You can't easily direct-couple the first two stages. In theory, you could RC couple them, then direct couple to the White cathode follower. If I needed that much gain, I'd be more likely to skip the Aikido topology completely and use a high mu tube as a common-cathode voltage amplifier. That would then couple to a cathode follower (or White cathode follower). Much lower parts count this way.
I'm with SY on this one,but you should provide some more detail such as required signal levels, noise performance, output Z and the like.
Low level stuff could be handled quite effectively by just a single triode connected D3A for example, which if really low output impedance (below a couple of K ohms) is required could be handled by a white CF or even a plain and simple CF direct coupled to the plate of the D3A.
Low level stuff could be handled quite effectively by just a single triode connected D3A for example, which if really low output impedance (below a couple of K ohms) is required could be handled by a white CF or even a plain and simple CF direct coupled to the plate of the D3A.
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