a real challange?

[Electronic M]

Originally Posted by Jon1967us

Is the point that there's no or much less interference on UHF, if you use that to transmit in the house, vs VHF?

Nope. My point was they had an antique UHF converter designed to add UHF to older sets that didn't come with UHF when new, and they could still use it if they transmitted UHF.
Interference varies from place to place depending on a number of factors. UHF could be better or worse depending on where you are, what UHF DTV channels are transmitting* in your area, what type of noise is produced by the switch mode supplies you and your neighbors are using, atmospheric noise, etc.

My advice to anyone planning to transmit their own low power analog is start with an agile (agile meaning you can change which channel it transmitts on) modulator, a DTV converter box with signal strength and manual RF channel selection in the menus, and an analog TV.
*You don't want to transmit on a channel that a local DTV station is using as you'll interfere with each other (the UHF band tends to be more packed with transmitters, but ATSC 3 is changing that). I typically use my Zenith DTV converter boxes to figure out which channels have active DTV stations and avoid those channels (I need to get an ATSC 3 capable box to check for those signals too). The static on an analog TV can tell you a bit about what noise exists on what channels too...once you have an idea where other transmitters and noise exists pick something that has the least of that, set your transmitter to one of those promising channels and try it out...If it sucks try a different channel.

IMO The fixed channel modulators are something you get after you've tried a channel with the agile modulator and know it's good... Otherwise you risk undiscovered interference making the fixed channel modulator as useful as a door stop.