This entire video is really excellent. Thank you Helge!
Once again, he shows us how to do it -- how to homebrew a useful rig, and how to put it on the air from the field. POTA and SOTA operators take note!
His receiver is direct conversion! FB.
I was delighted to finally see IRF510 FETs used the way they are supposed to be used (in the power supply).
Helge's creation of 250 volts DC from a 12 volt battery is both ingenious and inspiring.
His use of Altoids tins was just great and will be appreciated by GQRP.
I really liked how Helge handled the need for CW T/R frequency shift. FB.
His generation of sidetone was also great and very creative.
I did something similar with my ET-2 transceiver, but Helge had clearly gone beyond this.
Thank you Helge!
Slightly off topic, but worth mentioning a July 2026 IEEE Spectrum article that discusses how AI can help with RF circuit design, something it calls a most difficult dark art. The article goes on to describe how AI is being used to design efficient RF ICs operating at 28 GHz. Lots of iterations result in some 'truly wild-looking yet efficient designs' that carbon-based entities wouldn't have thought of. Online at https://spectrum.ieee.org/ai-radio-chip-design
ReplyDeleteAside from the brilliance going on in those Mint Tins, how refreshing to see an alternative to the usual End Fed Long Wires for portable antennas.
ReplyDeleteNice work Helge.
73
Tony G4WIF
Very cool project and innovative circuit design. Well Done Helge!
ReplyDelete