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tubed preamp off and ss amp left on?

Why can't I leave my my ss amp turned on with the tubed preamp turned off? Loud hum occurs through speakers with this condition. When I had a ss preamp I could leave the amp powered all the time with the pre off. I would leave all powered up but concerned about the preamp tubes wearing prematurely. Is it a reasonable conclusion that I could leave everything powered on all the time and just change the tubes once per year?
twc
jmcgrogan2's avatar
jmcgrogan2
6,346 posts
 
Make sure you power down your amp before you disconnect the interconnects!!!
twc OP
42 posts
 
Progress maybe. I disconnected the preamp at the amps inputs and the strangest thing happened. The left channel was silent yet the right channel had the same hum and at the same level. I then plugged the interconnects back in and the hum returned to both channels. What could be happening and what is my next logical step? I have some more speaker cables that I can try, so I think I will start there. Your help in troubleshooting is most appreciated. This is a great forum.

Audio can be compared to women as a source of great pleasure and much frustration.
audphile1's avatar
audphile1
7,857 posts
 
have you tried what I suggested earlier? about the cable tv....
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