Exhibits being reshuffled newly

On 15 December 2013 our Secret Communications exhibition came to a closure. Time was taken to recover from the quite stressful era.

The main time in the whole of the month December was dedicated to clearing my considerable archive backlog and also entering all details into our dBase. Just on 30 December this task was commenced and it was time to undertake something different.

On 4 January 2014 Paul and Marc came along to collect most of their artefacts. Their Volvo station car was rather overloaded.

Leaving a quite empty space behind and new plans were made for rearranging most of the exhibits. Previously quite some interesting devices were kept stored in a way that these hardly could be studied.

I might somewhere having emphasised that our collection is the result of more than forty five years of commitment. For instance, I brought home from Ebbe Pedersen (Denmark) in the late 1970s and early 1980s cars full of all sorts of devices. Among it two out of four Adcock antenna masts. Being stored on several places for decades. Also the original transport suitcases belonging to the Lo40K39 transmitter and power supply, were among it. Why not making arrangement showing these devices for the first time publically?

Luca Fusari suggested yesterday, that we should also creating a nice place for the Nachtfee apparatus. This is not easy, as Nachtfee is not a single object but a system with a lot of additional gear. Like: signal generator - pulse generators - signal modulator - the Gemse receiver, opposite to it: the simulated aircraft display system with its additional gear like time base synthesiser - FuG 25a transponder, power supplies and the interfaces. We simply have no space available for it than the one currently in use. In my perception, the current setting is optimal as it fits very well on to the circumstances. Noticing also - when for example the Nachtfee system would be placed on the two movable tables in the rear hall we would encounter all sorts of problems, like the feeding mains cables, maybe more significant: the light circumstances would be quite poor as for viewing CRT screens - dim light is favourable. And, not the rear side of Nachtfee is of interest but its front panel only; this is just the way it is displayed since.      


This page being initiated: 9 January 2014

Status: 14 June 2016


2a + 3c + 4c + 6c + 7c + 8C + 9a + 10a + 11a + 14a + 33


Small KM communication corner

Please watch the moving-coil meter on the left; apparently the Ha5K39 is being switched on in receiving mode

From left to right: Ha5K39, Ha15K42, Lo1UK35. The Ha15K42 needs some restoration and its genuine power supply is missing, although we possess somewhere an empty power supply case (box).

The Ha5K39 is in working order including its original power supply and cables.



The new telephone dedicated corner

From the far left-hand side: L01UK35 mains power supply to it, the new telephone corner.



Telephone display viewed more closely

It is evident that this new setup provides a bit less space, on the other hand the newly created Navy communication corner is having quite convenient space available.



Two out of four Adcock antenna masts belonging to the Hütte II Peiler (HF/DF) system. The dark box on the right-hand side attached to the KWEa/Peil-Hütte II receiver is containing the DF gonio-meter system. Against the wall, (from left to right) Köln E 52a - Ulm E 53b - EO 509 - Lo6K39 and Lo6L39

It is clear that originally these Adcock antenna radiators (masts) were placed at some distance from the DFing Hütte system cabin, mostly in a flat field. Interconnected by coaxial cables normally kept under the surface, as to prevent for the horizontal wave signal components as much as possible. However, occasionally the receiver hut was place in the centre of the Adcock antenna square. Some of the Lorenz DF systems operated with 6 Adcock antenna masts. However, our Hütte II goniometer is only fit with a four cable input.

The wooden provisions has been designed such that when being removed the only thing that remembers what was once done are some screw holes underneath the tabletop. I also brought home once the antenna mast top sections, but this would make it altogether 4.20 m (2 x 2.1 m) tall. Space that is not available. For understanding what the antenna system is about, this setup should do. 


Why not displaying the odd Lo40K39 suitcases too?

A good opportunity showing what these are about. Together making it a quite attractive arrangement. These were kept in store for at least thirty five years as were the Adcock antenna masts.



