Can a tube short without blowing?
Loud pop, the left channel went silent. All tubes in the integrated amp remained lit and appeared to be normal. The left channel tube fuse had blown. Can a tube short and cause a fuse blow but without causing the tube to fail? It is probably just a bad fuse but I’ve never had a fuse fail without a cause after initial startup (e.g., first 20 hours). There are 125 hours on the Cary SLI-80HS integrated amp now.
‘Also, can a preamp section tube at EOL cause something like this? After the first 100 hours of run-in I replaced the 6922 tubes with a pair of beloved NOS tubes with many hours on them. They also remained lit throughout the event.
@txp1 Yes. Usually when you get a pop, its the tube arcing, often due to an internal short. But it might check just fine after that, or it might be dead or anywhere in between. Its a pretty good bet the tube will do it again so its usually best to replace it. |
