Perusing through old piles of electronics magazines I came across the following. If you have anything of this sort, send it to me and it will be added! At the end, I have included a number of old Tek ads.
On the cover of the Dutch "Radio Bulletin" I found three classic Teks.
The caption to the cover photo reads: "Part of the information processing machines at the Radio Research Station in Slough, installed to store, select and process data coming from the English-American Ariel II sattelite, when it will be launched." The chap with the Tek 555, Type H and Type CA is obviously checking to see wheter the transistor arrays of the machine in the background are not letting him down.
Addittionally, the Radio Bulletin of that month featured an editorial on the subject of audio power amplifiers, titled: "How many watts is 10 watts?" (It appears we still don't know.... ) as well as application notes on the ECLL800, the grandfather of all STK modules.
The caption reads: "Using a frequency meter, a technician working for Telefunken tweaks the one hundred channel transmitter FuG7a, whereby the output power is measured with an absorption resistor." (Whatever that may be...) In the background, next to a small oscilloscope that looks to be of Philips make, [Stop press! I now know what scope this is. It is indeed a little Philips, it is called GM 5655 and I have one! This little service scope is very different from the Teks of the era. It is not calibrated, has AC-coupling only, a bandwidth of about 150 kHz and an input impedance of less than 100 kOhm. It is also equipped with a grand total of 8 tubes, and is.... Small and Light! ] we see a Tek 515A. (The giveaway is the 'swp mag on' neon light that the 515 does not have. Don't worry: you can't see it but I have the original and can.)
The Radio Bulletin of that month featured a little column memorising Prof. dr. H. Yagi, as well as a DIY lab power supply: 0-20 volts and 0-200 mA using a TF 80 series regulator transistor. To protect the (expensive?) transistor, the output was of course, fused. The Siemens-made transistor, it is interesting to note, featured a Tjmax of 75 degrees C. My data book states that it is obsolete. :)
Radio Bulletin, for its special on colour television, even went so far this month as to have its cover printed in colour. The scope, this time, neatly displaying what looks suspiciously much like the calibrator waveform, is a 533A or a 543A. I think this must be a 533A judging by the height of the displayed waveform. It is equipped with a type CA plugin.
The caption reads: "Blaupunkt in Hildesheim started early on the development of colour television receivers. Here, we see their colour TV lab."
At the time, EL34's, New In Box, changed hands for only NLG 5.95. :(
The following are some old ads for Teks. Contributed by Bernard Tichit.
In this advert for the 545B we are made aware of the new, improved CRT from Tektronix. This is the same CRT that we find in the 543B, the 544, 546 and the 547.
The very last, most complete, and probably the best 500 series scope, the 547 that is presented in this ad features the beautiful 'display switching' feature, which, as far as I know, is featured on no other 500 series scope. At 50 MHz, the bandwidth of this machine also represents the top of the '540' line.
In this ad, the 564B is presented, the successor to the 564. As far as I am aware, there never was a 564A, so the 'B' designation must have been chosen to make the machine look competitive to the HP 141B of the time, that also had a rectangular screen.. The scope shown is equipped with a 3A6 amp and a 3B3 timebase.
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