Hi guys. This is my first time with a headphone amplifier kit, and first time tube rolling.
I purchased a Tung-Sol 6080 off etsy for $40 from a guy who claims it was triple-tested. However, I haven't been able to get any sound from the right channel after insertion. Also, the LEDs closest to the transformer on my speedball board do not turn on.
If I max-out the volume on the crack and isolate the right channel on my computer, I can actually hear a tiny amount of sound. If I level the channels out, it's almost listenable, but the detail on the right is gone and of course it's not ideal.
Do I need to modify the crack in any way to get this tube working?