https://stream.echo6.co/videos/watch/a390474b-37cd-4760-ad1f-08886c23d82e Testing of a newly-built 160 metre AM transceiver at Chelsea on Port Phillip Bay near Melbourne. The receiver featured in a previous video. The transmitter is similar to the one presented here: http://www.angelfire.com/de/RadioAnarchy/ It is crystal controlled on 1843 kHz. A centre-tapped 15 volt 1A power transformer is used for modulation. Efficiency is quite high - total Tx power consumption is 1A for approx 7 watts out on peaks. The IRF510 final stage does however need to be presented with an acceptable antenna impedance otherwise distortion can appear on the output, as happened here (the switched inductor in series with the antenna has since been replaced). The transmitter's circuit is described in 'Lo Key' September 2011 - published by the CW Operators QRP Club. 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 07:13:41 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/a390474b-37cd-4760-ad1f-08886c23d82e 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.