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@primonatura@mstdn.social
2025-10-04 12:01:01

"Microplastics reduce soil fertility and boost production of a potent greenhouse gas, study shows"
#Microplastics #Plastic #Plastics

@mcdanlj@social.makerforums.info
2025-09-01 20:31:29

This is the third full build iteration of my miniature #QRP unun supporting both EFHW and "random wire" antennas. At this point, it is still fiddly to build, but I'd expect an experienced #HamRadio DIY / homebrew enthusiast to find the build not terribly difficult.
There's nothing…

Photograph of tiny QRP unun showing size of overall assembly including integrated coax. BNC connector for scale! The corners of the box have M3 countersink screws. There are three knobs on the side; a purple knob for the counterpoise connection, and red (high voltage!) knobs for "random wire" and end-fed half wave connections,
Inside view of unun autotransformer showing construction details, next to a ruler for scale, showing that the entire box is less that 3.5 cm across. There is a half-inch ferrite in the box, wrapped in kapton tape, with a 14-turn autotransformer wrapped around it. There are three M3x8 brass screws through the edges, connected to the transformer with ring terminals. The screws are held in place by captive nuts. An RG316 coax segment comes in through the side of the box to feed the autotransformer…
Side view of assembled unun, without a terminal knob, showing how thin it is. The letter "R" is visible on the side of the box, indicating that the adjacent terminal is intended for a "random wire" antenna.
A photo showing a comparison of this version of the unun design to the previous iteration, configured for deployment. The previous iteration was built on a SO-239 bulkhead connector, with a PL-259-to-BNC connector attached.
@primonatura@mstdn.social
2025-10-04 18:01:00

"Revolutionary Study Shows Plants That Remove Microplastics Work Better Than Current Technology"
#Microplastics #Plastic #Plastics

@publicvoit@graz.social
2025-09-04 10:47:54

One of the rare examples where #Microsoft actually created a software itself (instead of buying some 3rd party tool embracing it) was published as open source (MIT license): github.com/microsoft/BASIC-M65

@mxp@mastodon.acm.org
2025-09-05 09:22:17

“We’re all used to having our lights respond to verbal commands at this point.” Are we!? Why!?
mastodon.social/@verge/1151508

@poppastring@dotnet.social
2025-09-05 02:25:26

Microsoft open-sources its 6502 version of BASIC from 1976
github.com/microsoft/BASIC-M65

@mcdanlj@social.makerforums.info
2025-10-04 23:37:20

Today's #HamRadio adventures... My oldest and I went to do #POTA together. He's a technician, and 10m was mostly dead where we were, except for a booming SSB QSO with California to a club doing the CA QSO party, so he didn't get his 10 today.
I started running CW QRP (5W) on on 1…

@mcdanlj@social.makerforums.info
2025-10-01 21:52:08

The ARRL has a long online text band plan which they have condensed for HF into The Considerate Operator's Frequency Guide which is not really in a convenient form to print and carry with you into the field when operating portable

List of frequencies and frequency ranges with annotated usage:
1.800–2.000	CW
1.800–1.810	Digital Modes
1.810	CW QRP calling frequency
1.843–2.000	SSB, SSTV, other wideband modes
1.910	SSB QRP
1.995–2.000	Experimental
1.999–2.000	Beacons
3.500–3.510	CW DX window
3.560	QRP CW calling frequency
3.570–3.600	RTTY/Data
3.585–3.600	Automatically-controlled data stations
3.590	RTTY/Data DX
3.790–3.800	DX window
3.845	SSTV
3.885	AM calling frequency
3.985	QRP SSB calling frequency
7.030	QRP CW calling …
List of frequencies and frequency ranges with annotated usage:
14.230	SSTV
14.233	D-SSTV
14.236	Digital Voice
14.285	QRP SSB calling frequency
14.286	AM calling frequency
14.300	Maritime Mobile Net 12PM–10PM ET
18.100–18.105	RTTY/Data
18.105–18.110	Automatically-controlled data stations
18.110	IBP/NCDXF beacons
18.1625	Digital Voice
21.060	QRP CW calling frequency
21.070–21.110	RTTY/Data
21.090–21.100	Automatically-controlled data stations
21.150	IBP/NCDXF beacons
21.340	SSTV
21.385	QRP SSB cal…