2. vintage
  3. 160721-2279

How long can I expect tubes to last on a preamp or MW CD player?

Secondly, what would be the signs of tube deterioration?  Without a tube tester, is there any way to tell how much life they have left short of they aren't working anymore?  I have 7 tubes between the TRL DUDE and MW 5400 Signature Truth.  I may have hit that point on at least a couple tubes.  Seems to have dropped a little in SQ.  The 2 SNL7 tubes on the MW are only a couple months old.  The rest have been on 24/7 for at least half of their lifespan, about 4-5 years with NOS tubes in them.  I still have the original tubes with very little use.

Bob
dorkwad

Showing 3 responses by jjss49

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jjss49
6,612 posts
 
dork

the tubes you are referring to is the 6SL7 gain tubes in your dude

try swapping them side to side see if the channel imbalance switches

call or email brent jessee or jim mcshane tell them you need replacement tubes for your dude - they will know what to send you (google search will give you their contacts, they are stalwarts in audio tube supply...)

good luck
jjss49's avatar
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jjss49
6,612 posts
 
i think i will change my handle to numbnuts
jjss49's avatar
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jjss49
6,612 posts
 
you don't want to leave tube gear on 24-7

yes i think some of your tubes, based on your description, can stand replacement - when you get new ones, see if the sound improves, then you will know


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