From left to right: Feldverstärker a, Kabelprüfgerät  Wa A 024a 252, Marine Prüfkoffer 2




 From left to right: Schwabenland RX (sadly lacking its case), NA4d (NA4/a1b = Ln27474) combined low voltage power supply (12 V) with below a 2.0 - 2.4 V battery charger. This unit was standard in most communication trucks. It could charge batteries and feeding the bureau lamp and when mains power failed it could be switched onto the existing dc battery provision. Next Ladetafel c and on the far right down the KM EN410 universal power supply to Marine receivers  


In front from left to right: the VFO and driver stage of the AS 60 transmitter (M1K); MZG2 Morsezeichengeber 2  a programmable beacon provision, it was possible in the past entering my full call-sign PA 0 AOB in Morse code; laying at its back the Schreibmax printer belonging to the Schlüssel M4 machine, in the rear its power supply (MZSS)

The big transmitter is the U-boat transmitter type S406 S/36, which can operate.




The Tonschreiber b corner, we only interchanged the position of the recorder and the spare part box. On the right-hand side the power supply to the Hagenuk Ha5K39 wireless station. The neon indicator showing that power being switched-on



In the rear room at one the movable tables on the left the V-1 auto-pilot, under the Perspex cover the Patin KZ14 gyro unit (Kurszentrale). On the far left-hand side the electrically operational Würzburg FuG 62D. At the rear wall is mounted the Siemens FM-altimeter FuG 101a



Viewing the K 12 aircraft (gyro) system, this particular type was once adapted for application in the Seehund U-boat (type 127). Even the adapted steering grip is existing (the Perspex cover replaces the original metal cover, though, allowing a vision what actually is mechanically inside). Adjacent in the rear the ZD 38 = Zeitdrucker - year of its production 1939, serial number 251 (please notice the photo further down)

This unit once was removed by the father of a friend in May 1945, when some Seehund U-boats (small two-men submarines) were laying on shore at the Hoogovens terrain in IJmuiden (he worked opposite the Noordzee kanaal at 'van Gelder Papier' factory). My friend's father once got special police house-search not long there after. Apparently they did not find the quite many items they possessed (once 5 complete systems).

In the background we are currently trying to make the lid of the Zeitdrucker 38 moveable again. This might take some time, using a lot of WD40 spray and some persistency.



The Radione station corner being re-established and is kept unchanged

At the top shelf from left to right: DR 38 (FR 38) - DR 42 transceiver - the three units at the right-hand side constituting the DR 78 station. At the lower shelf: H2L/7 = H2L7 next its universal power supply type U.O.R.I - VO34 T ≈ HMZL (these differ only in respect to filament voltage supply) All being made by Philips/NSF.



An entirely new setup

From left to right: NAPH (Netzanschluß Peiler Heinrich) power supply of the Peiler Heinrich station, whether in combination to the 'Y'-station (Benito) I don't know. Adjacent the E16EP DF receiver (actually an adapted FuG16 receiver module).

In the centre the main 120 W long distance (blind) landing beacon (left/right) type AS3 .

On the far right the Lorenz EZS 1 officially S29353. This transmitter provided one of the two beacon signals at 3000 m (VEZ) or 300 metres (HEZ = Haupteinflugzeichen) before the landing strip. The blue cable is the genuine coaxial antenna cable, the connector down on the right is the combined mains and controlling interconnection.



Siemens Rel mse 2030a audio spectrum analyser. Weighting approx. 60 kg!

This apparatus being still considered rather significant and is therefore kept on display.

It has not yet been decided where to put it, as it does not fits easily into the current room.




Not all photos have been taken and this section is showing additional impressions.



Funklandeanlage FuBl1 in its transport suitcase (FuBl 1 + EBL 2). In the centre PSU-0-B the test set to all German blind-landing gear. I guess, to most systems world wide. On the far right PQK2 a wave meter annex signal source originally meant for FuG III but also covering the same wave spectra as is having FuG 10 (FuG X)


Shown: from left to right: the dissembled Köln E52a2 which is mounted at a rotable platform, adjacent its power supply combined with a central wiring plate (BUS); next the Lo40K39d which was the common U-boat spare transmitter when their main system failed; the /blue/grey tall set it a submarine transmitter type S406 S/36; next the Main communication receiver having on top the high speed Morse tape receiver MS 5


On the far right transmitter type AS59 (in working order)



Providing a different view on the new displays

In the rear left the Liechtenstein SN2 and the three modules on the right constituting the WT40 system resting on top of their transport boxes.


