Giovanni - ZL2GX

Some unusual uses for chalk, and unexpectedly, yoghurt: https://www.bbc.com/future/article/20260625-why-the-french-are-painting-chalk-on-their-windows #climatechange #science #diy

@NH6SP@mastodon.radio Excellent choice! Nice audio and has transmit tone controls too - useful for tweaking your audio. A tip: holding down the Cent/Fix button reveals a mode I'd wanted but didn't realise existed: it scrolls the cursor across the waterfall rather than the default scrolling the waterfall and leaving the cursor fixed in the center. This mode is really nice for displaying a 50KHz section of the band during contests. #hamradio #amateurradio #ic7300

@oz1lqo@techhub.social Hmm - I've got some BF494s :-) Strange bias on the first two transistors - operating current would seem to depend on the HFE (gain) of the transistors but the DC voltages look about right. From the scope at 1uS/div the frequency for the 25x gain is about 500KHz. How stable is the gain with frequency? I guess, even if it rolls-off, the loop is also becoming a great fraction of a wavelength so that probably compensates a bit ... #hamradio #swl #rfengineer

@mcdanlj@social.makerforums.info You're right - it' seriously impressive. Took me a moment to realise (unlike 4NEC2) that Y is the vertical axis (not Z) - however on further fiddling Z really is the vertical axis but the little coloured X-Y-Z indicator seems to have Y and Z swapped/mislabelled. Here's an inverted-L end-fed via a 1:49 transformer #hamradio #amateurradio

@mcdanlj@social.makerforums.info I've added an issue in AntennaSim's Github repo.

@jessamyn I do like the quote *"I'm going to a commune in Vermont and will deal with no unit of time shorter than a season."* from the post https://news.slashdot.org/story/26/03/26/1628201/tracy-kidder-author-of-the-soul-of-a-new-machine-dies-at-80

@praxiscode@mastodon.online @NH6SP@mastodon.radio It wasn't in the original firmware but was part of (I think) revision 1.41. It's definitely in v1.42.