Dynaco PAT 4 Pre-Amp ....Why is it Bashed??

Man, you're dating me. In the mid 70s I built a PAT 5, then after reading a review, I had it modified by Van Alstein? It was then called a FET 5

Pat 4 is ancient history.

The PAT-4 was first introduced as a kit along with the Dynaco 400 SS amp. I built many of these on the side while i was working at Bendini building tube amps and i sold them as complete units. I remember back then that depending on who did the build that units could sound different from each other, i estimate that i built and sold over a 100.

Personally i never liked the way they sounded they had what i considered what was to become the classic SS sound that we lived with for several decades.

Anyone  know anything about Frank van Alstine? I have a chance to buy a Pat 4 restored by him and am wondering if that rings a bell with anyone here.

So it's spelled van Alstein?. And it has a sticker that says FET on it.