How many rectifiers can have mesh plates?

[Kay Pirinha]

Also barely to believe. Due to it's high conductivity a copper WW resistor needs a large turns number to achieve some certain resistance. Hence there's a huge parasitic inductance with them. Maybe he just likes the sound of resonant circuits in the cathode lines?
Best regards!

 

[50AE]

He also technically measured it. I remember it made it out through the audio band. Self inductance was more problematic, leading to an increase of impedance at HF.

 

[Kay Pirinha]

Bingo! That's exactly the reason for different sound! The tubes' operational points vary with frequency. But who really wants this?

Best regards!

 

[euro21]

This is the reason why designers use only non-inductive (Ayrton-Perry) wirewound resistors in the cathode, even if blocked with capacitor.

 

[50AE]

Bingo! That's exactly the reason for different sound! The tubes' operational points vary with frequency. But who really wants this?

Best regards!

I was wrong,

The resistor author claims to have them wounded non inductive, in a bifilar anti phase way I believe. On his article cited by Rob, he claims it and describes measurements of a capacitive roll-off

hifi heroin: The worst resistor ever?

Not a pain when the cathode is bypassed, which is the case in Rob's schematic, by a 100uF

So there shouldn't be any resonances or phase shifts.

Best regards,
Alexander.