Which of these tubes should I purchase for my BAT amp? 6C33C-B or 6C33C/6S33S?


    Has any one bought the Ulyanovsk factory 6S33S/6C33C.  They sell for a lot less than the Sovtek 6C33C-B.  Are the 6S33S/6C33C the same as the 6C33C-B?
yenkochris
The 6C33C-B and the 6C33S-V is the exact same tube. Different translations of Russian. Check out this page and that page. The 6C18C is an older equivalent - not as good. Many factories made the 6C33C-B tube back in the day.

I’m pretty sure that I purchased the ones from the Ulyanovsk factory. Bought them from Russian and Ukraine sellers with 100% positive feedback. Never had a problem. Allow 6-8 weeks for standard economy delivery.

As with many Ebay sellers, different prices for the exact same item. I paid around $20/tube plus shipping. It appears that the prices have skyrocketed then.

Visit this site for more in-depth info. Interesting photos of the tube in the guidance system of a Russian cruise missile. Unfortunately, it was aimed at us.
Thanks for your input.  One of the Russian e-bayers has a quad set for $99 and free shipping.  He has 100% feedback (has many satisfied 6C33C custormers) with 14 day return and the tubes are from the Ulyanovsk factory.
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