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Finally made some real progress on the magloop after adding a 100 pF capacitor in parallel to the 5-250 pF variable capacitor…at least on 80m. Now there's too much capacitance to hit 40m. :'(

The SWR on 80m is really good. When I tested FT8 at 100 W, it was around 1.1. :D

But there's a lot of noise. :(

#AmateurRadio #HamRadio

Neil E. Hodges reshared this.

in reply to Neil E. Hodges

The switchable toroid I made is a rudimentary antenna tuner. :P
in reply to Neil E. Hodges

Aw man, something just fried. The SWR jumped from 1.1 to way high out of nowhere. I'm guessing it's "The Doohickey" since that switch probably wasn't really rated for 100 W. :P

Time to build a new one that includes what I learned building the first one! I'll still use the same coil and so on, but I'll have to cut the switch out and toss it. The upside is that I already ordered a pair of beefy switches, using one for disabling the magloop's fixed capacitor and having an extra one, so that means I won't have to wait as long! :3

#AmateurRadio #HamRadio

Neil E. Hodges reshared this.

in reply to Neil E. Hodges

Went through the entire feed line with my NanoVNA and couldn't get it to reproduce, but as soon as I tried transmitting at 100 W, the problem came back. 100% a power capacity issue that the former's low output can't trigger. #AmateurRadio #HamRadio