Ever wonder what the those strange buttons on the front of your new HF radio do? Dr. Balun explains what the RIT and XIT buttons are for and how to use them. I've got some exciting new products to show off this time and I'm going to show you something completely off topic but very cool.
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Source: QRZ News
Link: How to use RIT & XIT | SWR Magic| High End Knives K6UDA Radio Episode 43