It does not have anything directly to do with technology, but perhaps fits under the title „retro“ as a post very well in the blog: A book for browsing memories of the 70s and 80s is the band „Wickie, Slime and Paiper“ by Susanne Pauser and Wolfgang Ritschl. The book was published in 1999 by Böhler-Verlag Wien. It is a printed summary of an online forum as a souvenir album for the children of the seventies. It mentions numerous products and fashions, television and radio programs that were up to date at the time and is discussed and commented by the protagonists of the forum, themselves children of the seventies. The print is accompanied by scanned images of posters, catalogs, advertising slogans.
The other day I noticed with a cold-device connection cable that the cable sheath has come loose in the area of the strain relief. The wires came out. By itself, this is nothing special, if not here, apart from the unusual colors, the unusually small diameter of the wires in the eye would sting.
Normally, such a jacket cable with 16A / 250V and a CE mark is marked on the plug. The cross section of the stranded wires is 1.5mm². The cable here on the photo but an indication of 10A / 250V was printed and NO CE sign available. The strands have a cross section of less than 0.5mm² !! Who uses such a cable and for example operates a heater with it, then may not be surprised if a quick fire breaks out … Unfortunately, I can not understand with what device I got this cable included. But it does not conform to the valid standards and represents a danger in the enterprise. In any case: Keep away from such products!
Some time has passed since the last blog entry. On the one hand, I put this down to a lot of work, both professionally and privately, so that a bit of the energy for blogging was missing. The last days is the beautiful weather to blame. I preferred to spend my time riding a motorcycle instead of sitting behind the PC … But I also got a little gimmick again.
A colleague told me about it and at a large Internet mail-order company, I quickly found it. It is a so-called „FritzRoy storm glass„.
A storm glass is known for a long time from the seafaring. There it was used to predict weather changes. The storm glass is a glass cylinder filled with two liquids and hermetically sealed. The fluids are usually camphor and alcohol in saturated form, which do not mix but form small crystals. The formation of these crystals is related to the weather change. For a long time it was believed that the crystals react to changes in air pressure. Recent research allegedly suggests that the crystals react to electromagnetic fields called sferics. These sferics are preferably formed in low pressure areas. Thus, the storm glass shows the approach of a low pressure area and thus the bad weather.
The table (from the CarloMilano user manual) shows the different crystal weather relationships.
… from the fund of grandmother’s cottage is this instant powder can.
The post does not have much to do with technology this time, but I’ve noticed this tin can because of the age and the designer graphics from times gone by. That’s why a few pictures of it must come in here. You do not see that very often anymore.
As can be seen in the photo, the instant powder can is the packaging of Ovomaltine.
Ovaltine contains the ingredients barley malt, milk powder, low-fat / de-oiled cocoa, whey powder, glucose syrup, yeast and honey. From the names of the ingredients is also the name Ovomaltine together: ovum (Latin egg) and malt (English malt). The high proportion of malt gives the Ovaltine their typical taste. Like the powder of instant cocoa drinks, Ovaltine is ready to drink after being stirred into cold or warm milk. (Wikipedia)
According to online research, the tin dates from the years 1954-1961 and was apparently used by my grandmother as a storage container for mothballs 🙂
From the early 1980s comes the „City Bummler“ a mobile, portable cassette player – in short a Walkman. At that time, I received it as a Christmas present during my middle school years. The special feature of this device was a built-in microphone and two headphone ports. So you could listen to music in pairs and if you wanted to say something without having to remove the headphones (or to reduce the volume), so you had to press only an orange colored button and the intercom was active. The device was sold as a low-priced „replica“ version of the first Walkman from Sony, the TPS-L2 which came on July 1, 1979 on the market. The citybummler was distributed by UNIVERSUM via the source mailer.
The device was delivered in a box with headphones, cassette pocket and carrying case with strap. For operation, three AA size 1.5V batteries were needed. The volume control is carried out with two separate sliders, so that each channel can be controlled separately. Unfortunately, the city loafer has not passed the last 35 years quite unscathed. Over time, the cassette cover was broken off, which I then replaced in my youth with a homemade tinplate lid. At some point I did not like the case color and I painted the device green. (or I just had green paint at hand). At least the „loafer“ still exists and it works too.
I was then on the Web in search of a well-preserved, in the original state city loafer. However, the offer is extremely low and the few offers on online auction houses are not interesting because of the immense shipping costs.
But a compromise and at the same time a new piece in the collection is the FELLOW FE-1 Walkman. I got the most cheap and fully functional on a second-hand stock market.
The Fellow is also a clone of the Sony TPS-L2. It differs essentially in the arrangement of the keys of the drive.
The Goerz multimeter, model: Minitest FE5101 dates from 1969 and was manufactured by the company Goerz Elektro Ges.m.b.H from Vienna.
Introductory sentence from the operating instructions: „It is a multi-measuring instrument, which is particularly suitable for service work in the field of news and radio technology and electronics due to its small dimensions and low weight as a pocket instrument It allows the measurement of: equal and AC voltages, DC and AC, resistance, capacitance and frequency. „
The internal resistance is 20kOhm for DC and 4kOhm for AC. The achieved accuracy is 2.5%
As overload protection, the moving-coil meter is equipped with antiparallel-connected diodes.
In this model, the measuring ranges are not to be selected by a selector switch, but each individual measuring range is designed as a socket on the device. The sockets themselves are suitable for 2mm banana plugs. The power supply for the resistance measurement comes from a 3V dry cell battery (type 2R10 duplex battery).
