Make sure to update your Meshtastic devices to at least 2.6.2 or newer!
"This attack does not require authentication or user interaction, as long as the target device rebroadcasts packets on the default channel."
Just worked TX9A in Austral Islands (Gridsquare: BG56FP / distance: 16635.5 km) on 20m #hamr #wavelog #IOTA OC-152
@hamchallenge #HC07S
A fellow fediham @mcdanlj is activating US-2755. He's trying for (his first?) CW activation! Go say hi if you can.
Franklin County EMA will be having a **General level** ham radio class to be offered on Wednesday evenings from 6-8PM for 8 weeks IN PERSON, if they can get 10 or more people signed up for the class.
The start date for the class is undetermined at this point while they are trying to find enough people interested in it to hold the class.
If you are interested, please email: Mike.Myers@franklincountyohio.gov
*Mott Given, KE8HWY*
"Tuesday" has hit Tumbler Ridge:
Wildfires cause communication outage across Tumbler Ridge
“Communications are down in all of Tumbler Ridge due to wildfires,” the post reads. “This includes cell and traditional internet services, so please take care and plan accordingly. Many businesses in town are cash-only.”
https://energeticcity.ca/2025/05/01/wildfires-cause-communication-outage-across-tumbler-ridge/
This is why we prep. #GetPrepared #Prepping #TuesdayPrepper #AmateurRadio #hamradio #hamr
Amazing radio club news letter. 6 issues/year. Cost: $0 (and no tariffs).
https://ve7sar.blogspot.com/2025/04/the-communicator-may-june-2025.html
I don't have one of Callum's antennas but I kinda want one. I do watch a lot of his YouTubations (a LOT) and I get a good vibe from the guy - no crazy promises. Hope you have fun with it when you get it!
Seems we can see the power outtage in Spain (https://en.wikipedia.org/wiki/2025_European_power_outage) also in ham radio (see picture from https://pskreporter.info)
I guess we need to stock more batteries...
Wonder how ham radio emergency services are working there. Maybe @notfunk can get some insights after the situation is over.
My beautiful bride gave me permission to go out again today, and most of my gear was still in the car from Friday's adventure, so I loaded up the missing bits and set up on a State Trail for some #ParksOnTheAir.
I got there around 16:30Z, and hunted my first park by 17:07.
Sadly, the bands were not very cooperative today.
A little over three hours later, had 105 contacts in the log and it was time to pack up and head back home.
#POTA #HamR #HamRadio #AmateurRadio #AmateurFunk #RadioAmatori
I had a scheduled maintenance window at work Friday evening, so I knocked off early Friday afternoon and headed to a park for some #ParksOnTheAir.
I got there around 20:30Z, and hunted my first park by 20:57.
I happened to be there when midnight UTC hit, so I was rewarded with a fresh pileup.
By 00:17Z, I had worked the pileup and needed to pack up in order to get back to work in time for that maintenance window.
Narrow band SSB never took off. Maybe because the big manufacturers never included it and we all know all ham radio operators are now appliance operators.
https://www.qsl.net/vk5br/TransmissionSystems/NarBandVoice.htm
Adding parallel circuit allows for the Lambda Diode to oscillate at a frequency determined by the LC resonance frequency. The result is an absolutely beautiful sine wave 
Note how the oscillation starts, once the supply voltage crosses where the current starts to decrease, ending up at the ‘negative resistance’ portion of its characteristic.
This is likely the easiest and most clean oscillator I ever built 
I wonder if you can use a crystal or crystal f it would get damaged from the drive level 
Maybe one of those vintage ones..
The ‘Lambda Diode’ circuit, made from two J-FETs (one P- and one N-Channel) exhibits ‘negative resistance’ and has a ‘hysteresis’ curve when viewed on a curve tracer. A bit like a ‘tunnel diode’, actually.
Circuits like these were a common way to make an oscillator from just a few components, as my next post will show.
I always end up using my analogue #Hameg scope for curve tracing in X-Y mode, it works a lot better than any of the digital scopes I have 
In fact, I have yet to experience a digital scope with even a half-decent X-Y mode..
Thanks for the inspiration @va3db 
We might have skipped the valve/tube era if not for those pesky kids!
https://earlyradiohistory.us/1924cry.htm
I tried lesson 2 on LCWO and increasing from 2 to 3 characters at 20 WPM for 1 minute. Oof. That's going to take me a while. I will start off great, but then I'll miss a character... I'll get back on track, but the next character I miss, I will go completely off the rails and can't recover.
For 2 characters, I went 2 minutes with only a single error. So, I went for the next lesson and nope. I tried that a few times. Now, I'll go to Morse Mania and practice on that app for a few minutes.
Good thing people with ADHD have auditory processing issues... that'll help me. /s
Day one of camping trip to Sussex to bag the small Marilyns in the south east. Five different hills for a total of 5 SOTA points. I think 
Chanctonbury Ring was my favourite. Quiet ham bands. #amateurradio #hamr
If you're going to be in the car (locally), what do you normally do? Have your radio scan your fave repeaters? Let it scan all the ham frequencies to see what you can get? Or do you pick a frequency that's where people can "find" you. Even if you're not mobile, do you pick a "favourite" for when you just want to do simplex?
(Gridsquare: CN88PH / distance: 2489.2 mi) on 20m using CW 
