22 Sept 19

 From Eham Forum… Post by: WF0H on February 23, 2003… I am not sure when this started, but it was well established in the early 1950’s, which were probably the heyday of the 807 tube.  I once had a Johnson-Viking mobile rig from the late 1940’s that had an 807 final in it – a wonderful CW and AM rig, too. In the 1930s, the popular tube was the Model 45. By the late 1950’s, the tube of choice was the 6146, so it probably stared someplace in between those two eras.

8 September 19

Johnson Viking Valiant

Below are 2 pictures of  Dean – W8IM’s station

Modes: AM/CW
Bands: 160 – 10 Meters
Input Power: 200W-AM, 275W-CW
VFO: Yes
Power Supply: Internal
Final Tube(s): 3ea. 6146 parallel
Modulator: 2ea. 6146 push-pull
New Price/Year: $349.50 kit/$439.50 wired/1956-62
Size: 11.5″h x 21.0″w x 16.25″d
Approx. Weight: 73 lbs



4 September 19

The 955 Acorn

The type 955 triode “acorn tube” is a small triode thermionic valve (vacuum tube in USA) designed primarily to operate at high frequency. Although data books specify an upper limit of 400–600 MHz, some circuits may obtain gain up to about 900 MHz…… More at Wikipedia

5 September 19 – Trivia Question

The Acorn Valve

An acorn tube, or acorn valve, refers to any member of a family of VHF/UHF vacuum tubes starting just before World War II. They were named after their resemblance to the acorn, specifically due to the glass cap at one end of the tube that looked similar to the cap on an acorn. The acorn tubes found widespread use in radios and radar systems….. More at Wikipedia

1 September 19

From the NIST Website

Station Information

NIST radio station WWVB is located on the same site as NIST HF radio station WWV near Fort Collins, Colorado. The WWVB broadcasts are used by millions of people throughout North America to synchronize consumer electronic products like wall clocks, clock radios and wristwatches. In addition, WWVB may be used in other consumer timekeeping applications, such as appliances, cameras, and irrigation controllers, as well as in high level applications such as accurate time synchronization.

For more See the NIST website

31 August 19

The Cray-1 was a supercomputer designed, manufactured and marketed by Cray Research. Announced in 1975, the first Cray-1 system was installed at Los Alamos National Laboratory in 1976. Eventually, over 100 Cray-1’s were sold, making it one of the most successful supercomputers in history. It is perhaps best known for its unique shape, a relatively small C-shaped cabinet with a ring of benches around the outside covering the power supplies. 

More at Wikipedia

29 August 19

Rockwell Collins was a multinational corporation company headquartered in Cedar Rapids, Iowa providing avionics and information technology systems and services to government agencies and aircraft manufacturers. The company was acquired by United Technologies Corporation on November 27, 2018, and now operates as part of Collins Aerospace.

More at Wikipedia