Published On Jun 3, 2023
Second Hand Embarrassment, Spoiled Little Brat, Cops and Robbers.
This was a test of an analog NTSC television transmitter I built, and, I figured I'd play some videos that have analog effects in them. Due to how I captured it (on a VCR), the visual resolution is capped to about 300 lines, about 3 MHz luminance bandwidth. Honestly, the videos look quite fine when blasted through all of this. I think this might actually be an improvement, honestly; those songs look great in analog!
Test of a NTSC VHF lowband broadcast transmitter (on channel 4) fed with a high-quality DVD player output (going into a video mixer to generate the colorbars testcard and stack the callsign bug over the video at the bottom right). As transmitting a full-black picture: 100 watts visual power and 25 watts aural power. A modified FM Stereo exciter generates a MTS (aka BTSC) sound signal that runs on the audio carrier of channel 4, but it isn't phase-locked to the luminance carrier. This is all an experiment, WHST isn't a real licensed radio station, and, all of this was going into a dummy load. I don't have a 70mhz transmit antenna that could handle that kind of bandwidth or power! For the receive side, I used a high-quality Sony VCR that could record stereo TV, and, I then played that back into a capture card. I was going to record the TV signal emanating from the dummy load (I wrapped a long wire around one of those Heathkit Cantenna oil-filled load resistors) with the capture card, but, it couldn't receive stereo! Well, there ya go. Underscores with its analog under-scores on an actual analog television transmitter.
It's my understanding that this should fall under fair use -- this is a demonstration of a lame system I've built. If this needs to be taken down, just let me know!