F101 Voodoo Radarmonitor

From a McDonnel F101 Voodoo came the following sample that I got from a customer back then, with a request to try to bring it back to life somehow.
The thing I’m writing about was a black cylinder about 30 centimeters long and about 20 centimeters across. On one end face of the cylinder was a picture surface as seen from an oscilloscope, with a rotatable scale ring with a 0 to 360 degrees angle label.
The customer told me it was the cockpit radar of a Starfighter jet. Then I began to research what turned out to be relatively expensive at that time, in the mid-90s, especially since the Internet did not yet exist in the form and diversity as it exists today.

picsource: Wikipedia

But at least I found out that the part was really the board monitor of the radar system of an airplane. Namely to the radar monitor of a McDonnel F101.
A twin-engine fighter aircraft of the 50s cold war US Air Force.
In any case, the part came from this plane – wherever the customer had it from. And he asked me if I had any chance of getting it up and running. He meant that he wanted to see the famous, rotating light stroke on the screen.
At that time, I could not find any information or documentation on the part, how to connect the tangle of cables over cables, which came out of the device …

 
frontview of the monitor

So I started dismantling. Several miniature electron tubes, transformers and many smaller tubes with bobbins with immersion cores and many, many capacitors were installed. In the longitudinal axis of the device, the picture tube was housed, with the magnetic deflection was rotatably mounted about the axis of the tube. Say, the complete deflection unit was turned around the tube by means of an electric motor drive.

topview

Since I had no chance to somehow understand the circuit, especially since apparently some components, such as the entire voltage and signal conditioning were not integrated in the monitor, but apparently were installed elsewhere in the plane, so I set out to dismantle everything. All that was left was the picture tube with the mechanics and the deflection coils and the drive. On a breadboard I started to make my own drive for the coil drive. For the deflection coil itself, I built a sawtooth generator with a sufficiently strong power output stage. And for the high voltage of the tube had to serve an old line transformer of a television, which was driven by a NE555 (the old known timer module) and a matching power transistor (some BU508 …).

and it´s turning again

The whole circuit was operated at about 24V and took over 2A. (including cathode heater and electric motor and the scale bulbs that illuminated the labels).
But it worked. On the screen was a green line, which turned at the adjustable rotational speed. That was already everything. There was no beam modulation or the like to draw any simulated radar images. Today you could work together with small microcontrollers like Arduino and co, quite simply …

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The Stirling engine

 
 
 
the finished machine

As a gift I received in the winter of 2014 a kit for a model of a Stirling hot air machine. The design plans, as well as the largely prefabricated parts, come from Mr. Klaus Künneth, the operator of the website www.kk-stirlingmotor.de

To build and install only a little manual skill and a few gauges and tools are needed. (Stand drill, drill and tap, a grinding block with polishing wheels, at least a sliding calliper, a little clear coat and machine oil). On some parts holes of various diameters are to be made. For example, on the flywheel, the connecting rods. In the cylinder and head cover, the mounting holes are to drill and thread to cut.

drill the flywheel

After preparing all the items, everything is polished to a high gloss on the polishing machine. Then you can start with the assembly. All in all, one should take a few hours to have the model beautiful, meticulous and functional. From a few parts is then also quickly made a small spirit burner, which provides the necessary heat for operation under the working piston. Everything together is then mounted on the clear lacquer-sealed wooden base plate.

finished polished unit
The functioning of the Stirling engine is described by Mr. Künneth on his website as follows:
 
„The Stirling engine is also called a hot air engine and is a heat engine in which a closed working gas such as air (in this case) or helium is alternately heated and cooled from outside at two different areas (hot side and cold side) to generate mechanical energy. The Stirling engine works on the principle of a closed cycle and is an example of the energy conversion of a poorly usable form of energy (thermal energy) in the better usable form of energy of mechanical energy. The Stirling engine can be operated with any external source of heat (or cold) (solar, wood, gas, liquid fuels, in this model with spirit).“
 
short video link:
 
 
 
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When the cross section is insufficient

… or in short words, too much current flows through a too thin wire, then it can get very hot. How that looks then, you can see very well in the picture. The insulation of the 1.5 mm² stranded wire has completely dissolved in smoke here in the area of ​​the terminal …
So you should not use this plug-in connection;)

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The old repair shop

While browsing the digital archives, I noticed the following pictures again.
Meanwhile, more than ten years have passed since I had to initiate the end of the television repair shop.

