Alternative 6SN7 family tubes

[2FarGone]

I have a Von Gaylord LAD-L2 preamp that I’ve been running brown-base 5692 tubes in and the combination has been exemplary, but the last matched set of tubes (purchased from a reputable tube reseller) lasted only about 7 months before beginning to produce an unacceptable noise level. Does anyone have a suggestion for 6SN7 family tubes that may have comparable performance to the brown-base 5692? I’m okay with spending the money for good tubes, but I consider 7 months to be an unacceptable lifespan for tubes this expensive.

I prefer not to purchase Russian or Chinese tubes of current manufacture for personal reasons I needn’t go into here. Any suggestions?

 

[Michaels HiFi]

Hi - 2 things:

Possible there is something in your unit that may be causing them to last a shorter time;

What year are the tubes you currently have? Without knowing year/mfg it's impossible to make suggestions.

Happy to help but need to know exactly what tubes you have now. If you can post 3-4 pics of what you have now that would help as well.