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For sale is aclose matched pair of ADZAM EF86 / 6267 vacuum tubes.
Both tubes areNOS / New Old Stockand come with their original ADZAM boxes. The boxes show age, storage wear and some edge wear, as visible in the photos.
The tubes were tested forplate current and transconductance. Both tubes test strong and are closely matched.
Test Conditions
- Va:250 V
- Vg2:140 V
- Vg1:-2.2 V
- Spec Ia:3.0 mA
- Spec GM:2200 µmhos
Test ResultsTubeIaGMGM %Tube 13.9 mA2400 µmhos109%Tube 23.8 mA2600 µmhos118%
Strong close matched pair. Plate current is very closely matched, and both tubes test well above reference GM.
Condition
- NOS / New Old Stock
- Original ADZAM boxes included
- Tested strong
- Close matched pair
- EF86 / 6267 type
- Original print partly worn, see photos
- Boxes show normal vintage storage wear
- Electrical test only; noise/microphonics not specifically tested unless stated
Photos are part of the description. You will receive the exact tubes shown.
Item specifics
Brand:ADZAM
Type:Vacuum Tube
Model:EF86 / 6267
Quantity:2 tubes
Condition:NOS / New Old Stock
Tested:Yes
Matched Pair:Yes
Tested For:Plate current and transconductance
Use:Audio, microphone preamp, amplifier, radio and vintage electronics where EF86 / 6267 is specified
Country/Region of Manufacture:Europe / Philips-group production
