03-12-2018, 07:43 AM
Just closing this one off as I have actually sold the unit now as I need to downsize my collection a little.
Looks like the UCL83 at the bottom of the heater chain was slightly leaky from Heater to Cathode, but also I was doing my testing on top of an ungrounded anti-static mat on the workbench, it was inducing a horrendous amount of noise which went away as soon as you moved away from the bench. The player ended up being largely hum-free after swapping out the UCL83.
Regards,
Dave.
Looks like the UCL83 at the bottom of the heater chain was slightly leaky from Heater to Cathode, but also I was doing my testing on top of an ungrounded anti-static mat on the workbench, it was inducing a horrendous amount of noise which went away as soon as you moved away from the bench. The player ended up being largely hum-free after swapping out the UCL83.
Regards,
Dave.
