20" round tube DuMont on the 'bay

[jr_tech]

Originally Posted by Jeffhs

I was wondering whether the set will work with a box because of the IF strip, not because of the tuner. If this is a late 1940s set, the video IF may be 28 MHz (which, BTW, is why so many of these early sets would pick up local amateur radio operators transmitting on ten meters) or some other oddball frequency, not 41 MHz as all sets are today. Wouldn't the difference in IF frequency have a bearing on whether or not a converter box will work with a given set?

NO! It will not make any difference at all. A DTV converter will work with any set that can be tuned Ch 3 or Ch4. The exception to this would be pre-wwII sets that have 441 horiz scan lines rather than 525.A scan converter box would also have to be used, as well, to make it work.
I have used DTV boxes on several sets with the old 21 mHz if... they work just fine!

jr