fullsquare

joined 1 year ago
[–] fullsquare@awful.systems 5 points 3 days ago (1 children)

well that you can't tell good from bad is a skill issue on your part then

[–] fullsquare@awful.systems 6 points 3 days ago (5 children)

inshallah in five years all of this horseshit will be distant fever dream memory

[–] fullsquare@awful.systems 3 points 3 days ago

i like the 2y+ lead time

[–] fullsquare@awful.systems 2 points 3 days ago (1 children)

will pencil keep it wide open enough? the intention was to keep it slightly open, then put it in a bag and go around. years back when i had a laptop that shut down wifi with lid closed i solved that by taping a packet of instant ramen to palmrest for one evening

[–] fullsquare@awful.systems 1 points 3 days ago (1 children)

macos users have budget for these objects

[–] fullsquare@awful.systems 1 points 3 days ago (3 children)

depending on your build, putting an extra switch disconnecting lid switch could be a better idea because power management is hell on linux

[–] fullsquare@awful.systems 8 points 3 days ago* (last edited 3 days ago) (3 children)

because it's targeted at tools, too

and also, it would break the hinges in intended use, and as pictured it can't work (doesn't hold the lower half). pair of wedge shaped things would work much better, i think

[–] fullsquare@awful.systems 8 points 3 days ago (2 children)

keyboard is wrong way for the same reason

[–] fullsquare@awful.systems 3 points 4 days ago

i see no reason why P/E could be negative, then it works like negative absolute temperature

[–] fullsquare@awful.systems 4 points 4 days ago

there is a degree of risk that is acceptable for business. 90% drug trials fail; if you are inventor, you make a startup, package your pre-trial drugs and associated IP there, then pitch it up and cash out. vcs have money for clinical trials. sometimes you have phase 1 results that you got on your own too. the further it goes in trials the more it is worth; result is the biggest gacha in the town

[–] fullsquare@awful.systems 7 points 1 week ago

techbros really just want to be slavers and mask slipped now a bit more

 

I'm picking up an idea left by Dick KK4OBI, that you can lower impedance of dipole by arbitrary ratio if said dipole is zigzagged or otherwise uniformly contorted in some meandering shape. Side effect is that dipole becomes shorter and needs more wire. While there's data about impedance for fundamental, there's nothing about harmonics which is something that OCFD might be expected to handle well, so guessing that the really important part is aspect ratio of meander, i've made a couple of VHF-scale models with different meander aspect ratios (and many more much smaller sections), and some of data i've been able to collect roughly matches. The thing I'm trying to figure is what aspect ratio should be to cover multiple bands while using OCFD, say 40-20-15m bands, and whether impedances at different frequencies fall at the same rate. Eventually, when i figure this out, i'll try to make a full size 40m fundamental antenna, as I think that i've figured it out in mechanical terms

However during testing it turned out that I have severe common mode current problems, as two 10mm dia split ferrite beads were evidently not enough, so what little i've been able to collect is mostly useless. When I packed up everything I've found 4 Laird 28B beads that should together give 1100 ohms of impedance or so at 100MHz which also happens to be close to lowest frequency in my setup. Is this enough? Feedline is currently about as long as shorter arm of straight dipole at 22,5:77,5 split ratio, should I change it?

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