rare Mullard ECC83 mC1 long plate 1956 vacuum tubes valves test NOS Matched Pair

GBP 389.20
Condition: Used
Category: Appliances
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Matched Pair of rare 1956 Mullard mC1 long plate ECC83 vacuum tubes / valves

excellent condition - test above NewOldStock values on my AVO mk4 valve tester

                                    
                                                    la             Gm                                                   la             Gm
     test results valve 1:          1.70 mA  / 2.0 mA/V          test results valve 2:    1.50 mA  / 2.0 mA/V
                                              1.70 mA  / 2.0 mA/V                                             1.55 mA  / 1.9 mA/V


                 book values are    1.20mA  / 1.6mA/V
 

the tubes have also been tested in my Woodside preamp, sounding sublime


please note that although the valves have Tungsram labels on them the factory date codes are both B6K

       B6K indicates Blackburn Mullard factory Oct 1956

and the construction of these valves' getters are unique to Mullard mC1 ECC83 type valves




Incidently it is the copper anode rods that give the Mullards that warmer English sound, still detailed though, with a great soundstage
.


Please note - I usually re-list my listings every 2 weeks. Sometimes when the listing ends ebay shows it as no longer available, so it is worth checking if I have just re-listed it..
Brand Mullard
Type Vacuum Tube
Unit Type Unit
Year 1956
Tube Type mC1
Model ECC83
Manufacturer Warranty None
MPN 12AX7
Unit Quantity 2
Plate Type long plate