End of the 60`s was the time of the first full transistor Mini Tek Scopes
![Azn ^-^](https://www.eevblog.com/forum/Smileys/default/azn.gif)
Fast was still a tube Tek, but something up to 5mc was possible.
SONY Tek Type 323, build 1967.
A single Beam portable with recharchable Batteries and a little transformer to load that. 3kg
The little Tek was in the catalog listed to 925 us$ , too much for a radio servive shop. So they are still rare in the market.
Highest quality inside, all is golden, all transistors are in sockets. A 323 use 1,6 Watts from the Battery, so it can work a very long time.
![](http://www.wellenkino.de/323/323.jpg)
ten years later Tek made the 200 series, very expensive Mini-Tek portables.
221 is a single channel 5MHz
212 is a 2 channels 0,5MHz
The little 213 is a single channel 1MHz and includes a very exactly RMS onscreen multimeter what can read voltage directly from the probe.
Tek 221, 212, 213
![](http://www.wellenkino.de/bilder/mini.jpg)
There are also: Tek 214, is a 2 channel 0,5 MHz Storage Tek,
and 211, what is a half 212. I do not own the both, still searching to get them
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
size relations
![Phew :phew:](https://www.eevblog.com/forum/Smileys/default/phew.gif)
221 on a 565![](http://www.wellenkino.de/221/221-2.jpg)
greetings
Martin