ONE (1) RE-TESTED With a Calibrated(07/24/2023) TV7D/U
August 1958 MULLARD BLACKBURN Etched 'B8H' 
for 'The Fisher Radio Corp.' Brand
 EZ81 6CA4 Vacuum Tube
with Square Boxed Getter with Seemed Top Glass.
Excellent silk screen White ink. 
Ships in new Mullard box as shown in pics.

TV7D/U Testing : No Shorts, No Leakage, No Gas, No Micro-phonics apparent
Minimum good on the TV7D/U scale is 40/40. Where a Vintage Factory new
Mullard EZ81 will test 60/60 (60 on each plate of the Full Wave Rectifier 2xplates)

TV7 Settings :
EZ81/6CA4     6.3v EV0-7030 Bias=0  Shunt=59   Switch= A   Press Button=7   Min Good=40 Plate #1.
EZ81/6CA4     6.3v EV0-1030 0 59 A 7 40 Plate #2.



Tube 1:  Etched Code 'B8C' March 1958 - Mullard branded Amperex
'Bugle Boy' - "Made in England"
  Test Results : Plate/Side 1 :  56.4 / Plate Side 2: 57.5


Notes: This tube tested with balanced plates at 2% match,
 and 94.0% / 95.8% of average Vintage Mullard factory new 
(=60/60) for a EZ81/6CA4 tube.



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