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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

Those 10 ohm resistors were installed in ST-70s because the preamp plugged into the octals in the front and in that instance it reduced noise. They are totally not needed if you don't use the monaural Dynaco preamps.
The VTA board has a normal input configuration.

Many thanks Mesherm that's great