best valves where -- pre or power amp?

[eksiil]

hello,

is there anything approximating a rule of thumb on this? I've been revalving my Crofts & the question rears it head.

cheers

ahto

[Haselsh1]

From my own personal experience of using Gold Lion valves, the biggest impact sound wise was from upgrading the preamp valves.

[Jimbo]

Phono stage in pre.

[The Black Adder]

Which model Croft kit do you have?

If it's the new type using ECC82/83 then it has to be NOS Mullards IMO. Job done.

[Spectral Morn]

From my own personal experience of using Gold Lion valves, the biggest impact sound wise was from upgrading the preamp valves.

Agreed

[eksiil]

many thanks for the comments.

I have a Mega Micro II thoroughly upgraded by Glenn Croft late last year & the 7R monos. both take 12BH7A & ECC83 valves. in terms of 12BH7A-s, I have a pair of Philips ECG JANs & a pair of Tung-Sol black plates. the ECC83-s are Philips Miniwatts vs Brimar CV4004s. I can obviously experiment, the question was designed to establish if there were obvious shortcuts.

I've tried a few Mullards, remain underimpressed. these would be ECC83-s, can't afford the 12BH7A-s.