A pleasant surprise at the International Microwave Symposium (IMS) 2009 (also see
IMS2011) show in Boston was the "Historical Booth." It had a very nice display of items from the early days of radio and radar. According to the IMS 2009 website, the items are "memorabilia from the first IMS held in Boston 50 years ago." Most displays were glass cases, so it made getting useful photographs difficult because of glare and reflections. You will see some of that in the images here. More information can be found on the
National Electronics Museum website. Barney Fife, seen in the first photo, was dutifully guarding the displays. After seeing what was included, I was glad that the show organizers decided to place him there.

In retrospect, I should have taken many more photographs of the displays and suffered through attempting to remove the glare and reflections, because a lot (maybe all) of this stuff cannot be found documented anywhere on the Internet. One item in particular I wish I had photographed was what appeared to be a specially formed section of waveguide (maybe C-Band based on size) that had been routed out of a block of wood, and then the cavity was lined with copper foil.
We've come a long way, baby!
In order to keep page loading time reasonable, I have reduced most of the images to fit on half the page. Clicking on an image will display the full-size version. Some image files are very large, but I wanted to try to retain enough resolution to be able to read the text in the images. Please contact me if you would like to use any of the images in your publication. If you use them without permission, please at least credit RFCafe.com.
Please take a few more minutes to read my report on the rest of the IMS 2009 show, "
RF Cafe Goes to Beantown."
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Literature Display - Microwave magazine, July-August 1959(?)
- QST (1959?)
- RCA Laboratories report
- RCA "Practical Analysis of Ultra High Frequency"
- "The Invention of the Travelling Wave Tube"
- IEEE "Microwave Theory and Techniques"
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Magnetron Tubes - Western Electric 725 X-Band Magnetron
- Western Electric 720BY Magnetron
- Peak Power = 1 MW @ 2.8 GHz
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Dr. Harold A. Zahl The VT-158 Tube and the TPS-3 Radar Large display of patents, photos, manuals, and an example of the VT-158 tube.
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VT-158 600 MHz WWII Radar Transmitting Tube
- Developed at Camp Evans by Dr. Harold A. Zahl for the TPS-3 radar
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Radarange Mark VI (Amana is a division of Raytheon) The klystron is sitting to the left of the oven.
|  Unfortunately, I do not have any information on this display of tubes and waveguide
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