Ran through a couple of mods and an article in the FT Newsletters that mention replacement of the OEM product detector quad with a set of Schottky diodes. Digging around those articles, one finds mention of HP 5082-2900 (a mesh type) as having the lowest noise figure.
Found this vendor as a source:
At least 32 and possibly more are on my to-buy list as upgrades for all of my '980s plus a bunch more period gear.
Hope this is of benefit to someone.
73 - Fred, N8YX
