2. amps-preamps
  3. 129420-5961

Is this tube rush ?

When my tube phono preamp is turned on I hear a slight rushing/ whooshing noise as I turn up the volume on my amplifier. When music is playing the whoosh is inaudible but it reappears on very quiet passages e.g between tracks so I suspect it contributes to the noise floor. Is this what people call " Tube rush"?
If so how can I reduce it? Is it due to aging tubes or an inherent result of the circuit design and thus incurable?

rrm

Showing 1 response by mechans

mechans
3,048 posts
 

That sound upon powering up is highly consistent with "tube rush".  In some instances but not yours the sound disappears.

It is a good time to get new tubes, per Rodman 99...You should try to get very quiet selected tubes.  A phono stage in particular requires the least noisy tubes you can get, (most of them anyway)

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