Preamp? Thoughts on my system? IMF speakers.

[jbrahen]

oh, also want to include that I burned the tip of my finger with the soldering iron. Not sure if that affects the sound of the amp, but wanted to mention. It doesn't hurt that bad, since I'm really strong.

 

[Doc B]

It doesn't affect the sound, but it smells like steak hitting the grill.

 

[Paul Joppa]

T7 and T14 are the 12AT7 driver plates, and should be within the 170-230v range. The higher voltages you measured indicate weak emission from the cathodes, especially T14. This is a probable reason it sounds off-kilter.

Many times an old tube will recover emission with 50-100 hours of run time re "re-form" the cathode surface. No signal is needed, just power.