2. amps-preamps
  3. 1093700890

Noise when turning on/off tube amp?

I have an integrated tube amp, Cary SLI 80. For the three years I have had it, there has never been any kind of hum or noise. Now there is a 1 second white noise type reaction 15 seconds after I turn it on, and again 15 seconds after I turn it off. Is this a sign that I need to replace tubes? If so, which set of tubes should I be looking at? Calling on all tube experts! Thanks in advance for your comments.
snooker14

Showing 2 responses by quincy

quincy
373 posts
 
Always, always, always, turn your pre-amp on prior to the amp(s). Always, always, always, turn your pre-amp off prior to turning off the amp(s).
Regards,
quincy
373 posts
 
Sorry Snooker14, I need to learn not to read/respond so late at night. Integrated tube amp. (pre-amp and amp controlled by one power switch) does not permit you to perform the recommended on off schedule. Now back to your question. Three years is about the normal life span for a amp tube....you can squeeze a tad more out of pre-amp tubes. They will still work, but the sound quality and sound stage starts to degrade. It is not recommended that you keep a tube rig 'on' all the time. The tubes can be consumed in a few months. Try a new set of tubes for your rig...it's time anyway.
Regards
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