Quote:
Originally Posted by bandersen
The only thing that happens in FM mode is that the CRT brightness is cut off. All the TV circuits are still running including the high voltage.
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Not so, not with a Du Mont anyway. Sets that did no more than blank the raster with an external phono input are really nothing more than a gimmick.
Any design that was done at all seriously will cut the voltage to the sweep section when in a non-TV mode and the Du Mont sets do this.
ETA: Well damn. I just checked the RA-113 skiz and can see there came a time when the Du Mont engineers stopped being serious! Even my '51 Emerson combo kills the sweeps in phono mode...and it ain't no Du Mont....
