I have a chance--maybe--to own a neat piece of hifi history at a reasonable price, but need to verify that the thing is what it might be.

Frank Van Alstine modified many Hafler products including the dh-101 preamplifier. I searched high and low on the web trying to find an interior picture of a certified Van Alstine (aka simply "AVA") modification of the dh-101, with no success. I can't even find a verbal description that is precise enough to make an id. (I do know that the boards are replaced with new ones but that's slim information for an id.)

If anyone knows anything more specific than what I know (I just said all I know), I would be grateful for the info!

Thanks for reading.