Over the years this site has evolved from the Old Tube Radio Network’s database of vintage tube-type Citizens Band radios to become an extensive repository of information on many makes and models of commercial and amateur radio and electronics equipment. The information contained in this site is...
General Radio Company General Radiotelephone Gladding Corp. Globe Electronics Golden Eagle RF Amplifiers Gonset Gotham Antennas Grundig HAL Communications Corp Hallicrafters Hallmark Hameg Instruments Hammarlund Hamtronics Handic Hansen Electronics Harvey Wells Heathkit Henry Radio Hewlett Packard HP Hunt Corp...
and then go out and find your treasure, or find a tube guru you can trust and purchase your NOS tubes from them. If digging through boxes of dusty tubes at a hamfest is part of the fun, then you will quickly get to
The landscape has changed considerably from the time when these headphones were still the “top-of-the-range” of the respective brands. Back then, headphone amplifiers were very scarce, and one of the problems that people had with these headphones is that they don’t run very well from an...
Thiotaurine: 220 mg of hypotaurine (2 mmol) was placed in a ground-cap tube topped with reflux coolant and dissolved in 1 mL 0.2 N NaOH, and 70 mg of finely dispersed elemental sulfur and 20 mL of ethanol were added. The reaction mixture was refluxed with ethanol. After 30 min boiling...
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