ideas for diy tube adapters?

[Dana-L]

Also, while I understand the many comments about the tubes not performing at their best unless they are in a circuit designed specifically for them, I am by no means a purist and really enjoy playing around.

Me, too.

A few years ago I scored a couple thousand used tubes on eBay and I've taken great joy in experimenting with "forbidden" substitutions. For example, I know from personal experience that subbing a 35CW5 for a 6BQ5 in my modded VJ sounds great and exhibits no reliability issues that I've seen. I'm sure it's not working in it's optimal range but it's good enough for rock & roll, baby!

Have fun!

-Dana

[dotfret]

And there's no 7-pin dual triodes.

There's the ECC91, and the Russian 6n15p (which is very similar).

Perhaps you meant that there's no interesting 7-pin dual triodes?

[krx]

And there's no 7-pin dual triodes.

There's the ECC91, and the Russian 6n15p (which is very similar).

Perhaps you meant that there's no interesting 7-pin dual triodes?

Righto. I wouldn't really call a common-cathode tube a true dual-triode.

[Shottky]

However 12AT7s can generate some unpleasantly muddy sounding high-odd harmonics when overdriven (as I discovered), which hopefully 6SL7s wouldn't.

I keep hearing about this, but I haven't actually *heard* it yet. If I were to design a proper Long-tailed PI with a 12AT7 in the 18W, would it be prone to producing these harmonics? Or would it require a higher-gain pre-amp?