The factories were owned by Philips. They were the parent company and manufactured Philips tubes, Miniwatt, Amperex, Radiotechnique, Valvo, and Mullard UK.
And a tall bottle tube does not mean it has superior sonics. Short bottle tubes can have either short plates or long plates, O-getters or D-getters. The tooling inside the bottle dictates the sonics.
The Amperex 7316 PQ Foil-getter (short bottle) is their premium industrial tube and currently costs about $300 per tube.
https://www.usaudiomart.com/details/649354167-rare-d-getter-7316-amperex-tube-highest-quaility-ulima...
I agree the Miniwatt PQ/SQ is a best buy. It may be the best of the Miniwatts and 12AU7 Bugle Boys.
And a tall bottle tube does not mean it has superior sonics. Short bottle tubes can have either short plates or long plates, O-getters or D-getters. The tooling inside the bottle dictates the sonics.
The Amperex 7316 PQ Foil-getter (short bottle) is their premium industrial tube and currently costs about $300 per tube.
https://www.usaudiomart.com/details/649354167-rare-d-getter-7316-amperex-tube-highest-quaility-ulima...
I agree the Miniwatt PQ/SQ is a best buy. It may be the best of the Miniwatts and 12AU7 Bugle Boys.