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Philips 7316 Matched Pair (12AU7) Beckman Instruments special grade tube (ultra rare!)
NOS in a white box. Ultra-rare low noise 12AU7 tubes. These are super low noise tubes with medical-grade/aircraft equipment grade and were only sold to companies. These are the large halo getter 1959 date-coded originals from Holland. These 7136 tubes are among the rarest ever by Philips from the Heerlen factory. These tubes were the Philips answer to the Telefunken ECC802s and the Mullard 10M series.
First series Ct1 of the new Large-halo getter construction that came after the famous D-getter variant. Printed with white Beckman label.
TO ORDER:
please check the test reports in the picture list on the left,
pick your two tube numbers, and mention these in the command section on the order form.
Still available: 1, 4, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17
- Date code
- Ct1 ∆9E
- Factory
- Heerlen, Holland
- Year of Manufacturing
- 1959
- Generation
- 1st
- General availability
- Extremely Rare
- Condition
- New old stock (NOS)
- Label markings
- Good (some little scratches)
- Getter
- Large Halo getter
- Match for pair
- within 5% Match
- Tested with
- Amplitrex AT-1000
- test method
- auto bias
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