Smoke when using Chatham 2399 / Tung Sol 5998

[sjeffrey]

I have stock crack the seems to be running fine with stock tubes.  I have tried rolling a Chatham 2399 and after a few minutes I get smoke.  The first time The Crack was closed so I couldn't tell where the smoke started from.  I put everything back to stock and Crack is fine.  2nd time I propped the plate up so I could see underneath.  It seems the smoke is from the power cord area.  Any ideas what could be the cause?  Is it a bad tube?

Thanks,
Steph

 

[Doc B]

Yes if it smokes when that tube is installed that tube is the problem. Stop putting it in there or you will damage the amp.

 

[sjeffrey]

Fair enough.  Just finished (and started) my build this weekend so I wasn't ready to call my amp "stable" yet.  Figured maybe this particular tube drew more current or something and might cause a bad solder joint to manifest itself.  Waiting for 2 more tubes to arrive.  Hopefully those 2 will work fine which would be further proof that the tube is bad.