I had the first 3 components you listed. I purchased them new back in the late 70's. I believe I sold them to a neighbor in the mid 1980's. The preamp was really nice. I saw a NOS on eBay recently.Crapo picture, in the stable:
TAE-5450
TAN-5550
ST-4950
TC-206SD
TA-5650
PS-X75
Broken TC-K7II