Mini-TV Broksonic

Broksonic CIRT-2097T

This beautiful, small, new piece of technology from the eighties has been added to my collection. It is a small tube radio receiver with radio part called CIRT-2097T from the manufacturer Broksonic (according to Internet research it is an US company). The device I received with the attribute „defective“ quite cheap on a flea market platform. So I thought, the risk can be taken and risk a repair attempt. What great things can not be broken – if it’s not just the picture tube.

inside the Broksonic

After a short functional test with the plug-in power supply, it soon became clear that nothing was working. No picture – no sound, no nothing. Since the device also has a battery compartment, I next wanted to try to feed the power via the battery terminals to see if there may already be a problem. And there it was already – the problem. The battery cover was almost impossible to get off, it held as glued. After some back and forth, I got the lid but then non-destructive and it revealed the cause of „jamming“ or better „gluing“. There were still batteries in the battery compartment (probably for 20 or more years). They were in a bad condition, totally corroded and leaked. In part, the outer coat of the cell was corroded and no longer available. Oh dear – I thought, hopefully the leaked dielectric did not move inside the unit and did damage there. There was nothing left for me to do but to disassemble and check everything. And then the evil manifested itself:

from leaked battery cells distroyed pcb

About a quarter of the TV board had come in contact with the battery fluid. And the stuff has done a great job, etched away almost all the traces and leads from components.

So I first tried with PCB cleaner to remove all the crystals and the rest of the battery juice to get a closer look at the damage. A few random measurements with the ohmmeter quickly showed that many traces were severed. So it did not help, the tracks had to be uncovered. Only then would a reasonable repair possible.

Rough cleaning with the brass wire brush

With a rotating brass wire brush, I then began to remove the etched areas, remove the remains of the solder resist and expose the copper traces.

Fine work with glass brush

After the rough preliminary work had the glass brush ran. Only with that it was possible to remove all paint and corrosion residues and finally expose the traces. A tedious job …

the exposed and repaired copper tracks

… but finally it was possible to uncover and repair all damaged areas. Some resistors and capacitors also had to be renewed because their leads were also in poor condition.

After the repair, a bump test could then be carried out – lo and behold, there was no further error and the device was working properly again. So I was able to protect the repaired area of ​​the board with solder varnish from renewed corrosion and reassemble the device.

 

 

 

 

Finally, here is an overview of the technical data:

vendor:                            Broksonic (US-Firma New York)
type:                                  CIRT-2097T
year of production:   ca. 1982
model:                               TV+FM Empfänger portable
receiverprinciple:       Superhet
screensize:                     2 Zoll SW Bildröhre
bands:                               AM, FM, SW (Radio), VHFI,VHFIII,UHF (TV)
                                              AM: 535-1605kHz
                                              SW:3200-9700kHz
                                               FM:88-108MHzTV:
                                               VHF Kanal 2-13(US), 2-12 (E)
                                               UHF Kanal 14-83(US),21-69(E)
supply:                               battery or accu, AC with adaper
supplyvoltage:              accu 6V, battery 6×1.5V AA
speaker:                           dynamic 16 Ohms speaker
outputpower:              150mW
dimensions:                  150x53x202 mm (BxHxT)
weight:                             ca 1.1kg

   Sende Artikel als PDF   

VFD clock with date, day of the week and sound

I received a new kit for vacuum fluorescence display from Günter (gr-pojects). Thanks a lot!

It is a clock with Type IV-11 vacuum fluorescent display tubes for hours, minutes and seconds, and an IV-18 tube for date display, and IV-3 for displaying the day of the week. The clock consists of a mainboard with power supply, CPU, MP3 module and driver blocks for the tubes. The time is set and synchronized via an externally connected DCF-77 receiver. Later, the board will be extended with a real-time clock circuit. The power supply for the entire circuit comes from a small plug-in power supply with 12V / 1.2A. The total power consumption is about 450mA. As a special feature, the clock has a small MP3 sound module with MicroSD card slot. This receives from the microcontroller via the serial interface every quarter of an hour a corresponding command to play an MP3 file. Thus the quarter of an hour is signaled with a „gong beat“, half an hour with two and three quarters of an hour with three „gong strikes“. At the full hour, the corresponding time is announced.

