Warm up time for record playing

Unless you own a really unusual Preamp; it’s phono stage circuitry is energized when the unit’s powered up (just no signal, unless selected).      At least: I’ve never seen what you’ve described, in any I’ve owned, researched, sold, repaired or upgraded (did a lot of the last three, when in business).

Rodman,

I’m sure you’re right.. The manual for the Conrad-Johnson PV11 merely states that most of the tubes in the preamp are designated for the phono section.
But that doesn’t necessarily mean they’re not energized when the unit is turned on.
Thanks for the enlightenment.

Happy listening!