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Cable elevators
https://positive-feedback.com/audio-discourse/bunking-cable-lifters/   On positive feedback there is an article on bunking cable lifters, they actually measured a difference in capacitance with cable lifters in place.  
Riddle me this....
I have reversed the polarity of my apogee duetta speakers because my preamp inverts phase, the voices are centrally located and the focus is just fine.  
Is this describing a blown tube, or two blow tubes?
Tube testers don't use real world plate current under load, so the life test doesn't mean much.  
Is this describing a blown tube, or two blow tubes?
@ghdprentice  I agree, even if you had a tube tester that was calibrated and working properly, they are of limited use especially for power tubes.  
Is this describing a blown tube, or two blow tubes?
Tube testers are not very good for matching tubes, you may be able to weed out a shorted tube though.  
Leaving my amplifier on ok?
I did have a carver receiver go up in flames, but it only lasted a split second, and unless there was a lot of paper and kindling on top of the receiver there was no chance of a fire.  
Why is solid state more popular when tubes are better?
@emergingsoul  you do realize that a 300 watt tube amp will not have the harmonic distortion content like a set amp would have.  
SET Lovers, what's the one solid state amp you love(d)?
I don't consider Cary audio the very best example of tube equipment.  
Leaving my amplifier on ok?
@pindac    I have never heard of an insurance company not paying because of the reasons you state, do you have some examples?  
Why is solid state more popular when tubes are better?
@bolong    What if you are not overdriving the amp or preamp? Tubes still sound better for some reason.  
Krell Multiamp Chassis and Hum
@erik_squires  Exactly what I did when I first got my krell ksa 300s and had to use an AVR for a preamp, I had ground loop hum and it disappeared when I disconnect the coax from cable tv.    
This e-mail has been cryogenically treated
How would you ever verify if your speaker cables are 99.99% OFC copper?  
Tube Preamp: How many tubes does it take to .................
My next line stage is going to have 6 power tubes in the signal path.  
Tube Preamp: How many tubes does it take to .................
Just because a preamp has multiple tubes doesn't necessarily mean they all have to be matched. I know of a line stage that has 10 tubes in the signal path and only pairs need to be matched.  
Tube Preamp: How many tubes does it take to .................
Power tubes can even be used in a preamp, one manufacturer I know of uses power tubes in some of his preamps and DACs.