Thanks Radioactive :thmbsp:
The FM section only got better on later 400's with the addition of one more IF section. Nowadays, the 400's FM section needs a bit of work to account for the changes in FM broadcast standards over the years since these were made, aging of some electrolytics, etc.
Comparing your review and the 400 specs I have reveal very similar results - refreshing and a testament to the engineering that went into vintage audio gear.
As a comparison, do you have a review of (especially) the McIntosh 1500 intergrated tube receiver made at the same time, or the Scott 299, etc.?
Also, I'm looking for a review of my Luxman KX-101 cassette deck that was in the Feb. 1983 issue of High Fidelity. My library has High Fidelity on microfilm, but only from 1985 to when they were taken over. I've got an inter-library search request for this article, but that request was over a month ago and I doubt one will turn up.