I noticed that too. My 1S1 doesn't have that board either, and it
doesn't look very Tek-like. I was going to suggest it might be
something to do with substituting for the 8056 Nuvistor, but that
still seems to be in place. Odd.
Chris
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On Mon, Mar 8, 2021 at 1:14 PM <jhpyle@...> wrote:
In the photos on eBay, I see a circuit board mounted on clips on the reverse side of the horizontal board, which I don't have in my 1S1 and that I haven't seen in pictures of the 1S1 on-line. I don't know if that is a user modification or maybe a feature of later serial numbers.
