Tube recommendation for Audio Research LS-2b?

I have a ARC LS22 that I use sometime and use to use the LS2B. If you want a nice improvement and not spend big, try these. They work very nicely in the ARC gear.

http://www.tubemonger.com/Matsushita_Japan_6922_E88CC_Mullard_Tooling_NOS_p/591.htm

These are also very nice sounding in my ARC gear.
http://www.tubemonger.com/Tungsram_E88CC_6922_MINT_NOS_NOV_1973_HUNGARY_p/1108.htm

If you don't mind spending a little money.

http://www.tubemonger.com/Mullard_MPs_MINT_NOS_1967_MIL_7308_CV4109_E188CC_B_p/2000mb.htm

I also like the Amprex 7308's but they also are quite expensive now.

The Chinese 6DJ8 drew a bit more heater current then the standard Russian 6922 if my memory serves me. So a different value resistor was used for the Chinese tube. The Chinese tube was stock at the time that preamp was manufactured.

I switched my LS2B to a Mullard Gold Pin and it sounded great.

I had an LS 2b. Have a LS 5b as a backup pre

You really need warm tubes for the LS2

nos telefunkens,mullards and amperex from the sixties worked like a charm for me

I own also a ls22 and i measured that my EI ecc88 have a fillament
current togheter of 1.6A[incl.relay circuit].that is already to high for 1.5A max.LM317!For example a 7308 have more current than that.