This is the optional 500Hz CW filter for the FT-1000 and FT-1000D, at the 455KHz 3rd IF. Also known as XF-E in the manual. For improved reception on CW and RTTY. Easy installation, just clip a diode and plug this in. Excellent working condition. Full proceeds go to charity - thanks!
Will be shipped within 24 hours of receipt of payment. Check my 100% feedback rating and buy with confidence. Thanks for looking!