The resulting rig has turned out rather better than expected and happily delivers w peaks for long duty cycles of 15 minutes and more. To achieve that, I have provided an option to feed a higher voltage supply to their linear amplifier boards using a PSU adjustable from around 21v to 32v at 6A. The same approach has been used with the Cam. A good compromise between expelling enough hot air and not being too noisy seems to be 9 or 10 volts so a series resistor is used to reduce voltage. In the photo below, the front-panel is to the left and rear to the right. The Cam came with a trimmer capacitor and tuned between around 1.
Crystal Radios, AM Transmitters Good Prep for Amateur License
Crystal Radios, AM Transmitters Good Prep for Amateur License | ventemaisonmontpellier.info
AM broadcasting is a radio broadcasting technology, which employs amplitude modulation AM transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave also known as "AM band" transmissions, but also on the longwave and shortwave radio bands. The earliest experimental AM transmissions began in the early s. However, widespread AM broadcasting was not established until the s, following the development of vacuum tube receivers and transmitters.
Jump to navigation. The Commission receives tens of thousands of inquiries annually from individuals and groups wishing to start a "low power" or "micro power" radio station for local broadcasts AM or FM. The Audio Division has assembled this general information to answer some of the more commonly received questions on this subject. The next four sections cover the permitted forms of unlicensed operation in the AM band to kHz and FM band 88 to MHz , and explain the penalties which may be assessed against those forms of unlicensed operation which do not fall within the permitted forms of unlicensed operation. Unlicensed operation on the AM and FM radio broadcast bands is permitted for some extremely low powered devices covered under Part 15 of the FCC's rules.
Have you ever wanted to listen to modern music or old-time radio broadcasts on your vintage radio? Now you can! It can broadcast anywhere on the normal AM radio band and it accepts ordinary audio input. Just plug in your CD player or iPod, fire up the Li'l 7, and hear your favorite music playing on an antique radio anywhere in your house.