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When was the BC107 introduced?

Discussion in 'Electronic Design' started by John B, Mar 6, 2007.

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  1. John B

    John B Guest

    Well the question is in the subject header. A friend is researching
    information for a museum display about semiconductors and needs to know
    when the first Silicon transistors were introduced. There seems to be
    plenty of information about the historical Germanium semiconductors but
    little about the early Silicon ones.

    Perhaps Jim could help???
  2. John Larkin

    John Larkin Guest

  3. Joerg

    Joerg Guest

    My datasheet has a 1973 date stamp but I am sure it is older.
  4. Jim Thompson

    Jim Thompson Guest

  5. John B

    John B Guest

  6. John B

    John B Guest

    Oh, just a youngster then ;-). I completed my first transistor radio
    kit in 1955 (2 days after my 8th birthday) using an OC71 and an OC72.
    It worked! Since we only lived 15 miles away from the BBC Home Service
    long wave transmitter at Brookmans Park, it could hardly fail could it.

    It was 50 years later (to the day) that I retired.
  7. Jim Thompson

    Jim Thompson Guest

    In 1955, I was 15 years old ;-)

    ...Jim Thompson
  8. Ian Bell

    Ian Bell Guest

    I remember the Practical Wireless series a little later (possibly ~1960 when
    I was 10) that used a wooden base with wood screws and copper washers to
    make connections. It started with a simple crystal set then added
    transistors in ever more complex designs.

    It was 40 years later that I retired ;-)

  9. Joerg

    Joerg Guest

    I can't compete then. My first one had a AF126. The next ones went retro
    because transistors cost several Dollars a pop, a whole lot of money
    back then, and tubes were virtually free. Lots of discarded TV sets
    provided a large stash of those. That was when I realized that
    transistors were kind of ok but tubes had a dynamic range from here to
    the Klondike. Only when Fets such as ye olde P8000 (or lots of BF245s in
    parallel) appeared did that situation really change but those were also
    very expensive.

    Nose will be to the grindstone for 1-2 more decade here.
  10. Phil Allison

    Phil Allison Guest

    "John B"

    ** The Philips BC107,8,9 series became available in the mid to late 1960s.

    However, these are NOT early silicon types.

    ** Err - ever think of using Google ?

    ....... Phil
  11. The Philips Databook SC2 of Nov 77 has the BC107 to BC109 entry with
    dates of
    June 77 for page 1,
    Nov 68 for pages 2 - 13 &
    March 69 for page 14.

    Their 1985 S3 Databook dates the last page (which seems identical) as
    also Nov 68.

    These dates probably only reflect when they wrote those datasheets
    because the earliest germanium date in SC2 is only April 68 for the
    AC125 & AC126. Other germanium devices have dates in the 70's.
  12. Phil Allison

    Phil Allison Guest

    "Malcolm Moore"

    ** It sure is.

    High school friends of mine were building tape head pre-amps with BC108s and
    BC109s in 1968.

    The devices were so cheap & popular, that at least one UK component shop
    sold them to users by weight to save time counting them !!

    ........ Phil
  13. John B

    John B Guest

    On 06/03/2007 Phil Allison wrote:

    Hi Phil,

    Yep, but it's not as much fun as posting here and then ducking behind
    the fireguard is it. ;-)
  14. Joerg

    Joerg Guest

    In Germany you really had to watch it. Yeah, they'd also sell them cheap
    or in bulk but a lot of times those must have come from a re-labeler.
    Some were leaky, some had dismal beta, others plain didn't work at all.
    These guys probably got a hold of product that had "fallen through the
    cracks" in final QC. I learned the hard way that transistors scrapped
    from partially transistorized TV sets (very hard to come by back then)
    were the only way to get quality stuff, except for rich folks. Only the
    tuners had transistors and it was a lot of work prying them out. But the
    rewards was a couple of AF239 hotrods.

    A genuine brand name version of almost any kind of transistor was about
    4 Deutschmarks in the 70's. Each one was packaged in its own little
    paper box. The situation might have been a bit better for the guys who
    lived in larger cities.
  15. Jim Thompson

    Jim Thompson Guest

    Was it really that bad in Germany? By the late '60's I had
    transistors coming out my ears... even built a 30W stereo by 1967 ;-)

    ...Jim Thompson
  16. Phil Allison

    Phil Allison Guest

    ** OK - so we have another self confessed TROLL.

    A right PITA pommy one.

    ........ Phil
  17. John Larkin

    John Larkin Guest

    My first job interview, about '64, I told the guy that I preferred
    tubes, because they were free and hard to blow up. He sniffed "that
    won't do" and threw me out. Next interview, I said the same thing, he
    laughed, and he hired me. I designed about $150 million worth of stuff
    for the second guy.

  18. John Larkin

    John Larkin Guest

    I just googled "first silicon transistor." There's lots more.

  19. Eeyore

    Eeyore Guest

    When I was a teenager they were pretty new. I started off on germanium. I recall
    they used to cost 6s6d in old money (27p - but adjusting for inflation about £2
    or $4 in today's money) from the hobbyist suppliers back then.

    Late 60's I'd say.

  20. Eeyore

    Eeyore Guest

    The Alzheimers is getting worse !

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