Which tube in PI of 5150III 50W head?

[Speeddemon]

Guys, I hear a lot of recommendations for a Sovtek 12AX7LPS in the PI spot, but also some for a JJ ECC803S (not the ECC83S!).

Any recommendations and what to expect soundwise in difference?

I do have a few spare tubes; Amperex 12AT7 (vintage), RFT 12AX73 (NOS, '78), some modern JJ's and a few Sovteks.

 

[hammered]

I put a Sovtek LPS in the PI when I had my 50 watt , I couldn't hear any differed in tone

 

[DADA]

Just buy that Sovtek LPS. I did not change the PI but Poetin it in V2 and a Ruby 12AX7AC5 HG+ in V1.
More warm and less shrill sounding. Especially ch3. To me it is a keeper.

This got me inspired: viewtopic.php?f=3&t=124599&hilit=5150

 

[Speeddemon]

Thanks.

any more suggestions?