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Diodes as DSB transmitter finals: A high level balanced modulator Is it possible to be detected with a transmitter that has no final power amplifier transistor? To find out I made a high level balanced modulator using a string of 1N4148 diodes. Because digital modes are very efficient with low power I thought I'd try WSPR. With lots of audio and RF power going into this balanced modulator with any luck I'd get sufficient DSB for the signal to be detected somewhere. This is what I did on 7 MHz. You can see the results in the video below.   Disclosure: I receive a small commission from items purchased through links on this site. Items were chosen for likely usefulness and a satisfaction rating of 4/5 or better.

Books by VK3YE Ham Radio Get Started (USA) Australian Ham Radio Handbook (Aust) Hand-carried QRP Antennas More Hand-carried QRP Antennas 99 things you can do with Amateur Radio Getting back into Amateur Radio Minimum QRP Illustrated International Ham Radio Dictionary Make your Passion Pay (ebook writing)   All material on this site (c) Peter Parker VK3YE 1997 - 2024. Material may not be reproduced without permission. Read privacy policy.