Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and information about some of the electronic, electrical and electrotechnical Obsolete technology relics that the Frank Sharp Private museum has accumulated over the years .
Premise: There are lots of vintage electrical and electronic items that have not survived well or even completely disappeared and forgotten.

Or are not being collected nowadays in proportion to their significance or prevalence in their heyday, this is bad and the main part of the death land. The heavy, ugly sarcophagus; models with few endearing qualities, devices that have some over-riding disadvantage to ownership such as heavy weight,toxicity or inflated value when dismantled, tend to be under-represented by all but the most comprehensive collections and museums. They get relegated to the bottom of the wants list, derided as 'more trouble than they are worth', or just forgotten entirely. As a result, I started to notice gaps in the current representation of the history of electronic and electrical technology to the interested member of the public.

Following this idea around a bit, convinced me that a collection of the peculiar alone could not hope to survive on its own merits, but a museum that gave equal display space to the popular and the unpopular, would bring things to the attention of the average person that he has previously passed by or been shielded from. It's a matter of culture. From this, the Obsolete Technology Tellye Web Museum concept developed and all my other things too. It's an open platform for all electrical Electronic TV technology to have its few, but NOT last, moments of fame in a working, hand-on environment. We'll never own Colossus or Faraday's first transformer, but I can show things that you can't see at the Science Museum, and let you play with things that the Smithsonian can't allow people to touch, because my remit is different.

There was a society once that was the polar opposite of our disposable, junk society. A whole nation was built on the idea of placing quality before quantity in all things. The goal was not “more and newer,” but “better and higher" .This attitude was reflected not only in the manufacturing of material goods, but also in the realms of art and architecture, as well as in the social fabric of everyday life. The goal was for each new cohort of children to stand on a higher level than the preceding cohort: they were to be healthier, stronger, more intelligent, and more vibrant in every way.

The society that prioritized human, social and material quality is a Winner. Truly, it is the high point of all Western civilization. Consequently, its defeat meant the defeat of civilization itself.

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

OLD, but ORIGINAL, Well made, Funny, Not remotely controlled............. and not Made in CHINA.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

Every CRT Television saved let revive knowledge, thoughts, moments of the past life which will never return again.........

Many contemporary "televisions" (more correctly named as displays) would not have this level of staying power, many would ware out or require major services within just five years or less and of course, there is that perennial bug bear of planned obsolescence where components are deliberately designed to fail and, or manufactured with limited edition specificities..... and without considering........picture......sound........quality........
..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

Have big FUN ! !
©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All sets and apparates appearing here are property of Engineer Frank Sharp. NOTHING HERE IS FOR SALE !
All posts are presented here for informative, historical and educative purposes as applicable within Fair Use.

Wednesday, May 25, 2011


The family of microcontrollers is fabricated in NMOS. The family consists of 5 devices:
O MAB8401 - 128 bytes RAM, external program memory, with 8-bit LED-driver (10mA),
emulation of MAB/F8422/42* possible
0 MAB/MAF8421 - 2K bytes ROM/64 bytes RAM plus 8-bit LED-driver
0 MAB/MAF8441 - 4l< bytes ROM/128 bytes RAM plus 8-bit LED-driver
0 MAB/MAF8461 - 6K bytes ROM/128 bytes RAM plus 8-bit LED-driver
Each version has 20 quasi-bidirectional l/O port lines, one serial l/O line, one single-level vectored
interrupt, an 8-bit timer/event counter and on-board clock oscillator and clock circuits. Two 20-pin
versions, MAB/F8422 and MAB/F8442* are also available.
This microcontroller family is designed to be an efficient controller as well as an arithmetic processor.
The instruction set is based on that of the MAB8048. The microcontrollers have extensive bit handling
abilities and facilities for both binary and BCD arithmetic.
For detailed information see the 84XX family specification.
* See data sheet on MAB/F8422/42.
0 8-bit: CPU, ROM, RAM and I/O in a single 28-lead DIL package
0 2K, 4K or 6K ROM bytes plus a FlOM~less version
0 64 or 128 RAM bytes
O 20 quasi-bidirectional l/O port lines
0 Two testable inputs: one of which can be used to detect zero cross-over, the other is also the
external interrupt input
0 Single level vectored interrupts: external, timer/event counter, serial l/O
0 Serial I/O that can be used in single or multi-master systems (serial l/O data via an existing port line
and clock via a dedicated line)
0 8»bit programmable timer/event counter
0 Internal oscillator, generated with inductor, crystal, ceramic resonator or external source
0 Over 80 instructions (based on MAB8048) all of 1 or 2 cycles
0 Single 5 V power supply (i 10%)
0 Operating temperature ranges: O to + 70 0C MAB84X1 family
-40 to + 85 °C MAF84X1 family only
-40 to +110 UC MAF84AX1 family only
MAB8401 B: 28-lead 'Piggy-back’ package (with up to 28-pin EPROM on top).
MAB8401WP: 68-lead plastic leaded chip-carrier (PLCC) (SOT188).
MAB/MAF8421/41/61P: 28-lead DIL; plastic with internal heat spreader (SOT117).
MAF84A21/41/61P: 28~lead DIL; plastic with internal heat spreader (SOT117).
MAB8421/41/61T: 28


