Re: PROCEDURES for MEASURING DM LOSS and CM ATTENUATION of CMCs - 2 measurements
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In July 2020 I measured several chokes for an article in a magazine.
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Compared two 240-31-cores. One with RG58, tight windings, and one with RG174, loose windings. Of course, not one 31 core is equal to the other, but it gives a nice comparison. The core with RG58 is in use in my station for 3.5MHz - 10MHz. The RG174 (loosely wound) core was measured out of curiousity. Draw your own conclusions. Measurements were made with a nanoVNA H3.2 and nanoSAVER v0.1.2 To Hugen: thanks for bringing this nice device to market To Rune Broberg: thank you for this marvellous piece of software. 73, Arie PA3A Op 11-2-2021 om 02:28 schreef Jim Lux: On 2/10/21 5:15 PM, Mel Farrer via groups.io wrote:? YOU missed the fact that the difference in diameter from wire to coax shield will make a difference in the inductance value........................ |
Arie Kleingeld PA3A
