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Recent content by abs

  1. A

    Is there a simple way to make a NO dish antenna that can receive C-band or Ku-band satellite TV？

    Because the situation is deteriorating, I need an backup channel of information. Although the Internet is still the best way. But maybe one morning you wake up and the Internet won't be able to connect.This is not without precedent. Maybe I can cut the dish and make it square or triangular. Of...
  2. A

    Is there a simple way to make a NO dish antenna that can receive C-band or Ku-band satellite TV？

    For strange reasons. Receiving foreign satellite TV programs is illegal（Forbidden） in China. So I can't use a common dish antenna. It's too easy to be find out and :sick:. Is there any other form of antenna that can provide good camouflage effect?
  3. A

    Why do we usually use IF(Intermediate frequency) ?

    because IF filter is easy to make and wonderful proformance.
  4. A

    Is there any IC chip designed to be a Crystal Oscillator

    Thank you,but I means, The output of the Oscillator,must be "Pure" SIN wave, Not square wave for Digital Clock . the harmonic must be "very" low.
  5. A

    Is there any IC chip designed to be a Crystal Oscillator

    There are a lot of LC Oscillator Chip,(like mc12149).but is there any IC for Crystal Oscillator??? I want build an low phase noise Oscillator. If there any one can help.:-)
  6. A

    can FR-4 handle 25o watts?

    The Key is temprature.Not Power. Fr-4 can work at most 200oC.I think.
  7. A

    could Free Piston Stirling Engine be an cellphone charger???

    **broken link removed**
  8. A

    Any one have An ADVANTEST R3752AH

    Any one have An ADVANTEST R3752AH I have just got the R3752AH.but I could not use it well. Is there any may help. Thanks alot
  9. A

    could Free Piston Stirling Engine be an cellphone charger???

    It seems that We could get enough power by just heat one side of An Free Piston Stirling Engine. NASA researched .And Sunpower also. Could it be used as cellphone(or laptop) charger.So we can use Gasoline for power.
  10. A

    Help me Single freqency FM Receiver

    look for THE pdf of MC3361. It could do well.
  11. A

    Any one good at HF Radio receiver SET design

    Radio receiver design is My final Year Job. I can find a lot amateur radio receiver with google. but I'm want something HIGH QUALITY. exp: ALE SDR ... Any one good at receiver design? Thank you in advance.
  12. A

    Any one have An ADVANTEST R3752AH

    I have just got the R3752AH.but I could not use it well. Is there any may help. Thanks alot
  13. A

    Where can I get an CCD chip for high speed DSO?

    I am trying to update my Bitscope. It said that some of the Tek scope using a special CCD chip to acieve a high sample rate(more than 1Gsps). Is there anyone knows what this special CCD chip is,and where can I get those things.:?::?::?:
  14. A

    Digital oscilloscope Project

    [dso2.no-ip.biz:36]: It is a unfinished project, it is a 60Msps scope,I means it's an useful scope. could any one help to finish it. Or who can contect to the web master for more inf
  15. A

    Digital oscilloscope Project

    jyetech lcd manual pdf http://www.enetsystems.com/~lorenzo/scope/ Is there any one can help translate it?
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