Manufacturing C.R.T.'s... "Philips"-"Mullard" way

[Electronic M]

[QUOTE=old_tv_nut;3235130]The factories still existed, demand for color had increased, there was a shortage of CRTs for the color TV sales rates, round tubes were cheaper than rectangular.

One year (maybe 1967? - have to check) RCA ran a color TV ad earlier in the year with top spots on the page for round sets and secondary places for rectangular; then later in the year ran exactly the same artwork except the positions of the round and rectangular sets were interchanged.[/QUOTEuse In IIRC 1967 demand for color TVs was so high even relative to manufacturer expectations that there was a color CRT shortage... Major brands that didn't make their own CRTs would switch suppliers from week to week, depending on who had inventory to sell them, in order to keep up with orders.

Some makers like RCA tried to phase out roundys as fast as they could...Their last roundy the CTC-20 was a CTC19 rectangular chassis modified to drive a round CRT so they could use up left over CTC16 masks, cabinets and CRTs.