Tested Pair of 12AT7 ECC81 Mullard Rebranded for GE
Audio Receiver Preamplifier Vacuum Tubes
Made in Great Britain
Gray vented wing plates,
two spacers, glass seams, halo wire getter frames and top getter flashes
Mullard etch codes: Tk3
B6E3 and B6E1
Same construction /
configuration
Original cartons
Please see the photos
for more detail
Excellent strong
balanced NOS test results for Gm: 81 / 74 and 82 / 84
For Gm, 50
is the suggested minimum value
No shorts
detected
For
reference we use a calibrated Military TV-7 Tester
Additionally, the tubes were burned in on a THD audio
Tests include tone, noise, frequency response, microphonics and true application voltage
Estimated delivery within
the USA is from 3 to 7 business days
Our standard shipping is
US Postal 1st class
We combine shipping when
applicable
Please contact us with any questions