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I made a satellite pass match maker to find satellite passes that cover two locations simultaneously. Ver…
hamradio  from twitter_favs
yesterday by 9600 Open Source SDR Web App for Everyone!
Do you want to share your SDR receiver with other amateur radio operators? Let's build a network of remotely controllable SDRs together!
sdr  softaredefinedradio  hamradio  radio  wireless 
2 days ago by cyberchucktx
HeyPhone: Cave Rescue Communications System
It is now 17 years since the original HeyPhone was produced; designed and constructed for the UK Cave Rescue Groups by John Hey, who died in 2016. The HeyPhone was a pioneering development in Cave Radio, but it can no longer be recommended for construction. The information is archived here, on this web site, for posterity (or, at least, for a while) but you are advised to seek a more modern design. Several significant products have been developed, (e.g. Système Nicola, Cave-Link) but these are semi-commercial products, and not available for home construction. One strong contender for a 'homer' to replace the original HeyPhone has to be Ian Cooper's Micro HeyPhone, which was described in the CREG Journal in 2017
hamradio  communications  wireless  rescue  emergency 
8 days ago by cyberchucktx
Building a Digital Mobile Radio Repeater Part 3: Cabling.

DMR  hamRadio  amateurRadio  from twitter
9 days ago by 9600
Low Profile, High Performing Wire Antennas for Ham Radio - Yagis NOT Required
Whether working a contest, chasing DX or enjoying a general rag chew or net, when it comes to making lots of good contacts, the single most important factor determining your fun and success is the performance of your antenna. If you have the interest, space and resources to put up a beam antenna on a rotor at a reasonable height, you should! Precisely controlling the directivity of your signal at the push of a button will be a great enhancement for your station!

That said, beams aren't everyone's best choice. A beam / rotor / tower combination isn't cheap. Depending on where you live, neighborhood permission might be tough to obtain and radiating all your signal in only one direction can be a disadvantage for nets or running a frequency. In addition, many of us enjoy the challenge, reward and satisfaction of using alternative, home brew antenna designs that can get us through the pile ups and keep our QSO rates high during contests!

The good news is that beams are just one of many good performing, HF sky wave solutions! There are some very good, low profile, neighborhood friendly antenna designs that work really well! A beam might bust through the pile ups most often, but there are some stealthy, low profile designs that will hold their own in the pile ups too!

Amateur radio is great fun when your station works well enough to make a good amount of contacts, but you'll likely lose interest pretty quickly if your antenna is little more than a glorified dummy load, eating most of the signal or radiating most of it uselessly into the ground or outer space. Choosing the right antenna for your station that works well will add tremendous enjoyment to your hobby. Whether your goal is to work as many different countries as you can, contesting or general rag chew, a good performing antenna makes all the difference!
hamradio  antenna  To-MB 
11 days ago by W6AZ
WS9V - Callsign Lookup by QRZ Ham Radio - Skip
I am in Grid EM59dl " MACOUPIN COUNTY " - about one hour away.
I use 8ea 1160ft beverages for 160/80 RX and mini 4SQ
hamradio  QRP  Decatur 
20 days ago by W6AZ
OpenRepeater Project
The OpenRepeater Project is the development of a low cost, low power, but a feature rich duplex Linux based amateur radio repeater controller using single board computers (SBCs) like the Raspberry Pi 2 and 3. 
hamradio  linux  raspberrypi 
22 days ago by masukomi
Quick and dirty hacked: A portable tracker with on and an old ICOM IC-2E.
direwolf  RaspberryPi  APRS  hamradio  from twitter_favs
24 days ago by jasiek

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