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, June 30, 2010


The variety of transistors and diodes in TV sets has increased a lot today, greatly decreasing their availability in electronics stores. Although it may seem simple, often finding a replacement transistor or diode can be a chore. The fact is that it is not so simple, it is not just to check the main characteristics (Voltage, Current and Power) and if it is NPN or PNP, or if it is a zener or common diode. In addition, knowing the meaning of the encodings used in the nomenclatures of these components also helps a lot and greatly simplifies the work.
There are several encodings for semiconductor nomenclatures. I will address here, the most important, the most usual and directed to transistors and diodes.
The main codifications are: PROELECTRON - Europe / JEDEC - United States / JIS - Japan.
They can be started with 2 letters (Commercial use) or 3 letters (Professional use). The first letter indicates the material type:
A : Germanium.
B : Silicon.
The second letter indicates the main application:
A : Detector, mixer and switching diodes.
B : Varicap diode. (Variable capacitance)
C : Low power transistor for audio frequency.
D : Medium and high power transistors for audio frequency.
E : Tunnel diode.
F : Low power transistor for radio frequency.
L : High power transistor for radio frequency.
N : Optocoupler.
P : Photo-diodes and other radiation sensitive components.
Q : Light Emitting Diode and other radiation emitting components.
R or T : Thyristors and other control or trip switched components.
S : Low power switching transistors.
U : High power switching transistors.
X : Varistors and diodes combined.
Y : Rectifier diodes and power diodes.
Z : Zener diodes.
The third letter, if any, indicates whether the component is for commercial or professional use:
W and X : Components for commercial use.
Y and Z : Components for professional use.
Examples: BC337B
B : Silicon
C : Transistor for audio track
33 7: Transistor serial number
B : 60 Volts (No letter: 50 Volts)
B : Silicon
Y : Rectifier diode
Z : I use the professional
10 : Numerical series of the diode.
Small diodes can appear with the three initial letters encoded in the color of the diode body: Green body: BAV / Blue body: BAW / Black body: BAX
In these cases, the 3 digits of the numerical series are indicated by bands of the color code with values ​​equivalent to the code used on the resistors. For these diodes, the first and thickest band is close to the cathode terminal.
Zener Diode :
After the numerical series, a letter is usually used followed by the zener tension, using the letter V as a comma.
The first letter indicates the working voltage tolerance. When the letter R appears at the end, it means that the polarity is reversed.
Letter after numeric series:
A : 1%
B : 2%
C : 5%
D : 10%
E : 15%
Example: BZX79C6V8
B : Silicon
Z : zener diode
X : Commercial use
79 : Numerical series of the diode.
C : 5% tolerance in the working voltage.
6V8 : Value of the zener voltage. (In this case, the "V" represents the comma) = 6.8 Volts

The Jedec code basically starts with a number, followed by the letter N , plus the numerical series. The starting number indicates the number of semiconductor junctions, 1 for the diode and 2 for the transistor. The letter N stands for silicon material.
Example: 2N2236
2 : Transistor
N : Silicon
2236 : Numerical series.
1 : Diode
N : Silicon
4148 : Numerical series.
In the case of color-coded diodes, there can be 3 to 5 colored bands, as shown in the table below, with no bands to indicate “1N”, the first bands represent the numerical series and, if the first belt is black, it will have no value. The last track is usually the letter of the suffix. The strip close to the cathode terminal has a double thickness.



It is a coding initiated by the number 1 or 2, 1 for diodes and 2 for transistors, followed by a pair of letters that indicate the type and application of the semiconductor as shown in the table below. Next is the numerical series of the component.
SA : PNP to HF SJ : P channel mosfet
SB : PNP to AF SK : Mosfet channel N
SC : NPN to RF SM : Triac
SD : NPN to AF SR : Rectifier
SE : SS Diodes: Signal Diode
SF : Thyristors SV : Varicaps
SH : Unijunction SZ : Diode Zener
Example: 2SC2235
2 : Transistor
SC : NPN for RF application.
2235 - Numerical series of the component.
1 : Diode
SS : Signal
101 : Numerical series of the component.
As the reader can see, this subject is not limited to a brief article like this, but the information provided here will help many colleagues when choosing a diode or a transistor, as a replacement or for use on a TV card.

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