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Our picks
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RF Line of Site tool
WA8AHZ posted a link in Propagation & solar weather,
The RF Line-of-Sight tool allows users to easily drag-and-drop locations and obtain point-to-point line-of-sight information anywhere using Google Maps. This map is useful in planning and troubleshooting cellular networks and Amateur Radio repeaters-
- 0 replies
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Amateur Radio License Map
K3MRI posted a link in Logging,
A great tool to lookup your amateur radio 'neighbors'.-
- 3 replies
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New radio installed on ISS
K3MRI posted a topic in Satellite & EME,
An interesting article on the new Kenwood 710G installed on the ISS.
http://k0lwc.com/new-ham-radio-onboard-the-iss-is-on-the-air/
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- 0 replies
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Sigidwiki.com
K3MRI posted a link in CW & Digital Resources,
The signals listed on this page are used by and sometimes created by amateur radio enthusiasts and operators, including many experimental digital modes. You can find plenty of these signals in amateur frequency bands.
Click the name of a signal to see more detailed information, possible decoding, and additional sound and waterfall samples.-
- 0 replies
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Raspberry Pi, Arduino, Microcontrollers
KN4GDX posted a topic in Ham topics in general,
https://hamprojects.wordpress.com/2020/09/06/raspberry-pi-for-ham-radio/
I'm not sure if this topic has been covered elsewhere.
The above link provides a set of tutorials on virtually every aspect of RPi use by hams today with emphasis on setup and use of a variety of common apps such as WSJT-X, FLDigi, etc. Including discussion of SSH, Putty, etc.
It is truly an A to Z tutorial. I highly recommend downloading all the sections, seven in all; ~15MB.
If you have never powered a RPi, or plugged in a mouse, this will get you going. If you are a power user (not me, I'm just learning!), you will find some new and challenging applications.
Bruce,
KN4GDX-
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- 0 replies
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First voice transmission
K3MRI posted a topic in Nostalgia & History,
It happened in Maryland, USA in 1900, just south of Washington D.C.-
- 1 reply
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Basil antennas
K3MRI posted a gallery image in Member galleries,
Decided to use my VHF antennas to grow some basil for my wife's amazing pesto sauce.-
- 0 replies
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The Official U.S. Time
K3MRI posted a link in Other software applications,
HOW IT WORKS
When a user connects to www.time.gov on a computer or mobile device, the Javascript in the client's browser checks the local clock on the device and then requests the time from a NIST server, which has been synchronized with UTC(NIST). When the packets containing the NIST time stamp arrive at the client's browser, the device clock is checked again and compared to the first check of the local clock. The result is a measurement the round-trip delay of requesting/receiving the time stamp. It is estimated that one-half of the round-trip delay happens in each direction. The time on the clocks shown on the web page have been corrected for the estimated one-way path delay of the timestamp from the server to the client and the server delay. Your device's clock is also shown, with the error compared to NIST time.-
- 0 replies
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What would you buy with $10,000
K3MRI posted a topic in Anything else you want to buy,
Just curious what people would put on their wishlist if they were given a US $10,000 gift certificate to buy kit or single item to add to their shack? What would you spend it on??-
- 9 replies
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WWVB clocks
K3MRI posted a topic in Ham topics in general,
I just bought two analog WWV clocks. I'm not having great joy. In trying to debug, I came across an interesting manual published about a decade ago by the Federal Government. It is a recommendations manual for manufacturers. I thought I would post it because it offers interesting insight into how the WWV system works.
GOVPUB-C13-71f9d4fb5d44634208278dab58e0be09.pdf-
- 1 reply
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Latest gear posted for reviews
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AnyTone AT-D878UV
By: K7FLA · 02/10/2020 -
Comet GP-3
By: K7FLA · 02/10/2020 -
West Mountain Radio Battery Boost Regulator
By: W4DOI · 10/16/2019 -
10-80M ALPHA DX EMCOMM Antenna For Portable HF
By: K3MRI · 01/04/2020
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