Earth lift resistors on PC-3 and VTA driver boards
Posted: Sun Oct 04, 2009 5:58 pm
Hi folks.
Question regarding the original ST70 driver board, vs the VTA upgrade:
There are two 10R earth lift resistors on the original board. Here in the UK I got a hum on my ST70, until some kind soul informed me that if I leapfrogged the 10R resistors the hum would go, which indeed it did :)
So far so good.
I am going to fit my (upgraded - new caps) VTA board to the ST70, and need to know whether I need to do something similar with this board?? I seem to remember I had some hum with this board originally (It's been a while), but I'm not sure if that was due to earth lift resistors or the metal stand-offs which the board came with and could have been creating a loop. Will be mounting it with nylon stand offs this time.
So basically, are there any earth lift resistors on the VTA board - there don't appear to be from what I can see?
Cheers,
- John
Question regarding the original ST70 driver board, vs the VTA upgrade:
There are two 10R earth lift resistors on the original board. Here in the UK I got a hum on my ST70, until some kind soul informed me that if I leapfrogged the 10R resistors the hum would go, which indeed it did :)
So far so good.
I am going to fit my (upgraded - new caps) VTA board to the ST70, and need to know whether I need to do something similar with this board?? I seem to remember I had some hum with this board originally (It's been a while), but I'm not sure if that was due to earth lift resistors or the metal stand-offs which the board came with and could have been creating a loop. Will be mounting it with nylon stand offs this time.
So basically, are there any earth lift resistors on the VTA board - there don't appear to be from what I can see?
Cheers,
- John