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Yaesu FT-891: ZIN (Zero In) Feature Explained

I had a great question from one of my YouTube channel subscribers who had watched a video of my FT-891 where the blue L.E.D. was lighting up. What does the blue L.E.D. indicate? It is a companion to the ZIN (Zero In) feature that fine-tunes the receiver so a received CW signal produces your preferred side-tone frequency. The ZIN feature will incrementally adjust the receive frequency, up or down, to produce your preferred side-tone frequency. If menu setting 02-06 is enabled, the L.E.D. will illuminate blue, indicating that the side-tone is now at your preferred frequency. I like 550Hz. I can adjust the VFO myself until the blue light illuminates, or I can press the ZIN option until the blue light illuminates, confirming that the side-tone of the station I’m listening to is 550Hz. Note that the blue L.E.D. does not flash in sync with the dits and dahs. It just lights more solid as the side-tone frequency is reached, and according to signal strength. Warning! Using the ZIN feature on 60 meters can cause the transmitter to disable. The radio will only transmit on the 60 meter channels when the exact, factory programmed, memory frequency is displayed. The ZIN feature can cause the VFO to tune away from the assigned frequency for a 60 meter channel, thus inhibiting the transmitter,. It will seem like your final output transistors are blown, but they aren't. So, how do we precisely tune a 60 meter CW signal? The best solution I have found is the Audio Peak Filter (APF). Enable the APF and use the Multi-knob to adjust the filter center up or down in 10Hz increments, until the side-tone is the strongest in volume. The APF only affects the receive, not the transmit. I hope you enjoy this video and find it helpful. If you find my channel informative and entertaining, I hope you will consider joining my support group by clicking on: www.patreon.com/N4HNH There are 3 levels of support, including exclusive content. Patreon team members gain insight from our technical discussions and internal polls. They also have the opportunity to view certain videos before they are released for public viewing. N4HNH Radio has a Web site, where you can purchase T-shirts with some of the sayings you might hear in the videos. Some of the more prominent videos are featured there as well as a page geared toward ham radio training. Go to: https://www.n4hnhradio.com Another great way to help support this channel is to click subscribe. 73, de N4HNH