WHAT TO DO ABOUT DIGITAL TV CONVERSION
Thanks to The Consumerist blog for this diagram.
If your set is NOT digital-ready, then you will need to buy a converter IF and only if you don't have satellite or cable.
Many Portland-area channels will change their channel numbers. Click on the chart below to see it enlarged and sharper.
Since the list above shows every VHF station in Metro Portland will also have a UHF channel, you can go UHF-only, and therefore a VHF antenna isn't needed.
Below, please find a model antenna made for less than $10 in materials. Specifics on antenna design will follow over the next few days.