AD5GG - Radio & Electronics Blog

0

Severe Weather Season 2017

Right now, discrete thunderstorms are exploding over Iowa, Illinois, and Missouri. Several of these storms are dropping significant hail, look like they’re threatening to spawn tornadoes, and there are a couple of Tornado Watches issued....

8

FT-991 Hardware Upgrade Kit

Final update: See my upgraded FT-991 in action here. I bought a Yaesu FT-991 transceiver last year. Shortly after that, Yaesu decided to surprise us (me) by releasing the FT-991A, for more or less...

0

Handheld Power Obsession

Or, also known as “linear units in a logarithmic world”. Among the cheap handheld radio community, especially after the release of the Baofeng BF-F8HP, there seems to be this huge obsession with RF transmit...

0

FTRestore

The other evening, I decided it’d be a good idea to update my FT-991 with the latest firmware. Aside from this being a good idea generally, to keep up with the latest and greatest...

2-FSK 0

Frequency Shift Keying (FSK)

Almost everyone has heard of FM, but not everyone has heard of FSK. Frequency Shift Keying is a modulation scheme which utilizes changes in the frequency of the carrier wave to communicate data. For...

0

Why 50 ohms?

Coaxial cables, antennas, amplifier inputs and outputs, typically have either a 50 ohm or 75 ohm characteristic impedance. Why? It all comes down to the characteristic impedance value for maximum power transfer being 30...

0

Baofeng UV-5R+ Harmonics

It seems that the ARRL and a number of individuals have been taking a serious look at harmonics and other spurious emissions from various ham transceivers, including the ubiquitous Baofeng range of handheld transceivers....

0

The WryCast

  Many moons ago, Amy and I had a nowcasting website, Facebook, and Twitter page called the “Wrycast”. It was pretty cool, however, we just let it slide since we’re both busy bees. Then I...

Editor Picks