How to check the 4:1 balun with NanoVNA?

| September 3, 2025 | Amateur Radio (Ham Radio) | No Comments

Got good SWR match with 4:1 balun on bench test with NanoVNA from 1 -11 MHz. So it should cover 160m, 80m and 7 MHz bands. The final test is of course by connecting it to the feedline, between the ladder line and the short piece of coax!