The discussion of strobe lights and Harold Edgerton brought to mind his work on the "Rapatronic" shutter which was used to take photographs of early atomic tests. Here's ab it about the Rapatronic: ht

Karl, Now THAT is what I call very serious restoration work! Nice going! Steve H. verizon.net@groups.io> wrote:

The P7 phosphor has blue fluorescence but yellow-green phosphorescence. It is a long- persistence phosphor so was used in CRTs for low frequency biological signals. On a bedside patient monitor you co

The link is to a PDF document from the SPIE on glass for CRTs. It is quite thorough, even to the glass formulations: https://spie.org/samples/TT54.pdf and this link is to an article about the recyclin

Any of you ever see a hydrogen thyratron with a greenish glass top sealed to the cap? Look up 4C35A as an example. That glass is uranium glass. It is known to antique collectors as "Vaseline glass" be

Search eBay for "Variac". Here's an example of a 10A one: https://www.ebay.com/itm/Transformer-Variable-AC-Voltage-Regulator-Metered-1000w-10Amp-110V-Auto/173189420709 Not made in the US. One thst is

I have heard that the major reason that the small spool of solder in the 500-series Tek scopes was usually gone because of its silver content. A scrapper once told me that the ceramic terminal strips

I don't collect tubes, though I have a couple of unusual ones (I saved an image orthicon from the scrap heap and I have a couple of x-ray tubes). I had a Burroughs beam switching tube - they were used

A Tek 7L series spectrum analyzer for RF work (7L12 and higher) is going to be expensive if it is working and even more expensive if working and calibrated (just search eBay for Tektronix spectrum ana

Jeff, Ah - I see from the link that I gave that they were called "Compactron" tubes. Steve aol.com@groups.io> wrote:

Jeff, I have a series of various telemetry receivers - mostly DEI and Microdyne. These are all solid-state as far as I know (the ones I've opened up). I have a couple of oddball Microdyne 1100 series

I found this thread on Stack Exchange: https://electronics.stackexchange.com/questions/66853/why-is-the-circuit-board-abreviation-for-transistor-q How about "U" for integrated circuits? Steve H. wrote

Yes - Anthro was a spinoff of Tektronix. Within Tek, they built carts and the likeca for various instruments (remember Tek plotters?) and they later became a separate company. I bought an Anthro cart

Dave, Sorry, I don't know if Stanford still has a walk-in public property disposal store. My visit there was at least 20 years ago. I agree completely with you about pricing of desirable instrumentati

Those of you who live near a university or college (with an engineering department) it is worth checking to see if they have a property disposal office that is open to the public. There are amazing ba

Very large boxes to ship these. I had a surplus dealer take one apart and ship it to me in pieces. It took awhile to reassemble but it fit in a much smaller box. I also took advantage of it being in p

The mention of Nuvistors in the 1A1 reminded me. I had a 1A1 that had a bad channel. I got at a hamfest and did not look carefully at it before plugging it in the scope (a 547) and one channel was dea

I am replying in this thread as I have some recollection that the Tek 567 had Nuvistors in it. Do any of you have experience with a 567? I've heard stories that some that turned up for low prices were

This is a bit off-topic but the low proportion of women in engineering in general has made professional societies to which I belong lexaminet the question and have efforts at attracting more women. Th

My experience with Tektronix began far before I had a Tek scope. I was about 11 years old and saw advertisements in Scientific American for Tektronix oscilloscopes. I wanted a catalog to learn more ab