Okay, a quick update: it probably won't be December, but it almost certainly will be January. Here's why:
1. We're having trouble getting the metal quality we need. The chassis design has been an ongoing, interactive process with multiple vendors, and is still getting nailed down with the final selected vendor now that the PO has been placed.
2. We're going back and forth on two gain stages. Ragnarok is modular, so we can swap out gain stages and compare them. The one we've been running is very, very good, but we have one we think is better. I don't want to ship a Ragnarok that isn't as good as it possibly can be, so if we can work out some operational oddities with the better one, that's what I want to ship it with.
3. @(&$(&%^%!!! humming transformers. We're still working this out--the 400VA transformer in Ragnarok is a very different beast than the board-mounted transformers we've done before. We're currently taking the HV rails and LV rail out of the main transformer and putting it on a board, to hopefully eliminate the hum. Obviously, we can't ship this if it sounds like a refrigerator.
So, there you go. Still working some things out. Sorry for the delay.