Question for Amperex tube experts.....
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dragon1952
Posts: 4,940
This is in regard to all Holland made tubes with the 'delta' prefix. Specifically the 12AU7 and 12AX7's. I know they had the Bugle Boy logo and the orange globe logo and some with just orange print, some relabeled for other companies, etc. But many of them appear to be identical construction. So say you had one Bugle Boy and needed a quad. This one happens to have the shorter plates (15mm?) and the small halo getter. Would it be correct to say that you could get any combination of logo'ed tubes to make a quad assuming they all appeared identical and were from the same factory and general time frame, i.e. early to mid sixties?
2 channel - Willsenton R8 tube integrated, Holo Audio Spring 3 KTE DAC, audio optimized NUC7i5, Windows 10 Pro/JRiver MC29/Fidelizer Plus 8.7 w/LPS and external SSD drive, PS Audio PerfectWave P3 regenerator, KEF R3 speakers, Rythmik F12SE subwoofer, Audioquest Diamond USB cable, Gabriel Gold IC's, Morrow Audio SP5 speaker cables. Computer - Windows 10/JRiver, Schiit Magni 3+/Modi 3+, Fostex PMO.4n monitors, Sennheiser HD600 headphones