The entire circuit is built into an aluminum-acrylic housing. All fittings are milled and screwed. A video of the structure and the function can be seen below:

   Sende Artikel als PDF   

Philips „Sonate“ Philetta Euro280

Philips Philetta Euro 280 „Sonate“

In the years 1968 to 1970, the radio receiver was built with the inscription „Philetta Euro 280“ by Philips. It is a small multi-band receiver with transistor equipment. The type designation 12RB280 / 30 with the inscription „Sonata“ seems to be another version of this model. In any case, I have dug up the version „Sonata“ – once again from the depths of the Kellergefilde – and after superficial cleaning connected to the mains. Immediately after switching on, the scale illumination lights up and a loud 50 Hz hum can be heard from the loudspeaker. Increasing the volume level adds some noise. So switched to the FM band and searched for a station – and lo and behold, it works. Only the buzzing disturbs. Otherwise, the device works without any major problems. To find the cause of the humming, you begin with the troubleshooting as usual in the power supply.

entfernte Rückwand

The rear panel is quickly removed and the power supply unit, consisting of a, mounted on a support plate transformer including rectifier and filter capacitors removed. Now, without using the oscilloscope and the multimeter, you can immediately see where the ravages of time have left their mark. The two electrolytic capacitors do not look quite healthy anymore.

A quick measurement of the voltages brings certainty. The DC voltages have a decent ripple, which causes the „hum“. So the function of the electrolytic capacitors to smooth the DC voltage is no longer, or poorly, given. A measurement of the capacities confirmed that. So I renewed the capacitors.

Power supply with renewed capacitors

Immediately after switching on, even before I had the probe at the measuring points, a noise was heard without „humming“. The oscilloscope image now showed a clean DC voltage – almost no ripple. The receiver worked again very clean, without disturbing background noise. That was apparently the only mistake.

Technical information:

The main principle of the receiver is a superhet (according to the superposition principle) with an IF of 460/10700 kHz. The waveband of the receiver:

frequency scale
  • long wave
  • medium wave 1 (520-1400kHz)
  • medium wave 2 (1400-1600kHz)
  • shortwave
  • UKW

The output stage has a power of 3W, which is converted into sound energy in a dynamic loudspeaker with permanent magnetic excitation. The case is made of plastic and has the dimensions 43×17.5×10.5cm with a weight of 2.4kg. The receiver is supplied with 220V / 50Hz mains voltage.

 

 

   Sende Artikel als PDF   

Technology toys from the past – made of plastic

This article has nothing to do with electronics. In my retro-madness I was once again rummaging in the cellar of the parents‘ house and discovered there behind dusty jars of musty-smelling cardboard boxes with unknown content. So what was left to me to uncover and view the contents of these cardboard boxes? And what came out here were other boxes of the well-known toy manufacturer „LEGO“. Some very dusty original boxes of Lego-Technik models and old washing powder boxes, which were filled with many, many colorful Lego bricks and other stuff and unfortunately also garbage. Actually, I thought to myself, these many plastic parts I can throw in the trash, because that will not play my son safe. Everything smells like cellar and is dirty and the work, everything to clean and sort will certainly no longer hurt anyone. But on the other hand is the really old toy from the 70s and 80s – so over forty years old. And that is exactly mine again. 🙂 Things from my childhood and memories of it.

So packed everything and transported home. And then, in painstaking work, sorted everything once into colors and freed it from rubbish and lego-foreign parts. And now the real work began. The goal should be to put together from the many parts of the old Lego-Technik models and missing parts as far as still available to order. The „vintage kits“ should be restored as well as possible in their originality.

Well mixed and not complete Lego boxes

The photo shows a small part of the „excavated“ Lego boxes. At least the boxes were already roughly cleaned. What came out after the painstaking sorting and construction work, however, can also be seen again.

 

Nr. 853 Lego Car-Chassis

The number 853 is the car chassis. The kit was sold in the year 1977. It consists of 601 parts and finished construction about 52cm long and 22cm wide.

The model has a four-cylinder in-line engine with two-speed gearbox and cardan shaft to the rigid rear axle. The gearbox as well as the pistons are functional. Likewise, the steering works. The seats are displaceable in the longitudinal axis.

In this series, the rear axle was still rigid and equipped with a differential. The following picture shows the tidy, restored kit.

 

Nr.: 8860 Car Chassis

Out of 671 individual parts, the car is to assemble chassis number 8860. The set dates from the year 1980 and has a size of 46×19 cm. Here was compared to the 853er already much expanded. The rear wheels are hung individually and have a suspension. The engine sits behind and this time is a four-cylinder boxer. Again, there is a transmission with three stages.

