Tube DIY Asylum

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I'm a fan of AZ1/AZ11 mesh

Posted by andy evans on September 21, 2017 at 00:20:00:
I'm a fan of AZ1/AZ11 mesh, and I use two in parallel for my PSE 4P!L amp. You only need one for a preamp. Mesh is audibly better - to me - than the solid plates. Usually you can find some from Germany and the rest of Europe. I prefer the AZ12 base - the AZ1 base is a bit clingy and can loosen tube bases. The AZ1 P sockets are easier to find than the Y10A sockets which now only seem to come from China.
Other than that I like 80 or 5Y3GT and I like 5R4GY. I prefer directly heated rectifiers but find the 5U4G types and their brethren sound a little flat. The 5R4GY drops a lot of volts and takes a 4uF first cap, but to me it has more life in the sound. In 6.3v the 6BY5G is also nice. But mesh is king.
It gets harder to hear the differences in rectifiers the more you pile on the chokes, and if you use Ale Moglia's gyrator. But I would still choose one of the above for projects having played around with a few options.