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2. Tuned radio frequency receiver - Wikipedia

   en.wikipedia.org/wiki/Tuned_radio_frequency_receiver

   This 1920s TRF radio manufactured by Signal is constructed on a breadboard Tuning a TRF receiver, like this 5 tube Neutrodyne set from 1924 with two stages of RF amplification, was a complicated process. The three tuned circuits, controlled by the 3 large knobs, had to be tuned in unison to the new station.

3. Antique radio - Wikipedia

   en.wikipedia.org/wiki/Antique_radio

   Today's radios are usually uneconomical to repair because mass production and technological improvements in numerous areas have made them so inexpensive to buy, while the cost of human labor and workshop overheads have increased greatly in comparison. Typical insides of an antique radio, showing the vacuum tubes.

4. Vintage amateur radio - Wikipedia

   en.wikipedia.org/wiki/Vintage_amateur_radio

   Collins S-Line, featuring separate power supply, receiver, transmitter, and speaker console, c. 1960s. Amateur radio equipment of past eras like the 1940s, 50s, and 60s that are separate vacuum tube transmitters and receivers (unlike modern transceivers) are an object of nostalgia, and many see rehabilitation and on-air use by enthusiasts. [18 ...

5. Texas Longhorns make historic Frank Erwin Center items ... - AOL

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6. Texas wants to buy surplus border wall parts but U.S ... - AOL

   www.aol.com/news/texas-wants-buy-surplus-border...

   Texas Lt. Gov. Dan Patrick said U.S.-owned border wall materials, which were available for sale, were pulled from an Arizona auction at the government's request. The Lonestar State had shown ...

7. Radio receiver - Wikipedia

   en.wikipedia.org/wiki/Radio_receiver

   The Neutrodyne receiver, invented in 1922 by Louis Hazeltine, [133] [134] was a TRF receiver with a "neutralizing" circuit added to each radio amplification stage to cancel the feedback to prevent the oscillations which caused the annoying whistles in the TRF.

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9. Unusual eBay listings - Wikipedia

   en.wikipedia.org/wiki/Unusual_eBay_listings

   The first auction ended on June 5, 2006, with a winning bid of US$5,000,310. However, the sale was not completed, and the fort and lands surrounding it remain for sale and have been relisted on the site several times since. [10] [11] In October 2008, amidst the 2008–2011 Icelandic financial crisis, one seller put up Iceland for sale. The ...