Look in the old workshop

Almost at the same time as the widespread use of flat screen televisions, orders were down. Except for a few customers, who insisted on retaining the old technology from ideational values, hardly anyone could fix it. Due to wage side costs and realistic, minimal profit-oriented pricing, it was just too expensive for people. If, for example, a repair of the high-voltage power supply of a television (replacement of line transformer, driver transisor and various capacitors and resistors) a price of about 90 euros assumed, that was again borderline, almost too expensive. If one considers that for these sum the parts scarcely 40 euro in the EK cost, then for the remaining 50 euro the error had to be searched for and found, everything to be expanded and reinstalled.

The unit had to be cleaned inside (often we got „boxes that collected the dust and nicotine of twenty years“.) Also, a careful test run should be done, so what about the 50 bugs? Hired labor costs more than half of non-wage labor costs. How many devices do you have to repair during the day in order to cover your costs?
 
 
dust accumulation

Sometimes you could see curiosities. Since one or the other owner of the TV has ever tried even as a repairer and found a faulty network backup. – „No problem, is only a backup …“ Which is then wrapped in the absence of a suitable new backup and knowledge simply with cigarette paper …

 
 
 
 
 
 
 
„expert“ repair of the customer
 
„Then it works again …“ which turns out to be not quite correct. After inserting „it pops and flashes“ and nothing was more … So the device came to me on the desk … „Why is the repair so expensive? – was only a fuse broken – I know myself out there – I am an electrician „You can hear such sayings then.
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The 80s and the Watchman

In 1985, the company Sony brings a small, compact and above all mobile TV on the market. The Watchman Voyager FD20-AEB. It has been designed to be used everywhere. For example, in the car, on vacation, just everywhere.
It is not a TV with LC display, or TFT, or LED display. No. The TV brings the image by means of a cathode ray tube (Braun tube) to the eye of the beholder. And not in the brilliant color variety and resolution of today’s receivers, but in black and white (BW).

 

 

The screen diagonal of 4.7 cm can be displayed with the help of a clip-on magnifier still a little enlarged.
The receiver is a multinorm receiver that covered the European television standards.

It was tuned manually by means of a side-mounted „rotary wheel“. The reception tapes VHF / UHF can be selected with a slide switch. Of course, only analog TV reception is possible.

source drawing: Frank’s Taschenfernseher.de
 

 

 

Settings such as brightness, contrast and also the image capture can be carried out on the underside of the device.

 Tunermodule and flattube

The power supply comes from four 1.5 volt AA batteries or from a power supply. At a power consumption of 2 watts is relatively fast on battery operation. The high voltage generation and heating of the flat screen tube is probably one of the biggest consumers of electricity.

The structure of the boards is very discreet. There are hardly any integrated circuits. The large tuner module can be seen on the left in the picture. The supply of signals takes place exclusively via a telescopic rod antenna. A built-in speaker provides the sound. Optionally, a jack for connecting a headphone is installed.

today there is only more noise to be received
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before Gameboy and Playstation

 
A trend of the 80’s were  mobile video games. As in the Gameboy, PSP and in the meantime also smartphone times, it was quite practical to have a small, compact game console with you as a young person.

As an example, I dug up one of these „mini consoles“. It is a popular video game called „Trick o Tronic“ with a small LCD screen. The difference to today’s LCD displays is that the game image does not consist of individually controlled pixels, which in total show the game figures, but each figure represented in the image was a kind of controllable symbol, so to speak. So, for example, a male had to run from left to right, so every movement and position was present as a separate symbol.

 

The background of the field was simply an image (photo or drawing) behind the LCD that represented the scene. The whole game was powered as well as the former digital clocks, with a 1.5 volt button cell. The sound of the game came from a piezo loudspeaker that could play beeps. (but only with one frequency)
 
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from Video8 to Digital

 

Now, during the holidays, it is a bit of time to copy the time stored on magnetic tape image and sound to new media.

