RADIO HAM: Spiral Loop Capacitor build. Butterfly Capacitor Build
How to build a capacitor for the 40m or 80M spiral loop antenna or anything that needs a Variable Capacitor.
Full kits are available from
https://www.etsy.com/uk/shop/SnowistC...
CAPACITOR DIY KIT | TA1LSX Butterfly Capacitor Kit with Aluminum Plates
or you can source the parts from different places.
Fischer Elektronik Round Brass Spacer AHM 4380 5 5mm RS Components
Plates from the snowistcorner or cut them your self.
Bar from a DIY shop along with Nuts..
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Cheers
Mike - M0MSN
P.S. do not take my word for it, give it a go for yourself.