I own two adaptors, an Insignia NS-DXA1 and a Philco TB100HH9, and I was surprised by the differences I found. The Philco has the advantage that (when turned on and appropriately configured) it passes through the conventional VHF and UHF television signals. I don’t object to the price of the TiVo 80-3 ($150 at Best Buy), but I do object to having to pay $15 per month to get it to work. The only one I’ve found that can do that is the TiVo 80. Thus, if you want to preprogram in the recording of two television shows on different television channels, you need to buy a new VCR or the digital equivalent. None of the converter boxes I know of allows its channel selection feature to be controlled by any video recorder. Some feed through the RF signal so the boxes can be daisy-chained others do not. Some have remotes that can control the TV, and others do not. Some change channels in a few seconds others required many seconds. Some have the capability to adjust the volume of the sound coming through the television’s speakers others do not. However, not all converter boxes are equal. Both get flawless reception on all channels. I use an outdoor double-bow-tie UHF antenna, 6 meters above grade, with a 300-to-75-ohm balun transformer to feed nearly 100 feet of coaxial cable terminating in a splitter for two TV converter boxes. I live about 80 kilometers from Mount Wilson (in Southern California). This is part of IEEE Spectrum's Special Report: The Day Analog TV Dies
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