https://www.moonraker.eu/kenwood-yg-82cn-1w-270hz-narrow-roofing-filter-for-ts-890s?___store=english7852KENWOOD YG-82CN-1W 270Hz Narrow Roofing Filter For TS-890Shttps://www.moonraker.eu/media/catalog/product/h/0/h0-016468a_pr9042_1.jpg154.99154.99GBPInStock/Amateur Radio Equipment/Amateur Radio Equipment/Other Accessories/Amateur Radio Equipment/Other Accessories/Internal Boards (Filters, Crystal Units etc)KENWOOD YG-82CN-1W 270Hz Narrow Roofing Filter For TS-890S