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6C33C tubes - sonics, implementation & availability

Just looking for thoughts on the 6C33C tube and amplifiers using the 6C33C tubes. I know BAT, Lamm, Audio Mirror, Tube Guru, Wall Audio and others use this triode tube in differing topologies....some SET, some PSE and others push pull.  How does this tube compare with the 300B sonically?
Is there a preferred topology for this tube considering the higher current and from what I've read tube to tube variability/instability? I've also read these tubes are no longer in production but there are fairly large stockpiles, but many unreliable. Looking at the Wall Audio PSE M50 Monoblocks myself.  Thanks for all opinions!

normie57

Showing 1 response by steakster

steakster
1,974 posts
 
Excellent info here: "The 6C33C Survival Guide".  My 50w push/pull monoblocks use them.   No need for a space heater in the winter.   I’ve purchased many of these tubes from Russia via Ebay.   The sellers were always trustworthy.   Yet, some tubes were DOA.   I just purchased 50% more than I needed.

Here are photos of it being used in the guidance system of a Russian cruise missile.
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