Timo, It all depends on how the tri-filar is connected. It's just three parallel windings on a toroid. You could connect all three is series, tap one of the common points and get 9:1 or, you could tie

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There are people selling these as pulls on Alibaba. I have no idea why they are pulls but they are very cheap as they obviously have to be. I'll send you a PM on this. Another poss is Mini Kits in Ade

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Bertel your path should be okay. i suggest starting with the kit assembled without the PA, operate it QRP to see that everything is working. at this point you ONLY need a 5 volt supply - the current i

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Phil Tim in ZL back again. As far as the OPT is concerned , I have had a look at optimising it at 80 Mhz as a half way house between 6m and 2m. Type 43 material as per previous is death to RF at such

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