The video recordings of the early 90s were still analogue on 8mm tapes instead. No, not Super8 (that was the movieformat like in cinema those times but much smaller), but on Video8 or HI8 (the better quality variant – comparable to VHS and SVHS, where the „HI“ or the „S-“ technically by a separate recording of the Y – and C- signal was realized (Y = luminance, so brightness information and C = chrominance, ie color information) .The recording itself, took place on magnetic tape in helical-scan technology (as well as VHS, U-Matic, Betamax, BetaCam, Video2000…). Except that the tape just has a width of 8mm and not 1/2 „or 1 inch, as with other systems. Also the sound is recorded in the helical scan.

In order to get the old records into a digital format that is common today, you need the following four things.
First, the tape (cassette) with the probably exciting content of days gone by. Next, a player is needed.

Here I got myself a then professional HI8 recorder, with which the playback of the tapes should work. The recorder is called EV-S9000E from Sony and came back to the net after almost twenty years break. After a short while, the smell of putrid fish was noticeable. An indication that some electrolytic capacitors of the SMD design are no longer in order. (A well-known problem with devices of older age and elko’s smaller, more compact design.) Nevertheless, I left the recorder on the net and made myself smart, which functions failed because of the numerous, not value-accurate components. So the power supply started and delivers at least. The flourescence indicator has failed. The 60V anode voltage seems to be missing here, no matter the tape drive works, so bring the analog signal to the computer.
 
 
For this I got myself a video to USB converter of elgato. Quickly installed the necessary software and inserted the first tape and pressed „Play“. The picture, however, was a disaster. All lines were totally distorted and offset. (As if the line frequency was wrong). So, before I put everything together again and disappear with the recorder in the workshop, I have again seen in the Config menu of the recorder. There I switched all AUTO options to manual, the television standard on PAL geknüppig and last but not least the TBC (TimeBaseCorrector) off. Lo and behold, the TBC is over too. Actually he should generate an absolutely stable time signal for the video line, but with defective electrics this is no longer possible.
Since I do not have ten tapes to digitize, the recorder should hold out …
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Electronics experiment box of the 80s

 

From my youth, these three red boxes came to this article. A relic from the basement of my parents‘ house. These are the electronic experiment boxes from Busch. These are the boxes „Compact studio 2060“, the „supplementary package 2061“ and the „digital-technik 2075“ box.

Busch electronic 2060, 2061 und 2075

The kits are in a relatively good condition, although I’ve made plenty of it as a budding teenager.
The first, so the basic box 2060, I got in the elementary school once for Christmas (must have been so about 1979 – 80), because the predecessor modular system of Philips for lack of knowledge and my urge to experiment unfortunately did not bring the success. (There was one of the transistors quickly broken and nothing worked anymore …) So my parents have looked for a new modular variant, with which I came as an 8-year-old then also coped perfectly. (Of the Philips kits, unfortunately, only fragments and parts of the base plate exist – but I’m currently in the bay looking for a copy of this kit.)
Back to the bush system:

As you can see in the photo, just about all parts are still present. Neatly I have then combined the two boxes 2060 and 2061 to a box. (Unfortunately)

The company Busch advertised at that time with the following slogan:
„Experiment without prior knowledge!“

The instruction books were structured in such a way that one quickly came to a sense of achievement and could then also think about the technical background. From the description of the boxes:
The „compact studio“ 2060 offers about 40 experiments and circuits, such as: „Electronic mini organ, alarm and rain warning systems, automatic flashing and timer, tone generator and audio amplifier,
Sensor key, voltage tester, remote-controlled electronic relay, siren and room switching, light organ principle circuit. “
One year later, I got the expansion box 2061. With that, experiments such as radio receivers were possible. From the MW and LW receivers to the FM FM receivers, where the inductors for the oscillating circuits themselves had to be wound (of course strictly according to plan).

Also, the 2061 is in good condition, unfortunately, the plastic retaining clips of the smoked glass plastic cover are broken, so that it rests only on the housing.
 

