTURE WHITE PRINT 1960s MANUFACTURE
On offer is an Brimar6X4/U78 rectifier dating from the 1960s. It is unboxed and tests as 100% emission for each diode section within the envelope using our AVO VCM163.
Stock Code: v13
Availability: 1 in stock
Delivery date: 1 week
€25.10
Picture of BRIMAR 6X4 UK MANUFACTURE WHITE PRINT 1960s MANUFACTURE
BRIMAR 6X4 UK MANUFACTURE WHITE PRINT 1960s MANUFACTURE
On offer is an Brimar6X4/U78 rectifier dating from the 1960s. It is unboxed and tests as 100% emission for each diode section within the envelope using our AVO VCM163.
Stock Code: C128
Availability: 1 in stock
Delivery date: 1 week
€25.10
Picture of BRIMAR 6X4 UK MANUFACTURE REDE PRINT 1960s MANUFACTURE
BRIMAR 6X4 UK MANUFACTURE REDE PRINT 1960s MANUFACTURE
On offer is an Brimar6X4/U78 rectifier dating from the 1960s. It is unboxed and tests as 100% emission for each diode section within the envelope using our AVO VCM163.
Stock Code: C129
Availability: 1 in stock
Delivery date: 1 week
€34.22
Picture of STC FOOTSCRAY CV4005 MILITARY SPEC 6X4 UK MANUFACTURE WHITE PRINT 1960s MANUFACTURE
STC FOOTSCRAY CV4005 MILITARY SPEC 6X4 UK MANUFACTURE WHITE PRINT 1960s MANUFACTURE
On offer is an STC CV4005 rectifier dating from the 1960s. It is unboxed and tests as 100% emission for each diode section within the envelope using our AVO VCM163.
Stock Code: v30
Availability: 1 in stock
Delivery date: 1 week
€25.10
Picture of BRIMAR 6X4 UK MANUFACTURE WHITE PRINT 1960s MANUFACTURE
BRIMAR 6X4 UK MANUFACTURE WHITE PRINT 1960s MANUFACTURE
On offer is an Brimar6X4/U78 rectifier dating from the 1960s. It is unboxed and tests as 100% emission for each diode section within the envelope using our AVO VCM163.
Stock Code: x5
Availability: 1 in stock
Delivery date: 1 week
€25.10
Picture of STC BRIMAR 6X4 UK MADE 1950's
STC BRIMAR 6X4 UK MADE 1950's
On offer is an STC Brimar 6X4/U78 rectifier dating from the 1960s. It is unboxed and tests as 100% emission for each diode section within the envelope using our AVO VCM163.
Stock Code: x8
Availability: 1 in stock
Delivery date: 1 week
€26.24
Picture of STC BRIMAR 6X4 UK MADE 1950's
STC BRIMAR 6X4 UK MADE 1950's
On offer today an STC Brimar 6X4 showing 100% emission for each diode section as tested using our AVO VCM163.
Stock Code: 827
Availability: 1 in stock
Delivery date: 1 week
€25.10
Picture of STC BRIMAR 6X4 UK MADE 1950's
STC BRIMAR 6X4 UK MADE 1950's
On offer is an Brimar 6X4/U78 rectifier dating from the 1960s. It is unboxed and tests as 100% emission for each diode section within the envelope using our AVO VCM163.
Stock Code: d6
Availability: 1 in stock
Delivery date: 1 week
€22.82
Picture of GE USA 6x4 1970s MANUFACTURE
GE USA 6x4 1970s MANUFACTURE
On offer is an GE USA 6X4 rectifier . It is unboxed and tests as 100% emission for each didoe section within the envelope using our AVO VCM163.
Stock Code: x2
Availability: 1 in stock
Delivery date: 1 week
€10.27
Picture of TUNG-SOL USA 6x4 1960s MANUFACTURE
TUNG-SOL USA 6x4 1960s MANUFACTURE
On offer is a Tung-Sol USA 6X4 rectifier . It is unboxed and tests as 100% emission for each didoe section within the envelope using our AVO VCM163.
Stock Code: v12
Availability: 1 in stock
Delivery date: 1 week
€20.53
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