KT120 transformer failures


I know about the warning regarding the KT120 filament current draw posing a possible issue with some amps, but my question is: has anyone actually experienced this issue in a modern amp?
wolf_garcia
Hey Wolf_garcia
in all you talks with the folks at Jolida did you happen to get the specs on the Plate,Screen and Grid Bias voltages. I am looking into getting some kt120's custom matched at tctubes.com.
Nope...but you should feel free to call them and bet they'll give you the info you want. I merely described to them the "filament headroom" warnings that I kept noticing in the KT120 descriptions and they said there's plenty of transformer headroom built in. I've been using KT120s for a few weeks now and they sound great with no issues, although I have no idea what the "issues" might be (melting? radioactive waste?). I'm using 2 factory "matched" pairs...otherwise nothing special about them.
Wilson...I looked up "tctubes.com" and now I see why you asked, and I hope you find out and let me know. Although I will feel bad that MY tubes weren't as "custom matched"...damn!
Run the CL120 half power with 4 kt120 each mono block and you can have your kt120s.
Prices being equal. Would it be better to have tubes custom matched by TC Tubes or cryogenically treated by Cryoset? I saw both for about $200/quad. Factory platinum matched was about $25 less. I don't think either process would affect how the tubes work with the transformers of an amp.