#7761
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Here's the summary of the tests George (aka Tubulab) did on SE 6av5. It's what got me interested in the tube and I'm glad I got the chance to try them in push pull at least.
http://tubelab.com/articles/tube-tes...v5-sweep-tube/ |
#7762
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sudden hum from LP-2030
Hi all,
A few days ago, I started hearing a hum from my speakers when no music was playing. I detached everything except my KT88 Firebootle and powered it up - silence through my speakers, even with my ear pressed to the drivers. I then connected the LP-2030 to the Firebottle via my normal interconnects, with nothing attached to the LP-2030, and powered the two up - the hum returned. The hum increases as I raise the volume knob, and more strange, is present even when the selector switch is on "mute". I tried swapping all of the tubes, but the hum persists. I tried using a "cheater plug" on the LP-2030 to see if it is a ground loop hum, but that made no difference either. Does anyone have any suggestions? Thanks so much, Chris |
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