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Harlan Andersson, computer pioneer and co-founder of Digital Equipment Corp.A native of my town, Freeport ILCategory: Historic
- Robert Nickels (ranickels), 02/09/2019
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The Case of the Phantom Voltage“When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth.”Category: Technical
- Robert Nickels (ranickels), 02/08/2019
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The Solvay Conference, founded by the Belgian industrialist Ernest Solvay in 1912, was considered a turning point in the world of physics. Located in Brussels, the conferences were devoted to outstanding preeminent open problems in both physics and chemistry. The most famous conference was the October 1927 Fifth Solvay International Conference on Electrons and Photons, where the world’s most... READ MORE
- Robert Nickels (ranickels), 12/27/2018
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Heathkit Singlebanders...cheapest SSB radio made? Or just one of the best?Slightly insane about singlebanders...Category: Vintage Ham Radio
- Robert Nickels (ranickels), 12/17/2018
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Astro...Don Stoner's legacyHow many of these rare transceivers have you seen?Category: Vintage Ham Radio
- Robert Nickels (ranickels), 12/09/2018
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When an engineer at Heathkit in 1962 turned his attention to designing a replacement for the somewhat flawed DX-40 novice transmitter, little would he have expected the DX-60 to remain in the Heathkit catalog for 14 years. From the new solid-state power supply to the streamlined apeperance and dependable performace, the new transmitter was instantly popular with novices who had t... READ MORE
- Robert Nickels (ranickels), 12/09/2018
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Epson programmable oscillators are a good substitute for quartz crystals in many applications, but they're a bit different to use. First, they are active devices that require DC power, typically 5 volts at 45mA. Second, like all ICs they are easily damaged by static and voltages that exceed the design limits. Finally they are in DIP packates that are i... READ MORE
- Robert Nickels (ranickels), 12/08/2018
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Programmable Oscillators - the modern day "rock"Cheaper and more accurate and stable than the old typeCategory: Crystal Replacement
- Robert Nickels (ranickels), 12/06/2018
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The first audio amplififer I made (that worked) used a single 6V6 to amplify the output of a regenerative receiver. Ever since they've been my idea of what a good audio tube should be and with a big speaker mounted on a piece of plywood, a 6V6 will produce "room filling volume" as the magazine articles fo the day said. But as my music tastes grew acousti... READ MORE
- Robert Nickels (ranickels), 12/03/2018
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Does the VERSA-TR protect my receiver while transmitting?An important question - and the answer is YES!Category: VERSA-TR Information
- Robert Nickels (ranickels), 11/29/2018
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