einfach_orangensaft

@einfach_orangensaft@sh.itjust.works

• i need sleepsh.itjust.works ↗
  Submitted ⁨⁨3⁩ ⁨days⁩ ago⁩ to ⁨science_memes@mander.xyz⁩ | ⁨25⁩ ⁨comments⁩
• ⁨Comment⁩ on ⁨50ohm goes brrrrrr⁩ ⁨⁨3⁩ ⁨days⁩ ago⁩:

  i might be wrong here but i think a dummy load is different from a terminator, they both 50 ohm, but a terminator is more like a connector cap, while a dummy load is designed to dissipate heat and can often take many watts of power over extended time without starting glow

• 50ohm goes brrrrrrsh.itjust.works ↗
  Submitted ⁨⁨4⁩ ⁨days⁩ ago⁩ to ⁨amateur_radio@lemmy.radio⁩ | ⁨0⁩ ⁨comments⁩
• 50ohm goes brrrrrrsh.itjust.works ↗
  Submitted ⁨⁨4⁩ ⁨days⁩ ago⁩ to ⁨science_memes@mander.xyz⁩ | ⁨17⁩ ⁨comments⁩
• ⁨Comment⁩ on ⁨NanoVNA vs. Loop antenna SWR testing [Question]⁩ ⁨⁨6⁩ ⁨days⁩ ago⁩:

  Ah yeah sad, southern germany is a bit far away (besides maybe during high solar activity but even they the skips may fly just right over). Thx for doing some calculations, on the safety distance aspect of it, i kinda assume the psychological effect (knowing that u in the RF near field) is probably bigger an the real effect of 4W of RF heating…and i probably just hallucinated the slight metallic taste in my mouth after 1min of keying down while tx testing (my brain do be like that sometimes).

• ⁨Comment⁩ on ⁨NanoVNA vs. Loop antenna SWR testing [Question]⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  My repositioning the primary loop i managed to get the SWR down to 1.5 :D

  I just hoped i aint cooking my insides when transmitting while sitting next to the loop antenna, a online calculator said at 4W i should keep at least 13cm distance from the antenna, but that was for a dipole not a loop…i need a longer feedline to get some distance…

  I currently at berlin/brandenburg area, i kinda dont think i will be able to make long distance connection till i upgrade my radio to one that supports SSB tx with 12W (AE5900 eventually i hope). Long term i hope to manage to get a setup that allows me to join the europe wide JS8CALL network on 27.245Mhz. JS8CALL supports message forwarding over other nodes, a bit like meshtastic, i heared of people who managed to comunicate to australia via JS8CALL using multiple forwarding nodes, it is very slow tho due to using the same mode as FT8

• ⁨Comment⁩ on ⁨This is my 6,000th post on Lemmy. It's been great eating beans and learning how not to poop for 3 days with you guys! Brb, gotta send my weekly nudes to the admins⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  6k and thats probably just counting the primary account lol, great work!

• ⁨Comment⁩ on ⁨Build my first magnetic loop today, holy sh..⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  I can feel this meme resonating with me

• ⁨Comment⁩ on ⁨NanoVNA vs. Loop antenna SWR testing [Question]⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  I love the word Mantelwellensperre, peak german language :D

  I build a Air-Core choke from a part of feed line right below the antenna now, and got some slight improvements.

  I will try to improve the feeding loop position to see if it gets the swr down a bit more. By now i am already quite happy with the antenna, during a test i managed to make a ~15km Thor8 connection while the antenna was still inside the house (with 4W AM Tx and the receiver in SSB/USB).

• ⁨Comment⁩ on ⁨NanoVNA vs. Loop antenna SWR testing [Question]⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  This is my capacitor (RG58):

  Image

  I dont have ferrite beads right now sadly, but i will try to make a Air-Core choke from parts of the coax feed line, maybe that helps.

  If i would use a balun between feed line and antenna, i need a 1:1 balun i assume?

  I will try to find the frequency where the impedance gets real. Also gona try to maybe build a variable capacitor from 2 metal pipes going into each other depth regulated by a screw, but i mostly wana use this antenna on a single frequency so i hope i dont need much adjustment.

• ⁨Comment⁩ on ⁨NanoVNA vs. Loop antenna SWR testing [Question]⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Here is the measurement with smith chart:

  Image

  There is 2m of BNC RG58 coax between the antenna and the NanoVNA. I calibrated the NanoVNA without the coax line because i was under the impression the line to the antenna is considered part of the radiating system and hence should not be calibrated out. But here is the reading with the coax line to the antenna calibrated out:

  Image

• ⁨Comment⁩ on ⁨NanoVNA vs. Loop antenna SWR testing [Question]⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Thank you for your answer!

