tuner to tube preamp


I have connected several tuners to my tube preamp and I am getting a light fizz noise, only with the tuners.i know that the stations are coming in clearly. the noise is not there with other sources. I have changed out the tubes also.
kind of a rice krispies noise. moving cabling around doesnt help much. could this be my power source? i'm actually in a hotel room.
analogsonar
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What rcprince said.

Could be a bad input on the pre.

Try the tuner on other inputs and try a CD or other line source where the tuner was connected. See if the noise is associated with that one input only or not.