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radiomobile · 30th Nov 2021, 9:53 pm

Further to reply from John (Sundog) "back in the day" there was a device like a pencil called a Tuning Wand which had exactly what he described ie a ferrite slug at one end and a brass slug at the other.

30th Nov 2021, 9:53 pm	#9
radiomobile Pentode Join Date: Nov 2020 Location: Bristol, UK. Posts: 132	Re: Hard wax on RF coil ferrite slugs Further to reply from John (Sundog) "back in the day" there was a device like a pencil called a Tuning Wand which had exactly what he described ie a ferrite slug at one end and a brass slug at the other.