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 5 responses by dorkwad

dorkwad OP
538 posts
 
Thanks jjss49,

I will look into them.
dorkwad OP
538 posts
 
Thanks for the replies jjss49 and noromance.  Sounds like I'm well over.  The PPT stuff made such a difference in performance, I didn't notice the drop-off in SQ until this past week.
dorkwad OP
538 posts
 
elliottbnewcombjr,

Thanks for the compliment--I resemble that remark.  It will change my life.  The rest of the comments were interesting reading and maybe helpful.
dorkwad OP
538 posts
 
Thanks for the advice e.  I will try that out.  I have that record, not CD, however.  I will say that the system has been leaning slightly towards the left with most all voices.  Didn't used to do that.  I have the TRL DUDE preamp so it will takes a couple days to make sure it's totally without any saved up power in the caps--I like to live, before I switch any tubes.  I can't really remember what tubes are inside other than a pair of SNL7's.  I'm not sure I have changed the other 2.
dorkwad OP
538 posts
 
Just spoke with Brent today about the 6SN7 tubes and 5AR4GZ34 rectifier tubes. He seems to be hot on the RCA 6SN7 GT tubes and the Mullard GZ34 tube. I looked up my records in my emails sent and figured out I bought the DUDE in late 2016-early 2017.   I bought the MW 5400 about the same time. So the tubes were left on probably 160 days 24/7 and shut off when not in use much of the rest of the time. No matter what, Brent figured by the sound of my system and this amount of use that it is time to change the tubes and it should make a very significant difference. I won’t leave them on anymore when not in use like I did before.   I will talk to Andy at Vintage Tubes in Michigan on Thursday about the 5 tubes I will need. Tomorrow I will be able to safely open the DUDE without fear of curling my hair or worse. 

Thank you e & j for your personal experiences on what happens when tubes begin to deteriorate in sound due to age. I’ve been able fortunate to assemble a really good sounding system because of good ears and a fair idea of what real music sounds like in my head. But I still have a long way to go on understanding the technical aspects of the various components.

Bob


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