TheCoolDoc
New member
It's a stock Crack with Speedball build except that I've put in a Sylvania 7236 Tube.
There was subtle hiss prior to replacing the 6080 with the 7236, but now it is a greater than before. Volume doesn't change the hiss except when the amp is warming up there is crackling at very high volumes.
Interestingly when I replaced the 6080 with the 7236 there was zero hiss, but it came back after a few hours.
I can't find any bad solder joints as I've resoldered every single one.
I know the tube takes 100s of hours to form a cathode. Could that be the reason for the hiss or is the circuitry in the amp a concern.
Since it is only on the right channel it worries me. It's not outrageous, but when I put my headphones on you can tell its there.
Tapping the 7236 tube gives no feedback in the sound, however, tapping the 12AU7 does.
There was subtle hiss prior to replacing the 6080 with the 7236, but now it is a greater than before. Volume doesn't change the hiss except when the amp is warming up there is crackling at very high volumes.
Interestingly when I replaced the 6080 with the 7236 there was zero hiss, but it came back after a few hours.
I can't find any bad solder joints as I've resoldered every single one.
I know the tube takes 100s of hours to form a cathode. Could that be the reason for the hiss or is the circuitry in the amp a concern.
Since it is only on the right channel it worries me. It's not outrageous, but when I put my headphones on you can tell its there.
Tapping the 7236 tube gives no feedback in the sound, however, tapping the 12AU7 does.
