Generally, look for where the most pronounced ¡®dip¡¯ is relative to the frequency you¡¯re tuning for. It should be close to what you¡¯re looking for. If the lowest SWR is at a lower frequency than expected, shorten the wire. If it¡¯s at a higher frequency, lengthen the wire.
73 de KN7GIG
"Silence is golden. Duct tape is silver."
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On Jul 25, 2022, at 14:33, DOUGLAS SEWELL via groups.io <douglassewell@...> wrote:
?Using formula 234/freq for a 1/4 wave vertical with 4 radials I was building gave me a wire length of 16 feet 6 and 1/8 inches. Nano vna gave swr of 2.3 (too high for my qrp station) so tried to find out whether to shorten or lengthen wire. How can I use the nano vna to help with the direction to go. eventually lengthened by 6 inches which brought swr down to 1.3.
As a newbe to short wave radio tx/rx and to nano vna can anyone help with an easy to follow method to use my nano vna for wire adjustment direction. Thanks but difficult just now after suffering 2 strokes so hence the need for help here.
Thanks and 73 to all who read this.
Doug MM7DSA
