EZ81 U709 UU12 CV5072 6CA4 RECTIFIER VALVE VARIOUS MANUFACTURERS

Manufacturers: Brimar , GEC Valves , Marconi , Mazda , Mullard , Osram

The EZ81 was introduced by Mullard as a high current B9A rectifier, the low power rectifier offered by Mullard was the 90 mA EZ80. Prior to the EZ81 Mullard designs used the GZ34.    in use the maximum reservoir capacitor would be limited to 50 µF and to prevent damage by excess current an effective series resistance of 230 Ohms is used.  The thin glass tube envelope is 19 mm in diameter and, excluding the B9A base pins, is 70 mm tall.    The EZ81 saw much use in classic hifi and classic guitar amplifier designed including such exotics as:-

Bogen DB230

Cary SLP90

Concert Fidelity Pre-amp

Marshall EL84 guitar amp

Reinhardt SVT-18 guitar amp

Wright Sound phono stage

 

 

 

Picture of NEW ORIGINAL MULLARD EZ81 OLD SHIELD BRITISH MADE
NEW ORIGINAL MULLARD EZ81 OLD SHIELD BRITISH MADE
Now these are truly beautiful devices, new old stock supplied in bulk box - we have one lot of these and once they have gone - that's it. Wherever else will you find a stash of new EZ81 at a keen price by one of the best names in the business - simply super. PRICED PER DEVICE INDIVIDUALLY BOXED.
Availability: 47 in stock
€62.74
Picture of NEW UNUSED EZ81 BY LA RADIOTECHNIQUE RFT OR EI
NEW UNUSED EZ81 BY LA RADIOTECHNIQUE RFT OR EI
Now these are a bit of an enigma because I don't know who has made them. They date from the 1970s and are from a small scale manufacturer of radiograms who went on to design and produce Amstrad's first transistor amplifier. The envelope carries white print and a coding FJ - a La Radiotechnique factory code. The B9A glass button carries a stamped number-letter code as per Siemens and RFT devices, however, the black anode and anode construction does not resemble Siemens or RFT devices. We think these may be Yugoslav EI devices. Whatever they are and whoever made them they are wonderful strong devices available at a very keen price for vintage high performance rectifiers - once they've gone thats it!
Availability: 39 in stock
Delivery date: 1 week
€14.26
Picture of MULLARD OLD SHIELD WHITE PRINT EZ81 BRITISH MADE
MULLARD OLD SHIELD WHITE PRINT EZ81 BRITISH MADE
On offer today is an EX EQUIPMENT MULLARD EZ81 B9A rectifier valvs, showing good emission when tested using our AVO VCM163 valve tester.
Stock Code: x12
Availability: 1 in stock
Delivery date: 1 week
€21.67
Picture of BRIMAR WHITE PRINT EZ81 BRITISH MADE
BRIMAR WHITE PRINT EZ81 BRITISH MADE
On offer today is an EX EQUIPMENT MULLARD EZ81 B9A rectifier valvs, showing good emission when tested using our AVO VCM163 valve tester.
Stock Code: X11
Availability: 1 in stock
Delivery date: 1 week
€18.25
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