The SAB3034 provides closed-loop digital tuning of TV receivers, with or without a.f.c., as required. lt
also controls up to 8 analogue functions, 4 general purpose I/O ports and 4 high-current outputs for
tuner band selection.
The IC is used in conjunction with a microcomputer from the MAB84OO family and is controlled via a two-wire, bidirectional I2 C bus.
Featu res
Combined analogue and digital circuitry minimizes the number of additional interfacing components
Frequency measurement with resolution of 50 KHz
Selectable prescaler divisor of 64 or 256
32 V tuning voltage amplifier
4 high-current outputs for direct band selection
8 static digital to analogue converters (DACSI for control of analogue functions
Four general purpose input/output (l/O) ports
Tuning with control of speed and direction
Tuning with or without a.f.c.
Single-pin, 4 MHZ on-chip oscillator
I2 C bus slave transceiver

The SAB3034 is a monolithic computer interface which provides tuning and control functions and
operates in conjunction with a microcomputer via an I2 C bus.
This is performed using frequency-locked loop digital control. Data corresponding to the required tuner
frequency is stored in a 15-bit frequency buffer. The actual tuner frequency, divided by a factor of 256
(or by 64) by a prescaler, is applied via a gate to a 15-bit frequency counter. This input (FDIV) is
measured over a period controlled by a time reference counter and is compared with the contents of the frequency buffer. The result of the comparison is used to control the tuning voltage so that the tuner frequency equals the contents of the frequency buffer multiplied by 50 kHz within a programmable tuning window (TUW).

The system cycles over a period of 6,4 ms (or 2,56 ms), controlled by the time reference counter which is clocked by an on-chip 4 lVlHz reference oscillator. Regulation of the tuning voltage is performed by a charge pump frequency-locked loop system. The charge IT flowing into the tuning voltage amplifier is controlled by the tuning counter, 3-bit DAC and the charge pump circuit. The charge IT is linear with the frequency deviation Af in steps of 50

TDA2545A Quasi-split-sound circuit
GENERAL DESCRIPTION The TDA2545A is a monolithic integrated circuit for quasi-split-sound processing in television receivers. Features · 3-stage gain controlled i.f. amplifier · A.G.C. circuit · Reference amplifier and limiter amplifier for vision carrier (V.C.) processing · Linear multiplier for quadrature demodulation.


The TDA2540 and 2541 are IF amplifier and A.M.
demodulator circuits for colour and black and white
televisionreceiversusingPNPorNPNtuners. They
are intended for reception of negative or positive
modulation CCIR standard.
They incorporate the following functions : .Gain controlled amplifier .Synchronous demodulator .White spot inverter .Video preamplifier with noise protection .Switchable AFC .AGC with noise gating .Tuner AGC output (NPN tuner for 2540)-(PNP
tuner for 2541) .VCR switch for video output inhibition (VCR
play back).


The TDA2006 is a monolithic integrated circuit in
Pentawatt package, intended for use as a low
frequency class ”AB” amplifier. At ±12V, d = 10 %
typically it provides12Woutput poweron a 4W load
and 8W on a 8W . The TDA2006 provides high
output current and has very low harmonic and
cross-over distortion. Further the device incorporates
anoriginal (and patented)short circuit protection
system comprising an arrangement for
automatically limiting the dissipated power so as to
keep the working point of the output transistors
within their safe operating area. A conventional
thermal shutdown system is also included. The
TDA2006 is pin to pin equivalent to theTDA2030.


The TDA2006 has an original circuit which limits
the current of the output transistors.
This function can thereforebe considered as being
peak power limiting rather than simple current limiting.
It reduces the possibility that the device gets damaged
during an accidental short circuit from AC
output to ground.
The presence of a thermal limiting circuit offers the
following advantages :
1) an overload on the output (even if it is
permanent), or an above l imi t ambient
temperature can be easily supported since the
Tj cannot be higher than 150°C.
2) the heatsink can have a smaller factor of safety
compared with that of a conventional circuit.
There is no possibility of device damage due to
high junction temperature.
If for any reason, the junction temperature increases
up to 150 °C, the thermal shutdown simply
reduces the power dissipation and the current consumption.
The maximum allowable power dissipation depends
upon the size of the external heatsink (i.e.
its thermal resistance)

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