Does it seem a lot of information on RF electronics is disappearing from the web? I remember 10 years ago, and even the late 90s there was a ton of schematics online, so many amateur radio DIY sites and even pirate radio transmitter plans. Of course geocities is gone and a lot of the yahoo groups are defunct but I recall there being a great wealth of information that now all seems to be lost to time
I was looking around for some series modulator ideas for a MW transmitter, seems simple enough and though I have my own plan going and working I wanted to see how others have built them for higher powered transmitters. There was a ton of info out there for this in the past but now all I can find is two lousy schematics and everything else class D modulation and so on. Even using duckduckgo instead of that "other" search engine, it seems most of that info is now digital dust.
Surely none of us miss those terrible animated gif art images on peoples homemade web pages in the geocities era, but these days I can only find foreign language sites containing RF engineering DIY, mostly in Russian or German.
I can translate these pages, anyone have some good foreign language sites with good schematics of modulators, RF amps, exciters, and the likes? So many of these old articles and sites need to be uploaded to the internet archive or something before we lose all this knowledge.
Scroll down and click the LU8JB picture right of Entrar, obviously you will need to translate the pages to English but a ton of transmitter designs there. You can use translate.google.com and post the link in the English side and use AUTO to detect language and click the URL to translate the entire page and links you click within it. Lots of PWM modulator designs and Class E stuff there, some classic tube stuff too. LOTS of eye candy.
Anyone have anything else? If we can get some interesting foreign links in this thread I may move or merge this to the links section.