In 2017, I restored an Ameco R5K (kit version) shortwave receiver I received from my friend Joe KA9QAT. It worked pretty good, but while surfing the web I stumbled across a blurb with an update published by Ameco on Dec 13, 1967. It converts all I.F. amps to common emitter configuration, and boy does it make a difference!! Below is the R5K schematic, followed by a marked up version with the mods. I wanted to get this uploaded before I lost it forever :-)
The original R5K Restoration blog is on my site HERE...