Viewing in front the Zeitdrucker 38

The clamping is still maintained as we would like to ease the movements of the lid-hinge.


Viewing: the Zeitschreiber 38 information label

Telefonbau und Normalzeit


Werk Berlin

Zeitdrucker Type ZD 38

Gleichstrom   24 V

Fabr.Nr. 251  1939

This label wasn't visible before as it could not be separated from the top lid.  


On 14 January 2013



Luca Fusari asked me recently - whether the beautiful Korfu is still on display?

Of course it is.

What have been photographed firstly are the new artefact displays, neglecting the unchanged settings.

The following section is showing what other items are on display currently. Most of which was already part of our regular exhibition.



The FuG 10 (FuG X) corner

In the centre PT10 (Prüftafel of FuG 10) which could act as a testing facility as its wiring is more or less equal to most of the aircraft systems; but also representing a ground station; right of it the EZ6, the radio DF system. Combined with the FuG 10 creating a FuG 10P. On the far right-hand side the original Funkertisch of a Siebel 204 aircraft, the combined Funkpeiltochter or DF/slave compass is partly linked onto the EZ6 system, repeating the actual DF antenna vector as well as the magnetic compass (master) reading.


In front the 100 WS transmitter

On the right NS 2 (Notsender) and NS4


The 100 WS front view bordering the WH corner


The second WH corner photo

From left to the right: 10 WS on top of it showing what is inside. Next Funksprech f and adjacent a 80 WS. Right of it below a 20 WS c and on top an UKWE d1


The second WH corner photo


The third corner photo

The 15 WSE b below shown what is inside; Torn Fu b1; next a Torn Fu d2


Viewing the fourth WH corner photo

Shown: Mine detector Wien 41 with its search coil (Suchspule); a range of Feld Fu b, c, f. Torn Fu H; Feldfernschreiber  ...; GG400 motor generator (12 V 400 W, dyna-start)


The fifth WH corner photo

Torn Fu g - Torn Fu H - Dorette Kleinfunksprecher Kl.Fu.Spr. - EA 1020 - Torn Eb - Richtkreis Fu 30 - Dämpfungsmesser - Messbasis 1 m (Zeiss/Nedinsco optical range meter)


Our rarity cabinet


The radar signal search corner

From left to right: Korfu (latest version may be of late 1944 or early 1945), EO281, Naxos down under the cover the accompanied antenna scanner 


The simulated Nachtfee aircraft system corner

On the left: the entire FuG 25a IFF;  on top in the centre the FuG 16 ZY, below its Navy derivate Lo10UK39; on the table the two signal interfaces; The oscilloscope is constituting the simulated  aircraft 'order' or command display relaying the Nachtfee ground console 'order' or command; on top the universal Philips/Fluke time-base synthesiser PM 5193V (TB); on the table the 24 V power supply to FuG25a.


The Nachtfee ground console corner

Adjacent on the right its receiver Gemse.

On the far right-hand side some of the Funkhorch receivers (FuHE b - c - d)


On 17/18/19 January 2014



With the assistance of Wouter it was eventually possible to release the hinge movement by lavishly spraying WD40. All other means proved useless. Though, it is now possible to fit the top-cover-plate onto the Zeitdrucker 38 main housing again. The previous- or an earlier possessor had apparently tried once in vain to remove the top plate and broke off several screws. These remains firstly had to be removed and new threads provided. However, all being accomplished and a new artefact can be studied since. Although, we have to admit that we do not understand it principles well. Reading what is mentioned on the programming punch cards it has to do with measurements on firing artillery. As long as we do not possess a manual or other information we cannot inform you further than showing how it looks like.


Viewing the control panel on the left-hand side of the apparatus

In the upper section one of the programming punch cards being fit (not all bridges being placed, regard them hanging at the right-hand door). The other cards being piled at the bottom side. Each one for a particular operational purpose.


