Advent A.K.A. Electrohome show up but no others I remember.
Since they all had either a modded Sylvania or Electrohome chassis
tech problems are rare. They were very basic early SS sets easy to fix.
A rich mans set. That means only the rich & very poor bought them.
I worked on a few newer ones, dont remember the names. These were all out like nothing else & hung on the ceiling & gave a HUGE pix. Modules were
upwards of 1 K USD $$$ !!! US built & no holds barred. Real HQ stuff.
73 Zeno
LFOD !