https://stream.echo6.co/videos/watch/890af778-bfb2-4302-8919-877fd54ff7cb Low interference potential devices are small radio transmitters that can be used without a licence on certain frequencies because they are unlikely to interfere with other users. Details of frequencies and power limits here: http://www.acma.gov.au/WEB/STANDARD/pc=PC_1278 but note that regulations vary between countries. This video is a range test of a class licensed LIPD FM transmitter operating in the 36.6 - 37 MHz band. The transmitter has just three transistors: FM modulator, 18.4 MHz crystal oscillator and frequency doubler. Output power was 10 - 20 milliwatts to a vertical dipole antenna. The results were successful. A range of about 500 metres was achieved with low power. An increase to the 100mW legal limit would likely increase this distance to about 1 - 2km. PS: If you liked this video please consider supporting Amateur Radio VK3YE by: Subscribing on YouTube, Checking my books page at https://books.vk3ye.com, Shopping on Amazon via: https://amzn.to/3iiDQXv, or, Shopping on eBay via: https://ebay.us/i9DuWP (then if you buy something I'll get a small commission at no cost to you) Sat, 09 May 2026 09:24:34 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/890af778-bfb2-4302-8919-877fd54ff7cb All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.