When disaster strikes, you want to be able to communicate by both receiving and distributing information to others. You may need to call 9-1-1 for assistance, locate friends or family, or let loved ones...
Yesterday I received my Raspberry Pi. After some testing I decided to try if it was possible to install a webserver on the pi. The answer is yes! I chose nginx because of its...
1. Don’t rely upon 44 Net/AMPRNet for connectivity. It’s no substitute for building out your local RF links or at least independent internet links. It’s simply too unpredictable long term and a major SPF...
Starting with the EMRFD Fig 2.57 amplifier as a base, you can measure input returnloss using a return loss bridge. Return loss can be translated into VSWR and impedance. If the return loss is...
ere is a very clean way of assembling RCA plugs with RG-188 coax cable. These cables are used throughout with my version of the QST spectrum analyzer, which he built exclusively with “ugly” methods....
One of my favorite circuits uses a bipolar transistor with two forms of negative feedback. One is parallel feedback in the form of a resistance from the output collector back to the input base....
I (W3LPL) use separate phased Beverage arrays on 160M, 80M and 40M. If u plan to use a simple beverage ant, as opposed to phased beverages, u can certainly use a 580′ ant on...
Some friends and I have been talking about dong a camping trip, and I decided this would be a good opportunity to try some portable ops with an end-fed half wave antenna. I’ve been...
There are so many aspects of digital TV to understand. But it’s not that hard to figure out when someone takes the time to explain it. Analog TV Analog TV is what we have...
This article will help you understand how the world of audio and video media equipment has changed, and why you don’t have to get that third mortgage on the house to own a top...
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