I have buyed that in .fr
looks now much better
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=638602;image)
Those mini scopes are so neat. I must get one, one day.
the restoration of them can be a adventure. But they need not a lot of space for a collection.
200Series, µTek
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/xsmiley.gif.pagespeed.ic.R8GFI-pF6f.png)
211 is a single channel 0,5MHz
212 is a two channel 0,5MHz
213 is a single channel 1MHz with onscreen DMM
214 is a two channel 0,5MHz with storage CRT
221 is a single channel 5MHz
higher numbers are the little DSO.
222 you have seen, 10MHz, the cpu clock is only 8MHz
224 is the same, but specified to 60MHz
general problem: batteries damage inside.
211 - 221 use NiCd , and when they are leaky the acid will destroy something on the board. This can grow to a hard job.
Exception is the 213, it have 2 pcs D Cells sitting in large wholes of the boards, so the acid soup flow in the downside case and there is no destroy to calculate.
222+224: they are made with smd ! The batteries are obsololete, it requires 8V lead cells to work.
CRT of all of them: obsolete, you can wait years to get one.
Specialities: µTek is made to check at higher voltages. Do not wonder to see at the little vertical button 100V/div that is no mistake !
About that the isolation class of the probes is very special, including the ground clips.
222 + 222A, 224 have isolation amplifiers, they allow higher voltage between the 2 ground clips.
Picture: 212, 213, 214, 221 and 222. (I am looking for the 211..)