Pinned toot

Thank you @M0YNG.

Hello everyone - I am Ramakrishnan. My callsign is VU3RDD and I live in Bangalore, India. I am interested in homebrew electronics and I mostly operate HF/CW at the moment. I have inverted V antenna for 40 and 20m bands.

I do computer programming for a living and work on low level software, cryptography and network protocols..

I have another account but i thought of separating the radio/electronics toots into a separate account.

The crystals that I thought were long lost, arrived today from aliexpress. I need to make a G3UUR crystal frequency measurement circuit now.

Friends: A humble request. Please consider not to primarily require users to be running MS Windows when you write amateur radio software:

More than one month since I ordered a bunch of 4.9152MHz crystals from aliexpress. Tracking says it has reached the home country. This is probably the first time I have lost a package from aliexpress...

Has anyone tried this audio card HAT for raspberry pi?

Looks like a great way to get some baseband signals into the Pi.

Do you earn more than 32,400USD a year?

If you do, you are the 1%. In my latest article, I give examples of ballpark ecological accounting to determine how you can offset your negative impacts on the world: carbon emissions, animal cruelty, water scarcity, waste management, and loss of biodiversity.

We can change things.

#environment #green #effectivealtruism

Spent a bit of time this weekend looking at KA7EXM power meter QEX article. I recently discovered an unopened kit that I had ordered a few years ago, so that is going to be my next project.

I have also got some crystals on my way, so a G3UUR crystal frequency test setup is also due. It also needs a 1Hz resolution frequency counter, which I don't have.

How did I miss this wonderful list of conversations by two great homebrewers?

@vu3rdd I'm relatively new to the hobby and as a programmer this shocked me. Also the proliferation of nonfree things like P25, DMR and System Fusion. Seems antithetical to the open, maker culture

The well-known author of EMRFD book shipped the CD with some very useful software, all binary programs. Someone wrote to him saying that an antivirus software was flagging one of them wrongly, so he took down that program instead of releasing the source code! Today, I was looking at an old paper on crystal filter design which referred to a software whose cost increased to $150 after a favourable review on QST. The author is long dead and with him, the software binaries too!

It is sometimes very irritating that a very free/open community like the amateur radio community mostly wrote non-free software for Windows in the past few decades (and to some extend still do). Take most of the well known analog filter design tools - they are all .EXE files.

First time my WSPR has made it across the Atlantic, from San Diego! 10678 km on 100 mW (106,780 km per Watt). SNR reported a -17 dB, which is relatively strong, as -20s are regularly seen within NA.

#wspr #hamradio #amateurradio
Screen Shot 2019-07-31 at 8.39.…

Sometimes a piece of tape is easier than updating the firmware.

The service manuals of old professional equipment are truly amazing, the schematics are shown in three different abstraction levels, every single connection is shown, waveforms at 100 different test points are drawn, every single component is listed, with step-by-step test and calibration guidelines. You can almost remove everything from the board and put it back together with a service manual.

Something that today's consumers can only dream of...

#retrocomputing #crt

I was looking at the ISRO youtube live link till 2.40AM or so, half asleep and then decided to check a few news websites to learn that the launch was called off.. Hope the next launch is during the day..

I am curious, how the launch window is decided. They say that the rest of the launch dates in July only have ~1 minute launch window but I don't quite understand what that means..

That goal of "at least one CW QSO a day" has so far been a failure. if I am lucky, I get to check-in into the local CW net in the morning. Otherwise, 40m is dead here for the past few days..

Show more

Mastodon.Radio is a community space for the Amateur (Ham) Radio community.

Come join us and talk radio, technology, and more!
We suggest you sign up with your callsign.

We have some rules, please read them, but they are basically "be nice".

This instance is sponsored by
Cheltenham Amateur Radio Association Mythic Beasts