The Zeitdrucker 38 (ZD 38) being opened like is during operations

The white field on the inside of the flap in front is the electrical schematic of ZD 38.

During the preparations making the top lid hinge movable, I discovered that paper transport is blocked mechanically when the top lid is kept closed (down).


Showing movable table number 2 and the way it fits into the rear hall. Leaving enough room for viewing the displayed artefacts from three sides 


On 22 January 2014



Last Saturday Paul and Marc picked up their remaining artefacts and it is since possible showing how our premises looks like after reshuffling it newly.


Viewing it towards the entrance. Standing just in front of the Nachtfee ground console

On the far right quite in front the Jagdschloss radar transmitter module. Left of the blue door the Lo70KL40. On the left-hand side the G1,2 K transmitter (1,5 kWS-b). In front of the white blinds on the left the setup of Elster (DMG 2) and on the right the LiSprech 80 (Lichtsprechgerät)


Viewing from the entrance towards the main exhibition hall

Left in front the Lo70KL40 station. On the right-hand side the G1,2K or 1,5 kWS-b. The tall set in the distance is the Lorenz Lo800K35(or38) also known as  Ehrenmalsender; its transmitter stage being pulled out a bit.


At the upper glass shelf our Hülsmeyer receiver replica

We have not yet decided what to display at the open shelves left. This receiver was once being operated.

Our current new approach is showing some of our normally kept hidden artefacts. This receiver replica was made about 2004 as we commemorated that 100 years ago Christian Hülsmeyer gave his first public demonstrations.  Against to what some publically would like to pass on, Hülsmeyer was the first person who possessed a clear idea as to how it should be about! He even possessed in many countries a range of patents covering his inventions, also in Britain. He finally failed because he was not having the technique at hand to make it work effectively. His technique was quite crude, but it showed doubtless what its principles are. It took at least two decades before new attempts were undertaken. One very important notice, nearly all so-called radar inventions claims originated from serendipity in contrast to Christian Hülsmeyer who developed an idea and worked it out the best he could. Of course, lacking technical understanding - but also the techniques did not exist yet! This is even true in the 1920s. 


On 24 January 2014


Two new devices being displayed inside our glass-case (vitrine); both we got once from Graham Winbolt's collection remains.



At the upper shelf is displayed a replica of Hülsmeyer's receiver, which he might have used during his radar like demonstrations in 1904. Although, there is some indication, that he used another type of receiver. Both were, nevertheless, designed by him


The glass door being opened


Below Hülsmeyer's replica we see an optical stereo arrangement used by the Germans. Designated: Brückenraumglas, the entire case having GAF stock number Fl 38025

This artefact shows clearly that the Germans used for their aerial photography stereo viewers too. A point sometime neglected in literature.


At the glass shelf below a so-called: Streckenzug Tafel A. Likely an artillery range calculation table


This photo showing the application of a Steckenzug Tafel A behind the frontline in Russia


On 21 February 2014



After it was decided to stop temporarily the work on getting the Siemens G-Schreiber operational again, time has come to clear the rubbish and putting our Siemens Geheimschreiber type 52d on a proper display again. All sort of matters being stored where they belong. We encountered a chain of setbacks and I considered that we have a second machine which currently is still in the U.K. but should return in due course. The experiments will then be start-up again. 


The first shot shows the new setting of the "G-Schreiber" corner


Turning our camera were are viewing the AS 60 driver and modulator unit

Next to it the beautiful oscillator module of the S406 S/36. A marvellous piece of ceramic construction. This oscillator unit is of the same type used as employed in the tall transmitter in the background.



On 19 June 2014 


A lacking view front the front section of our exhibition room towards the main hall


Additionally a photo taken from the Jagdschloss radar transmitter

For this occasion, the filaments of both valves type TS 41 being supplied with 10 V. Showing it this was is without danger, as no further HT is fed onto it

When you would like to know more about Jagdschloss



On 3 October 2014

We have rearranged some apparatus of our current display


The already existing Eibsee transmitter and the Kreuzeck receiver being displayed together

We are, Deo volente, intending to extend this display with its range-display module. But, this device is still not swopped yet.