The seats are adjustable in the longitudinal direction and the inclination of the seat back can also be adjusted. Again, a rack and pinion steering is installed.

The original packaging is still available and looks like this in the sorted condition:

 

Nr. 854 Lego GoKart

From 1978 comes the Lego GoKart No. 854. It has the dimensions of approximately 21 x 13cm and is composed of 206 parts. On realized functions there is a rack and pinion steering and a single-cylinder engine, with a functional piston. The rear axle is rigid and the shaft is connected via a transmission with the crank of the piston. According to data in the network, this model has now reached cult status, as it should be one of the first Lego-technology models ever. Here is the original packaging and especially the number 9 on the front still available, then the model in collector’s circles should be really valuable. Unfortunately, I can not meet either criterion.

Nr. 856 Lego Bulldozer

 

With the model no. 856, Lego has launched one of the countless construction vehicle models on the market. The bulldozer dates back to 1979 and consists of 370 parts. The base is 24x 11cm at a height of 14cm. Of the functions of the blade is tiltable, raised and lowered. Two chains on gears represent the connection to the bearing surface.

 

Unfortunately, here too, only the box without internal division is available from the original packaging.

 

Nr. 8848 Lego Unimog

The Unimog 8848 from the year 1981 measures just under 30x12cm at a base of 14cm. It consists of 398 parts. As a functioning technology here again the steering, the tilting cargo area, as well as a raised and lowered, and tiltable bucket available.

Unfortunately, the box is missing the interior, otherwise the model is complete. Apart from the here presented, complete kits are still some more available, but where unfortunately too many parts missing. But some flea market or online raid of lego parts will probably arise once again to complete these sets and to be able to fully incorporate them into a retrospective collection.

 

 

   Sende Artikel als PDF   

YouTube, and interesting technology favorites

This time, I’m not going to talk about a project or an „old equipment concept“, but would like to introduce some interesting users or their contributions from the YouTube portal. These are contributions from the field of computer, technology and science, which I personally like to look at.

First and foremost, I would like to mention the legend of modern computer history, which has fascinated me since my youth. The ComputerClub from WDR times with Wolfgang Rudolph and Wolfgang Back. The two moderators moderated the program Computerclub from the beginning of the 80’s to 2003 at Westdeutscher Rundfunk. In the topics, the two men are generally concerned with computers and peripherals, new developments in the field of electronics and present all sorts of things here. Many broadcast recordings are archived on YouTube, including by user janbras.

On 22 February 2003, the last broadcast was broadcast on WDR.

But the two protagonists have not given up the computer club and let him resurrect on July 24, 2007 on a German private broadcaster (NRW-TV).

However, the private broadcaster NRW-TV had to cease its operation in 2016 and so the program was Nr.186 recorded as the last in the studios of NRW.

But Wolfgang Rudolph has managed by fundraising to set up his own studio and now produces the CC2 from his private studio on his own.

In the background, a lot has changed, which confused the viewers and freaks a bit. Parallel to the broadcasts existed the page cczwei.de which was filled by both gentlemen. After 13.12.2016 suddenly a new page appeared. The new domain cc2.tv has been created. The now operates Rudolph alone. The domain cczwei.de continues to be operated by Mr. Back. He is assisted by Heinz Schmitz, who is now producing YouTube broadcasts with Mr. Back. Apparently, there were sufficient reasons for the gentlemen to part with years of community work. There never was an official explanation.

 

From the computer area, the guys from VirtualDimension report. They call their channel VD Hurrican and produce the formats: Virtual Worlds, Back in Time, Retroplay and On Site. The contributions are absolutely professional and mainly deal with home computers. With a lot of background information the old 8 and 16 Bit’er are presented here. Gameplay as well as fair reports and contributions from community events are also part of their repertoire. As an example here a link to the unboxing of an Amiga500 and its history. On the occasion of their 1000th subscriber on YouTube, they have published a 1000-subscriber special with a studio tour.

From the Australian continent, Dave Jones, also an inveterate technician, blogs. On his YouTube channel EEVblog, He also introduces electronic devices, explains their structure and operation. A special category in his channel are the so-called Mailbags. Here, Dave receives packages from people in the community who he opens in front of the camera and presents their content. This can be old computers and boards, or even new developments and prototypes of startups that are presented here.

