I think GT-matic are rare because the CRT's didnt last on
both the 19" & 25". Had an awesome pix when good though.
Late GT's also had FBT's go & take the HOT & regulator. Using
OEM parts it was a $200 repair carry in !.
C1 & 2 chassii only went in Maggies & was there best ever IMHO
C3 was a low end POS found in all NAP sets. Worse power supply
ever in a TV. Worse than a Sony with 2 SG613's
The rest of the C's power supplys were a pain. The rest of the chassis
OK but had common probs.
73 Zeno