  I think i found the root of my problem, the scale settings on the NanoVNA where wrong, to a point where the super slim SWR dip of the Loop was just not drawn on the graph for lack of data points at this point. I changed the scale and was able to see the dip, then tune the coax stub to the frequency i wanted. Now it claims to have a SWR of 3.8 near the frequency i want to use:

  Image

  But i am still a bit confused, the yellow number left of the SWR reading, i assume that is the scale? or does it mean a SWR of 6.125:3.8?

• NanoVNA vs. Loop antenna SWR testing [Question]
  Submitted ⁨⁨1⁩ ⁨week⁩ ago⁩ to ⁨amateur_radio@lemmy.radio⁩ | ⁨18⁩ ⁨comments⁩
• ⁨Comment⁩ on ⁨MAYDAY from the airwaves: Belarus begins a death penalty purge of radio amateurs⁩ ⁨⁨2⁩ ⁨weeks⁩ ago⁩:

  apparently there is still a 2m FM gateway online in belarus somehow freeradionetwork.eu/gateway_repeaters.php i would not date to connect to listen in tho

• ⁨Comment⁩ on ⁨MAYDAY from the airwaves: Belarus begins a death penalty purge of radio amateurs⁩ ⁨⁨2⁩ ⁨weeks⁩ ago⁩:

  that is basically the fear that keeps me confined to CB radio rn

• ⁨Comment⁩ on ⁨Finally got my first pair of thigh highs :3⁩ ⁨⁨2⁩ ⁨weeks⁩ ago⁩:

  This has german vibes somehow, cant pin down why tho

  I too use arch btw

• SSB memesh.itjust.works ↗
  Submitted ⁨⁨3⁩ ⁨weeks⁩ ago⁩ to ⁨amateur_radio@lemmy.radio⁩ | ⁨1⁩ ⁨comment⁩
• Who dosent use turn signals under the sea?sh.itjust.works ↗
  Submitted ⁨⁨4⁩ ⁨weeks⁩ ago⁩ to ⁨[deleted]⁩ | ⁨2⁩ ⁨comments⁩
• [Question] JS8Call CB SSB Bandwidth?
  Submitted ⁨⁨5⁩ ⁨weeks⁩ ago⁩ to ⁨amateur_radio@lemmy.radio⁩ | ⁨1⁩ ⁨comment⁩
• ⁨Comment⁩ on ⁨The void can be loud sometimes⁩ ⁨⁨5⁩ ⁨weeks⁩ ago⁩:

  it happens

• Yeah i do OF(DM)sh.itjust.works ↗
  Submitted ⁨⁨1⁩ ⁨month⁩ ago⁩ to ⁨[deleted]⁩ | ⁨1⁩ ⁨comment⁩
• ⁨Comment⁩ on ⁨shrimp water⁩ ⁨⁨1⁩ ⁨month⁩ ago⁩:

  nooooo let him be, he has goals

• "i can hear the difference"sh.itjust.works ↗
  Submitted ⁨⁨1⁩ ⁨month⁩ ago⁩ to ⁨[deleted]⁩ | ⁨127⁩ ⁨comments⁩
• ⁨Comment⁩ on ⁨Grim Yagi is making his rounds⁩ ⁨⁨1⁩ ⁨month⁩ ago⁩:

  Incredible that in 2026 there are still non encrypted Police radio services out there, maybe i am to EU to understand how that is even possible

• Grim Yagi is making his roundssh.itjust.works ↗
  Submitted ⁨⁨1⁩ ⁨month⁩ ago⁩ to ⁨amateur_radio@lemmy.radio⁩ | ⁨12⁩ ⁨comments⁩
• ⁨Comment⁩ on ⁨I wish manufacturers would make a dPMR446 with a keyboard for texting⁩ ⁨⁨1⁩ ⁨month⁩ ago⁩:

  i like the concept of meshtastic but, sadly i have never seen it working in reality, range in urban settings is basically 150m tops, and routing causes massive issues, battery usage is way higher than expected, and most problematic…LoRa itself isnt a free standart, its a proprietary radio standard making true open source implements impossible, all the lora radios depend on some specific hardware chips with closed firmware on em

• ⁨Comment⁩ on ⁨I wish manufacturers would make a dPMR446 with a keyboard for texting⁩ ⁨⁨1⁩ ⁨month⁩ ago⁩:

  problem is meshtastic is 900MHz, power output limitations and duty cycle limits on that band are annoying also its basically just line of sight due to the high frequency

• I wish manufacturers would make a dPMR446 with a keyboard for textingsh.itjust.works ↗
  Submitted ⁨⁨1⁩ ⁨month⁩ ago⁩ to ⁨amateur_radio@lemmy.radio⁩ | ⁨6⁩ ⁨comments⁩
• Things used to be more simple back thensh.itjust.works ↗
  Submitted ⁨⁨2⁩ ⁨months⁩ ago⁩ to ⁨[deleted]⁩ | ⁨15⁩ ⁨comments⁩
• ⁨Comment⁩ on ⁨Standardization rule⁩ ⁨⁨2⁩ ⁨months⁩ ago⁩:

  That username was a musical flashback, thank you