Here is now plenty of room for the multitude of experiments. Nicely tidied up, with a media panel with built-in potentiometer, variable capacitor for the receiver tuning stories. The loudspeaker is now also integrated in the housing, as well as a slide switch, a moving coil meter and a 5-pin diode socket. (That was a standard for audio connectors at the time).

 

Again, I tinkered in my childlike carelessness and integrated the LED and a 3.5mm and a 2.5mm jack into the control panel. Unfortunately, this does not look very professional and destroys the originality of the kit.

Another step was the entry into digital technology with the box 2075.
Here experiments such as: a 1-bit memory memory, counters with 7-segment LED display, random generators, etc. are built.

The power supply was provided for all experiment boxes with a 9V block battery. As an option, Busch also offered a power supply unit at that time.

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2.5 inches earlier and today

Before it lands in the archive, I have to put it here too …
It is a hard drive from the 90s (exactly 21.10.1991) – namely a 2.5 inch disk from Seagate with the incredible storage capacity of 85.3 MB (yes MEGABYTE). In comparison, a 160 GB (Gigabyte) disk from Fujitsu in 2007.

The Seagate disc with the designation ST-9096 was installed in a Commodore Amiga 1200. It kept the complete Amiga OS 3.1 including plenty of applications space. At that time you could not get that 85MB so easy.
To the technical data: If you want to format it today, you should know the following parameters: 980 cyl, 10 heads, 17 sectors gives a capacity of 85,299,200 bytes. The HDD has a power consumption of 2W in read / write mode and 1W in idlemode. 300mW still consumes it in sleep mode.
Interesting is perhaps even the size comparison to current records.
 
The interface complies with the IDE standard (Integrated Drive Electronics).
Größenvergleich
 /- 44-pin I/O Connector (* see below)
                                      |                     o o
                                    ::::::::::::o::::::::1  o o
                               =P=W=A===========#==================
                                                |           | |
       pin-20 removed for keying ---------------/           | |
                                                            | |
                                                            | |
 Drive is Master, no Slave drive present ------------------ 0 0
 Drive is Master, Seagate Slave drive present ------------- 1 0
 Drive is Slave to another ST9xxxA/ST9xxxA Master --------- 0 1
 Reserved Position (Do Not Use) --------------------------- 1 1

 * Drive uses +5vdc power supplied to the drive
   via the interface connector. The drive does
   NOT make use of a +12vdc power line.
   pin-41  +5vdc (Logic)
   pin-42  +5vdc (Motor)
   pin-43  Ground
   pin-44  Reserved
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something for the home network

I recently updated my home network a bit and swapped the old Netgear ReadyNAS Duo for a QNAP TS420. Since the supplier wanted to have a „rating“ on the article, I indulged myself in the five minutes and wrote a few lines …

 

I opted for Qnap based on a recommendation from an IT colleague and because I was also looking for a new, more powerful NAS that also supports WakeOnLan.
The NAS server should be able to be remotely powered up from the road. But this only works if the mains voltage of the NAS is not interrupted in the switched-off state (for example, by a Lan-controlled power strip). Furthermore, the router must support the forwarding of the MagicPacket.

A great feature of QNAP is TV streaming to the home network. You can plug a DVBT stick to one of the three USB sockets and then install a small tool on the NAS.
The Terratec Cinergy Piranha is NOT supported.


Unfortunately, very few DVBT sticks are compatible and recognized. So if you want to use this feature: Be sure to see the website for the compatible sticks. Of the APPs that can be installed on the QNAP, there’s plenty of … OwnCloud, all sorts of webapps and servers, downloaders … Everything is available on network protocols. There is also a quota management for each share or each user.


To the noise: The noise-volume of the NAS depends only on the volume and especially the temperature of the hard disks used. Here I would recommend to use only real server disks, otherwise the SMART status of the disks will quickly display an „ATTENTION“ or „WARNING“.

A problem that occurs every now and then: After booting, sometimes the web service will not start and the NAS will not be accessible through the browser. The shares are always there. However, a reboot always fixes the problem. (at least until now 🙂 A future firmware update should fix the problem. (meanwhile this problem is solved due to updates 2015)

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