hamradio

cross-posted from: lemmy.world/post/14642252...

Simple question that for some reason is difficult to find an answer to

cross-posted from: lemmy.sdf.org/post/9321551...

Granted, I’m new to ham, but I haven’t seen a DIY j-pole like this with an element in the middle tuned for a different band. All the diagrams I’ve seen show that the 1/4 wave element (the parasitic element?) is supposed to cancel out the bottom part of the 3/4 wave (driven?) element....

Attempt at embedding video...

cross-posted from: lemmy.sdf.org/post/7646743...

This is at least apparent for what I’m observing in my country on the Southern tip of Africa. The reason seems to be that VarAC provides most of the functions that JS8Call already provides (apart from the open source), and then provides a lot of usability improvements as well as transmitting images, documents, faster speed,...

Found this to be a pretty neat visualization. I’m horrid at morse but this visual representation helps an awful lot.

Is there a portable civilian device that allows for short to medium range (10 miles or so) that would allow for 128 or 256 bit encrypted data bursts, and if so, what level certification would one need to go about for using it legally in the US? I’m imagining a data burst to convey less than 1 MB of data with an accompanying...

I’m not usually one to repost/post memes…but its almost believable

I can’t hit the local analog repeaters without using the higher power on my HTX242 (yeah it’s old but it’s what I got), the HT I have is DMR (and analog) but I would like to use low power DMR to make the battery last longer. I want to do something like this (see pic). Anyone done something similar?...

I’m going to try building a couple of pvc/measuring tape Yagis, one for 2m and one for 70cm. I have a basic understanding that the satellite (going to try ISS voice first) will be at a certain compass direction and angle above horizon. I think my main question is the beacon. I tune to the beacon signal and start hunting for...

cross-posted from: lemmy.ml/post/1519718...

Hello everyone....

If it’s not too muddy, I plan on going out to a nearby park and operating portable on emergency power by myself or maybe with a buddy. If it is muddy, I’ll try setting up in my backyard. I’m hoping to get a lot of good CW practice in!...

KN6QQW put together a great slideshow from the Net Control trailer at the 2023 Mountains 2 Beach Marathon in Ventura County earlier this year, and it's on Conejo Valley Amateur Radio Club's Youtube channel now. Take a look!...

https://lemmy.ml/pictrs/image/4a7b177b-1a60-4a3a-b2a6-e5172e8bbc42.jpeg...

These days there are lots of web-connected software defined radio receivers around the world. Back in 1995 I built a web-controlled shortwave radio web site using my Drake R8, a SoundBlaster sound card and NetBSD Unix. You can still see what it looked like with the Wayback Machine,...

If anyone would like to join an amateur radio lemmy instance or post to an amateur radio specific community, https://lemmy.radio has been set up.

They’re active from Ducie Island right now. I’ve only managed to pick them up on 20m so far.

This is my project and someone pointed out that it might be good to jitter the points by some set amount to help with privacy concerns some people might have. I want to know what the ham community thinks....

SOTA was the biggest reason I got into amateur radio. Love mixing radio/tech with getting out in the fresh air.

I love playing with packet, and I love playing with APRS. So how do I decide?...