1982 function generator kit found ?

Discussion in 'The Projects Forum' started by JohnTF, Apr 19, 2010.

  1. JohnTF

    Thread Starter New Member

    Apr 18, 2010
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    Found this in cleaning out a hams storage , it is a kit in several plastic bags , one board was assembled , a couple LEDs , resistors & wire , the rest was still in bags , one power supply board , then the board with many components , ICs adjustable capacitors , started putting together some of the most obvious .
    Then ran into questions , tried to find info on net , part of which got me here .
    Have not been able to get anything off net that seemed to match , but seeing that the parts list , said 1982 , maybe too old .
    I will take some pictures to help in identifying when I get home .
    Thanks John
     
    Last edited: Apr 19, 2010
  2. SgtWookie

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    1982? Perhaps it is a Heathkit? Those were very good kits, and lots of documentation is still available.

    The best way to photo things like that is outside on a cloudy/overcast day. The light is very bright, but very even - there are no harsh shadows. Direct flash is the worst way to take photos of electronic boards. You need diffused, even lighting.
     
  3. JohnTF

    Thread Starter New Member

    Apr 18, 2010
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    Most of the Heathkit stuff I have seen , they put there name on it .
    Hope these help ?
     
  4. beenthere

    Retired Moderator

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    Not Heath stuff, but looks like an old ICL8038 based kit.

    If you get the data sheet for an 8038, it probably will show you what component values go where.
     
  5. SgtWookie

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    Gosh Beenthere - how could you tell that?

    The images are so small I can barely make anything out.

    It would be really helpful if you could post some larger photos, and scan the parts list.
     
  6. VoodooMojo

    Active Member

    Nov 28, 2009
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    i believe the parts list calls out a 741 op amp
     
  7. beenthere

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    Sheer guesswork - but '82 is a good year for 8038 kits, and the foil that connects the two pins together is right for an 8038. You tie pin 7 to 8 for continuous operation.
     
  8. t06afre

    AAC Fanatic!

    May 11, 2009
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    The 8038 was also most common in CERDIP package. And I think the large IC is a CERDIP as it is grey(ish) and not black
    By the way almost all oscillator circuits has been pulled from the market, with no replacement. I wonder why
     
  9. SgtWookie

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    Digital synthesis. The market is not driven by hobbyists. You can create any arbitrary waveform using digital synthesis using far fewer components than you can with analog components. But, it's rather difficult for hobbyists to use the newer techniques.
     
  10. JohnTF

    Thread Starter New Member

    Apr 18, 2010
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    beenthere , Thats correct I should have put the info on the chips , Intersil ICL8038ccjd 8207 , other NE531N S 8224 .
    Did some more searching with some of what was mentioned here , still have not found ?
    Now that I look at the parts list , it does not match .
    Thanks again so far .
    John
    Some more , on the back side of all boards is TNG 8-0 , R [ is reversed ] A
     
  11. SgtWookie

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    The NE531 is a high slew rate opamp; 35V/uS.
     
  12. SgtWookie

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  13. JohnTF

    Thread Starter New Member

    Apr 18, 2010
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    Here's the pictures before re-sized them .

    That didn't work well , back to the camera .
     
  14. kingdano

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    Apr 14, 2010
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    relatively high ;)

    some op-amps have slew rates as high (or higher than) 1000 V/us
     
  15. SgtWookie

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    For the 1980's, it WAS a high slew-rate opamp. ;)

    And if you had a 386 PC running at 25MHz with 16MB RAM and Windows 3.1, you were rockin' :D
     
  16. kingdano

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    The first PC my dad bought was a 386 PC...only 8MB of ram...windows 3.1 though!
     
  17. SgtWookie

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    My 1st "personal computer" had 4K RAM, 4K ROM, Level I Basic in ROM, a Z-80 CPU at a blazing 1.77MHz clock rate, and a cassette deck to save/load programs. ;)
     
  18. t06afre

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    It is still somewhat unclear to me what the OP want to achieve in this thread.
     
  19. kingdano

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    was it a nice space heater as well?
     
  20. SgtWookie

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    My cat thought so. She would lie on the vent grill where the heat came out, blocking it entirely. :rolleyes: Got nice and warm for her.
     
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