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Which DHT tube, mu>30 driver duty

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I use 841 tubes (mu=30).

This (thoriated tungsten cathode) tube is super, but a little expensive... but it is relative considering EML prices. :)

It like high (400-500V) anode voltage and hate low (below 250k) loading.
It is proper VAS driving with 10Y cathode follower my 801a PSE.
 
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Well, 2C22 is an honorary DHT in my opinion.

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Funny you say this - I only use DHTs and if I had to use an indirectly heated equivalent it would be the 2C22. I kept a few just in case.

There's always the 3a5. Gain of 15 if that helps. Not a bad tube. Not a 4P1L, a 10Y, a 26 or an 01A, but still as good or better than a lot of indirectly heated tubes. Possibly the 1J6, though you have to buy a lot to get a few with well matched sections if you want to use them as diff pairs. .

DHTs just have some kind of extra vividness and vitality. It's like a drug - you can't do without it once you've experienced it.
 
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