 

A slightly different channel is that of an Englishman. He calls himself Photonicinduction and shows experiments with high performances. All sorts of appliances, such as vacuum cleaners, heating lamps, washing machines, loudspeakers, etc. are operated to the limit of their maximum performance data – and far beyond. The end of the device through destruction is the goal here.

 

 

   Sende Artikel als PDF   

X-Mas 2016

Merry Christmas to the visitors of the blog!

Now it is already two years, in which I feed the „technology and retro blog“ with contributions. Who would have thought that … By now some readers have strayed here and asked if I could introduce one or the other device here. Of course I will try to realize it if possible. Unfortunately, the rubric with the computers of the 80s is still empty. Here I still lack the „thread“, as I should process the whole – it floats me to every device before a small video in which the devices are to be shown in the living state. If someone has ideas for that … like.

I would like to say a big thank you to my colleague Mario Wehr, who provides me with the WordPress environment and thus offers excellent service!

In this sense: Merry Christmas and happy holidays!

 

 

 

   Sende Artikel als PDF   

Retro controller brand new

NES – Nintendo Entertainment System is certainly still a household name. It was the 8-bit game console from Nintendo, which was also sold in Europe in the mid-80s and had influenced the youth of the time. It is now a museum piece that already deserves the title „Retro“. Maybe for this reason, she begins to revive in the Retrogamergemeinde. For example, this year a remake of the NES in miniaturized form with modern technology and pre-installed games on the market.

dsc_2760Also via emulators for all kinds of platforms you can bring the old NES game titles back to life. In order to be able to serve these games „in the right way“ (of course, it is also possible with the PC keyboard or via the touch screen on the mobile phone), the company 8Bitdo Tech has launched the NES30 GamePad Controller. It is a wireless bluetooth controller which was modeled on the original NES controller. It is equipped with an integrated rechargeable battery that can be charged via a MicroUSB cable connection. The controller is designed to be configured as a PC game controller, as a joystick, as a Bluetooth keyboard, and as a USB joystick. This can be realized via five different modes. These modes can be selected by keyboard shortcuts during power up. The table below shows the different modes:

  Mode1 Mode2 Mode3 Mode4 Mode5
  Joystick BT-Keyboard iCade Emu-Touch USB-Joystick
Power ON START START+B START+A START+X Kabelverbindung
Blue LEDs are flashing 1x 2x 3x 4x
OS WIN Android WIN/Apple Android Android Apple Android Apple WIN
           

dsc_2759The picture shows the USB charging socket, to the right of which are two status LEDs.

dsc_2816The battery is located on the back of the board

dsc_2817die Platine des Controllers; der die Firmware des Mikrocontrollers kann aktualisiert werden

dsc_2818Contact mats represent the buttons. Under the two shoulder buttons are real micro buttons …

dscn0763Here is the emulator „NES Emu“ served on an Android phone with the NES30;)

 

   Sende Artikel als PDF   

WordPress to Word.doc

If you wanted to save your Blogposts from WordPress, you will definitely know the XML export function in the Dashboard of WordPress itself. Here you can create and save an XML file in the menu „Tools“ under „Export data“ , This XML file can be used in a – for example – server error again to create the blog.

But what to do if you want to save your blog content in a Word file, or as a PDF, or even print? There are several possibilities to realize this. I will briefly list these variants here.

The latter tool I find personally very convenient and convenient, since it is very easy here to export his entire blog, including images in a Word document and postprocessing. All you have to do is export the XML file from wordpress.

converter0
chooese XML-file

After specifying the XML file, the blog posts are displayed directly in a list. Now you can choose which blog post should be converted and whether it should be a Word or PDF document.

 

converter1
window with exportable posts

Now you can start exporting …

converter2Depending on the number of posts and their length, the corresponding document is quickly available and can be edited as needed …

   Sende Artikel als PDF   

Wickie, Slime & Paiper

_20160611_185029
ISBN 3-205-98989-9

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.

 

wsup2
Eskimo  ice-pricesheet(prices in Austrian Schilling 😉 )

 

   Sende Artikel als PDF   

Beware of electrical goods from the Far East

DSC_2196The 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.

DSC_2199
left: cable without CE marking right: standard cable
DSC_2198
Plug without any test marks.

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!

   Sende Artikel als PDF