Tag Archives: nbems

New DigiVOX interface by KH6TY

Having followed Skip’s trail of development in digital communications modes from Digipan into FLdigi, I was not at all surprised to learn of this latest kit.

kit, board & circuit

KH6TY Digi VOX kit available now

P.34 of the March 2011 QST details his latest soundcard interface. You may recall the VOX interface he presented in the June 2009 QST, well this is a step beyond as this version needs NO battery or power connection. Read more in QST or on Skip’s site ( http://sites.google.com/site/kh6tyinterface/ )

Get `em while they’re HOT . . .

Reed-Solomon Identification

As I continue to try to catch up on some of this summer’s reading… I ran across this posting from the NBEMS email reflector. The author, Dave – W1HKJ is the central core of the development machine that has brought us NBEMS for Windows along with FLdigi, FLics, & FLmsg – a very comprehensive toolbox for amateur digital messaging. You should visit his website and try Continue reading

W1HKJ explains ARQ transfer time

An error correction method employed in amateur digital communication is known as Automatic Repeat reQuest (ARQ). I won’t get into those details here, but this mode can be used to ensure error-free delivery of simple messages over weak signal radio links as we often encounter in ham radio. In particular this method is available in the flarq program as part of the Narrow Band Emergency Messaging System (NBEMS) package. NBEMS provides amateur operators with the tools to operate several digital modes, regardless of Continue reading

Circuit Fun

What was that line from the movie.. “I love the smell of solder in the morning….

My trusty Ol`Weller - since 1970...

My trusty Ol`Weller - since 1970...

Call me old-school if you like, but soldering circuits is great fun. I’ve had this same soldering gun since sometime in high school, maybe 1970.?. I knock wood, but this ol`Weller has never failed to make a good joint. The proto socket is for sure to be the best way to work out details before committing to soldering components to the board – that’s the easy part. The fun is Continue reading