Yeah the Blonder Tongue agile modulator is like the "talking house" transmitter of the vintage TV realm. Mine is tied into my AV system via Kramer Matrix switch so the Roku/DVD/Raspi/VCR/LD/SAT can be seen on any analog TV in or near the house. I can even take a 13" analog TV out so I can watch Cheers/Taxi in the hot tub
On that note I need a "talking house" as I get a lot of music from the satellite reciever that I'd like to hear on the Philco.......