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#40
30-04-23, 04:20
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Measurements
This is a good article by Dave Lawrence. From what I have read about variometers, they are not ideal in a electrical sense , the rotary inductor or roller tuner is a better method of electrically adding length to the antenna.
https://www.qsl.net/ve3bdb/antmeas.html These days, you can buy a nanoNVA device for hobby use. The VNA has the ability to analyze the complex impedance of the 19 set variometer and antenna and give a direct result in various forms. The nanoVNA are easy to buy on most of the popular retail platforms . And small spectrum analyzers are available for hobby use as well. https://www.aliexpress.com/item/1005...d=gkAQdhUhNQmF https://www.aliexpress.com/item/1005...170019037756_1
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad Last edited by Mike K; 30-04-23 at 04:37. 
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