Würzburg Werkstatt Bild
I came across a rare Wurzburg workshop photo
Status: 4 December 2013
Viewing a German wartime workshop (Werkstatt)
Please do not copy this photo!
I found this photo among other materials when my desk was cleaned; which was, by the way, long overdue! However, I am not sure where this photo once came from.
What do we see?
My first impression, is that the working space is limited. Which might indicate that mainly small devices were to be handled. The way the two mains outlet and switch being mounted at the bench front is not according military art.
What is also interesting, is the fact that this person does not wear a military uniform but civil clothing. Was he engaged in industry?
It is most unlikely that this photo was taken in post war days, as he would have done work which was then prohibited?
My guess, this photo is about 70 years old. Because, from, say, mid 1943 the old SÜ 62 A-B module were made redundant.
Viewing the old SÜ 62A A-B module
Isn't it a beautiful example of comprehensive craftsmanship?
Its robustness should guarantee that the receiver frequency is very stable. We may even regard this being one of the most stable oscillator types of its time.
This particular module was already adapted to be tuned at Wave A or B (Wismar). Doing so must have been a hell of a job, as soldering on solid ceramics is a very special art!
Quite soon a new module was adopted, which allowed quick frequency changes within seconds, called Michael-Überlagerer. It took, nevertheless, still at least 40 to 45 minutes to switch the entire system from, for example, wave A to B or reverse (neglecting the time necessary for adapting the SÜ 62A); the bottleneck was the transmitter module known as: Lokomotive (PRST S 62).
The big apparatus on the far left-hand side is a R&S type WID - on top of it its universal power supply NWU both made by Rohde & Schwarz. In those days, by the way, was named differently (PtE = Physikalisch-techn. Entwicklungslabor Dr. Rohde & Dr. Schwarz). The big Telefunken apparatus with the many meters is a test set which type number is to be determined later. After due consideration, it seemingly is a test gear for just the two units which the technician currently is working on. Its designation: Prüfgerät PRST SÜ 62. On top of it another test set. Just visible is the 'high tension' symbol above the moving coil meter. The technician, most likely the father of the one who once gave me this photo, is doing work on the early Würzburg first local oscillator SÜ 62A. This additional test set might indicate that another rig is also in his working space, like a: (PRST S 62).
Let us secondly have a look what the PRST SÜ 62 is about, using the data sheets of the Würzburg Werkstattbuch
Cabling according to the WB Werkstattbuch
Its principle schematic
Viewing the PRST SÜ 62 from the rear
Shown is the way the two modules which are currently on the bench should be connected onto the PRST SÜ 62 test set
We notice further
Behind the test gear and also on the left-hand site we notice glass windows, which might indicate that this workshop is part of a bigger space.
Shown is the first local oscillator (Überlagerer) (old type), which is dealt with on the first photo
It is, however, not known what he actually is doing. Repairing or eventually changing from Wismar band (Bereich or Welle) A to B v.v.?
That the mixer stage (Mischstufe) is also laying on the bench might indicate that a frequency change is concerned, or the red indicated modification is being commenced
The data sheet of the R&S signal test generator type WID
The way signal test set WID works
GM stood for Grob-Messgenerator - FM for Feinmessgenerator - NQ for Normal-Quarz - M for Mischstufe - Verstärker means amplifier.
These test generator series are operating like wave-meters. It can compare an incoming signal with its internal signal source (harmonics). It is, however, also possible to use its signal output. Nevertheless, there is no provisions to define a partcular output level. Hence, it was mainly used for comparing and calibrating signals.
To be continued in due course
By Arthur O. Bauer