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  1. ante1

    Batteries Charger & PSU - for Cameras

    Sorry you are right now I see what you mean :o :o :o! The regulator is supposed to be connected as a constant current source! Ante ::)
  2. ante1

    Batteries Charger & PSU - for Cameras

    The regulator is connected as a constant current source not a voltage regulator! Ante ::)
  3. ante1

    70 volt regulator

    Quite often the things you connect to a PSU are equipped with big capacitors on their input. If you have a big capacitor on the PSU output it reduces the rushin current from the powerstage. The zener can easily be checked by connecting it in series with a resistor and measure the voltage across...
  4. ante1

    Who is using the oldest computer?

    Well mine is not in use so it doesn
  5. ante1

    Forum at Techlib.com is back

    Staigen, You have been busy, haven
  6. ante1

    Convert 0-30V 3A PSU to 5A or more

    Mastrilla, Sometimes a variac is not isolated from mains and in that case it is dangerous to use for a PSU. If you take a look here http://www.action-electronics.com/variac.htm#Vary you can see that only one out of five is insulated. When it is not insulated means that the secondary winding is...
  7. ante1

    Need Datasheet for D2065

    Hi John Some research in old books: 2SD2065 :NPN power/audio/switch ,140Volts 7A 80W Can be replaced with BD245D 2SC2706 2SC2837 2SC3907 Question : Does the 2SD2065 have an insulated case? One of my books states that the comparison type does not have insulated case, so makes me wonder :-\...
  8. ante1

    70 volt regulator

    Hi Kevin, Do you have a multimeter? If so why not measure the voltage over the Zener? Why do you think a large capacitor on the output is negligent design? Ante ::)
  9. ante1

    produce electricity using quartz cristals...

    Siddhu, While we are waiting........................ To charge any form of battery there are a threshold for the current/voltage. If there is not enough energy you cannot overcome this threshold and there will be no charging done. Ante ::)
  10. ante1

    Need Datasheet for D2065

    Well John, that
  11. ante1

    Who is using the oldest computer?

    Hi, That one runs on steam, right ? ;D Ante ::)
  12. ante1

    Need Datasheet for D2065

    And the other one! 2sc2837.pdf
  13. ante1

    Need Datasheet for D2065

    Oh, I forgot: Here are some datasheets for the nearest brother and for the equivalent one. By the way the 2SD2064.pdf
  14. ante1

    Need Datasheet for D2065

    Hi, John I found the info in a book, and now I found it on the net also: http://perso.wanadoo.fr/pouzou/site/composants/sd/2s2000.htm Good Luck! Ante ::)
  15. ante1

    Need Datasheet for D2065

    Hi It
  16. ante1

    Datasheet for LA76805

    Hi, You can try http://www.cmbcomponents.com/ Ante ::)
  17. ante1

    Convert 0-30V 3A PSU to 5A or more

    Hi mastrila, Do you have the variac directly between mains and your PSU circuit? If so is the variac you are using a full transformer model? Ante ::)
  18. ante1

    Service Manuals

    A great place for manuals and bulletins covering lots of different equipment: http://www.wimtv.be/techniforum/ Ante ::)
  19. ante1

    0-30 Vdc Stabilized Power Supply

    Hi mastrila, If C7 gets hot you probably got oscillation. The only way C7 can get hot is if it
  20. ante1

    produce electricity using quartz cristals...

    Must be some BIG crystals if they are used to charge batterys. Ante ::)
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