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I am using a 15 foot extension with no problems.
Sorry, there was a problem. Please try again later.Yes, you can use a 20-foot coaxial cable with the Insignia™ - Amplified Ultra-Thin Indoor HDTV Antenna. The antenna comes with a 10-foot coaxial cable, but if you need a longer one, you can purchase a 20-foot coaxial cable separately. Just make sure it is a high-quality coaxial cable to maintain good signal strength and quality. -Ed | Insignia Support | https://www.bestbuy.com/site/brands/best-buy-brands/pcmcat1596746025285.c?id=pcmcat1596746025285
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