following the desire of Yago I open this tread about the restoration of vintage Tek scopes.
Story. I have collected and restoratet a lot of them in years of work and study.
Electronics is not my job, I am a sheet metal worker. But from kids time - solding !
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
I will start with pictures from some nice old Tek, restoration reports will follow soon (also that is work ..)
You can sort old Tek by numbering.
200 series are little portables, cold.
300 series are mostly SONY-Tek made in japan, mostly they are portables also
400 series are compact scopes for dayly work, mostly cold, some older of them have tubes or nuvistors also
500 series are Classic Tek, very glowing, some of them use plugins.
600 series: also , I know only one.
2000 series: modern compact scopes, some of them made in UK
5000 series: the small laboratory class with plugins, cold
7000 series: the high laboratory class with plugins, cold
Begin.
Tek 310A is a "service scope" from the late 50`s, made in USA. there are 33 tubes glowing inside, the bandwith of that single beam scope is 4MHz cal.
It needs 175 Watts to work. They was oftenly in use for the service of glowing computers by IBM. A special fun is the foldet chassis technology, you can open that scope like a book. There is no cards inside, all is soldet in ceramic strips.
2x Tek310A
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
![](http://www.wellenkino.de/310A/310a.jpg)
Remember: For soldering ceramic strips is a special solder to use with 3% silver. Every Tek oldy have a little roll inside, for repairs.
Tek 305 DMM
is a 5MHz SONY-Tek, Single Beam portable 2 Channels + autorange multimeter. It have recharchable batterys inside. The multimeter have a own DC-DC converter, so it is earth-free. When no button ofthe multimeter is pressed you can read the voltage of the battery.
![](http://www.wellenkino.de/305DMM/1.jpg)
![](http://www.wellenkino.de/305DMM/2.jpg)
All transistors inside are in sockets, not soldet.
Tek 422, a Classic.
Type 422 is around 1965 made, a 15MHz single beam 2 channels Tek in MIL quality. Early 422 have nuvistor inputs, later changed to Fet. In the high voltage area are glowing rectifiers, the rest of the scope is cold. The is no fan, no wholes, so a 422 looks inside always like brandnew from production. And most what you see is golden.... the quality of this instrument is amazing !
There was a option battery pack, usind 20 pcs. of the large D-cells to work 4 hours portable. A 422 eat arout 100 Watts.
![](http://www.wellenkino.de/422/422.jpg)
Tek 453, 453A, 454, 454A
453 and 453A are 50 MHz, 454 and 454A are 150 MHz Classic Tek scopes in MIL quality. See 422, early use nuvistor inputs, later use Fet- and in the High voltage are little rectifier tubes 5642, the rest is cold. They have a fan and must be cleaned inside yearly.
This is my 453, on a scope mobil K212
![](http://www.wellenkino.de/453/453.jpg)
to be continued with 500 series.
greetings
Martin