Teardown: Wandel & Goltermann TKL-5 (vintage TTL-probe)

[Heiko Wagner]

Hello!

My name is Heiko and i am from Germany. I've subscribed the youtube videoblog now for a few months and Dave inspired me to do a teardown myself.
As i don't do videos, i have only fotos from it.

As in the subject, the object, which i took apart is a vintage TTL-probe from Wandel & Goltermann. I think its from the late '70s/early '80s, as one TTL-chips productiondate is week 39 in 1978.

Here the pictures together with scans from the manual and circuitdiagram:

front:



backside:



to open it, just remove the tip and push the thread to the inside:



here the disassembled probe:



Now the circuitboard  from the component side:



and the soldering side, where also some parts are:



now closeups on the parts:

first the TTLs:

as we see, one hex inverter (7404) and one monostable multivibrators with schmitt-trigger inputs (74121). As mentioned above, the 74121 dated week 39 in 1978.



now the passive components:



and finaly the 7-segment LED a Monsanto MAN-10 (*duck & cover*  ):



closeup of the MAN-10:



and powered up:



and finally the circuitdiagram, which is dated 6.77:



Maybe there is someone, who knows more about it, because i don't find anything about it on the net.
Releasedate, quantity, retailprice...

in the attachment there is the full manual, the curcuitboard and parts list with some more infos.

Hope you like it

greetings from Germany,

Heiko