For the measurement of the capacitance with this device an external voltage is necessary, because here no own alternating voltage generator is installed. This said external voltage is the 50 Hz mains voltage which is connected to the device via its own supply cable. So a capacity measurement up to 500nF can be achieved. Measurements greater than 0.5uF are no longer possible due to the low measuring frequency. Goerz supplied a polystyrene transport case for storage and transport.
From the years from 1964 comes the analogue multimeter Unigor 3n from Norma, respectively Goerz-Metrawatt. It was characterized by the large measuring range of 52 measuring ranges, all of which can be selected with just one selector switch. The measuring mode and polarity reversal is realized with a push-button switch. All measurements (except the 10A range) are possible on just one terminal pair.
The measuring mechanism is a „clamping band measuring unit“ with a very good vibration resistance and low self-consumption.
The internal resistance for voltage measurements is a maximum of 4MOhm in the highest measuring range (see photo technical data). The voltage drop in current measurements is given as 12mV in the 120uA range and 120mV in the 30A range. The measuring accuracy is 1% for DC and 1.5% for AC measuring ranges.
Like the Unigor 6e, the 3n model is also equipped with various safety features.
The power supply of the multimeter takes over a 1.5V mono cell.
The following piece is about 40 years old model steam engine from the manufacturer Wilesco. (Thanks to Manfred for the loan for the media preparation). The model consists of a highly polished and nickel-plated brass kettle, which is built into an old copper-colored boiler house with brick pattern. Heating is done with a dry spirit burner located under the boiler. The pressure vessel has a spring safety valve and a „Domdampfpfeife“. The pressure line is led to a single-acting pendulum cylinder, which in turn drives the crank and the flywheel on it via a connecting rod.Trockenspiritusbrenner.
The entire model is mounted on an iron plate. In order to be able to drive mechanical models with the machine, a pulley is mounted on the shaft of the flywheel. Since the model has been stored in a carton for the past forty years, a few small jobs have been done. Piston and crank were stiff and had to be cleaned and re-oiled. The crank was a bit out of alignment with the flywheel shaft.
The seals of the „Domdampfpfeife“ and the pressure relief valve were also brittle and hardened and were replaced. Here I was able to use a suitable punching tool made of „new“ old gasket material to knock out and insert two new gaskets. Now the model was a little bit freed from the dust of the last years and cleaned and a start attempt was nothing in the way.
Now the spirit burner could be filled with a small piece of dry spirit, which was probably even older than the machine itself. At least the original box looks like this:
Another electronics kit from my youth is the Philips EE series. It dates approximately to the years 1976-1979. The box presented here is the EE2050. Unfortunately, this is no longer the original that I recorded back then, but a version bought on eBay. But this is a real collector’s item, because the box has never been recorded.
The boxes (EE2003 / 41/50/51/52) under my custody have unfortunately not survived the years. Since the modular system was designed in such a way that all components were „free“, ie not riveted to any sockets (just as they were also used in industry), I always used them. If I needed a resistor or capacitor quickly, the kit had to serve as a „donor“.
The concept of the modular system: It consists of a perforated plastic base plate through which a hairpin spring is inserted. This hairpin spring in turn holds a spiral spring. Now, between the hairpin spring and the upper end of the coil spring, the connection wire of the component can be clamped.
The components themselves are contained in the box as they are also commercially available. An exception here are only the transistors and transformers. They are mounted on a small printed circuit board, which facilitates assembly and also protects the component itself from mechanical stress.
In the final stage, the box consists of two bolted base plates, which in turn are bolted to a control panel. In this media console then turn capacitors, rotary potentiometers, buttons, bulbs and a speaker place. The number of experiments to build is also huge. The manuals are very well structured. They describe the basics of DC technology, as well as the operation of the circuits.
Here is an excerpt from the inscription of the electronics box. Note the gender-oriented spelling 🙂
Wonderful world of electronics – a mysterious world that every boy wants to get to know and understand. This electronic kit gives him the opportunity to easily gather his own insights in this field. The box contains a richly illustrated instruction book and over 150 items – e.g. 10 resistors, 5 capacitors, photocell and transistors. Thanks to the clamping system, the young electronics builder can assemble these parts completely independently and without prior knowledge to the following functional devices:
Burglar Alarm Systems, Amplifiers, Automatic Parking Lights, Humidity Indicators, Acoustic Relays, Morse Exercise Machines, Brightness Controls, Timers, Others – a total of 21 electronic devices and many interesting circuits.
With additional boxes the possibilities extend to the MW radio with loudspeaker. Proper engineers work with the same parts: all the boxes in the Philips Elektronik series are equipped with the most modern parts of today’s electronics in their original form.
A multi-band radio receiver from the year 1957 is the Tempocord of the company Minerva. The company Minerva was founded in Vienna in 1919 and began in 1924 with the production of radio receivers. The radios were initially made under the name Radiola or Aeriola. It was not until 1926 that the receivers were built under the name Minerva. The name Minerva was used until 1972.
The device here refuses any service after being supplied with the mains voltage. Thus, a first error is found quickly. The mains voltage does not reach the transformer. The reason for this is the mains fuses, which protect the transformer from all poles. Here are both broken. Probably because the transformer tap was clamped to 220V … Rectification and smoothing capacitors are fine.
The fuses, however, are wrapped in paper security wires, which are wrapped at the ends each with a brass clip. Due to the lack of availability of these old fuses, the fuse holders located on the Trafoprint have been swapped for current ones and reinserted. After carefully raising the supply voltage, the receiver was again able to elicit sounds …