2. amps-preamps
  3. 161387-96791

Constant noisy tubes maybe go solid state?

I have a Quicksilver Line Stage Preamp (12AT7) mated to an Odyssey Khartago Stereo. Overall I like it. Way too much gain but I digress. Weeks after receiving it I rolled in a few different tubes, kinda fun to color the sound signature. I liked rhe RXA black plates I got and those stuck around for more than a year. They started going microphonic and making noises so I ordered another pair (noisy) then another different vendor (blasts of white noise) and another set that arrived today (one is noisy as holy hell and one seems fine).

So where does one order preamp quality tunes that are quiet? Is there something I’m not requesting when ordering? Maybe dump
snd go solid state? I’m trying to be humorous because I’m pissed. Ha.
gochurchgo

Showing 3 responses by cleeds

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cleeds
5,642 posts
 
daveyf
... these tubes are what are considered 'pulls'. IOW, they are tubes that have been used for years in some piece of gear and have been removed to now be sold as NOS tubes. Nothing wrong with this IMO ...
There is something very wrong with that. "NOS" means "New Old Stock." If the tube is used, it definitely isn't NOS.
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cleeds
5,642 posts
 
facten
Help me understand why you think you need to be wary of NOS in white boxes from reputable tube dealers ...
Most likely, if it’s shipped in a white box, it isn’t New Old Stock. Rather, it’s a used tube in a plain white box.

Some tubes were shipped new by the manufacturer in bulk without an individual box, but they’re the exception.
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cleeds
5,642 posts
 
facten1
... as long you buy from a reputable dealer and he insures that the tube tests unused and measures within industry guidelines it is NOS ...
NOS = New Old Stock
Used ≠ New
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