Hi Doug
The 234/freq is a average, not an exact value.
The real value varies with the diameter of the wire element.
Much like the lad who puts 7 gal of petrol in his car, drives 243 miles,and says he got 34.71428532 miles per gallon.?
It's a good starting point, but you do not need to measure to fractions of an inch.
Cheers? Kent G8EMY/W5
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On Monday, July 25, 2022 at 01:33:29 PM CDT, 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
