Six 1940 Philco tv's giveaway

[decojoe67]

Originally Posted by Electronic M

I disagree with your point. One example I can give is intercarrier audio IF. It was a WWII invention that reduced the tube count greatly, and stabilized relative fine tuning of sound and picture...So they would drift together and in the same direction as the set warmed up.

I would like to add further from an article by Jack Davis in A.R.C. Here is an excerpt:
".....the 630TS was the first set to use a 13 channel turret tuner. The video IF's were stagger tuned to give a video bandwith of 4 MC and the horizontal sync was automatic frequency controlled allowing the set to lock-in on a signal as weak as 50 microvolts, thus expanding reception to so-called "fringe" areas. The 10BP4 picture tube, designed for the 630TS, operated with an anode voltage of 9,000 volts, developed through the now familiar fly-back method, doing away with the lethal 60 cycle power supplies that were used in the pre-war sets. The high definition picture that was produced was about sixty foot lamberts, almost ten times brighter than the TRK's. In addition, the area contrast of a maximum of 90 to 1 was the best ever. The set was simple to operate because of the drift-free circuitry...."
Also from Ray Bintliff, from an article about the 630TS in A.R.C.:
"....it is apparent that the 630TS was vastly superior to the TRK-12. It's picture size was slightly smaller, by about roughly one inch in width and height, but it produced better quality pictures and sound...."
I may also add of the addition of the ion-trap on the 630TS to prevent ion burn that plagued the pre-war CRT.
Joe