Viewing the Kreuzeck receiver and the Eibsee transmitter, both once belonging to the Jagdschloss system, from a different angle

Please consider the Jagdschloss page and the Kreuzeck page



The new set up of the Lo70KL40 (Marine Heinrich)



On 18 October 2014


The Gemse has been placed in the Jagdschloss setup.



The Gemse place between the tall Kreuzeck receiver and the Eibsee transmitter



In the original setup the Gemse IFF receiver is on the left-hand side

We are still waiting for the Ranging unit left from the Kreuzeck receiver.



Viewing it now from the Eibsee side



Seehund (127) gyro-steering system


We also made progress in respect to the reconstruction of the 'auto-pilot' (gyro-system) once belonging to Seehund 127 type mini-submarines (two-men boat), laying on shore of the Hoogovens in IJmuiden (NL) in May 1945. IJmuiden was a fortress (Festung) which surrendered days after the Army (Heer) and other German services did.

For it one first should obtain the wiring. What we eventually got are the genuine cables, albeit adapted in the late 1970s a bit.



In 1988 I swopped a working system and would always like to reconstruct an operating system (getting something different in return). It concerns an adapted, for naval applications, Siemens K 12 aircraft steering system (single axis).

The adjacent to the 'Zeitdrucker' apparatus standing 'Rudermaschine' K 12 is adapted for educational purposes in the 1970 by the previous owner (getting a Plexiglas cover) . This person, by the way, is the son of the one who de-mounted it from the Seehund mini-submarines in 1945 (5 x). Thus still, I got it from a first hand source. The Ruder-machine in front is most likely I once owned before.

Now we possess the original cables as well again; which he once especially made for me (adapted as to fit onto a square wooden plate, allowing its rotation and viewing the response of the 'ruder' arm versus a given course). It all has to be build into an operational system again. Much care should be given for lubricating the various bearings. We never should forget, that the devices are at least 70 years old.



On 11 December 2014

Our newly established corner dedicated to our recent found APS-15A

This latter apparatus is in many respect equal to what during World War Two was called by the Germans Meddo Gerät.

Secondly we show a new set-up; because we are lacking some exhibition space a wooden frame has been build as to display both the Köln E 52a and Ulm E 53 and so saving some space.



Shown is the  R-78/APS15A display



Showing it a bit from a different perspective



Below on the left-hand side is shown the Köln E 52a, on top the Ulm E 53b; right of it the Schwabenland RX

In frot we just are viewing the dismantled Köln E 52a2


Showing the previous set-up just from a different perspective



On 14 June 2016

Quite some time have been passed since my last contribution onto this particular webpage.

Browsing through it, I discovered that some exhibition changes have not yet been adopted; although, there being dealt with on other dedicated pages. But it is always thrilling taking notice from the entire exhibition context. In due course this omission should be corrected.

In 1994, I have lent out to the Imperial War Museum one of our Siemens T 52d (SFM T52d) Geheimschreiber machines.

Quite long before the centennial of the beginning of the First World War formerly known as: the Great War on 1st August 1914, the IWM started with planning and reshuffling for their main exhibition at Lambeth.

Therefore, they did not have longer room for exhibiting our G-Schreiber apparatus.

Delayed for some annoying reason, our machine has ultimately arrived yesterday, in mint shape. 



Allowing us to display a couple of machines, like might once have been the case in high level HQ communication centres

Think of Naval High Command, or that like; but also high level communications between Embassies on the European continent and their Home Office (AA) . I know, that Seyss-Inquart's command centre and Berlin had been using it for Top Secret information exchange. This is only reflecting some applicants. It is also known, that the previous type T52c had been 'broken' by Sweden's services. This interception had stopped after the introduction of type T52d. They tapped the line between Helsinki and Germany passing over Swedish Territory. 

The Dutch Government has used this type of machine as to communicate secretly between The Hague and Batavia in former Dutch East Indies, in post war days of course. 


Viewing it slightly from a different perspective


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To be continued in due course


By Arthur O. Bauer