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  1. CDRIVE

    Compression by the resistor

    I see nothing wrong with playing with discrete circuitry. After all they're the building blocks of ICs. In case you want to try driving your PC Line Input with your sawtooth osc. I've included a JFET Buffer and a Level Control (P1). Chris
  2. CDRIVE

    Compression by the resistor

    Don't expect clean tonal audio from your osc. The Sawtooth waveform contains a very fast falling edge that's rich in harmonics. Raspy audio is inherent with a sawtooth. Also, your osc freq in your other topic is only ~36Hz. Any test, observations, etc that you observe without the ground to...
  3. CDRIVE

    Guitar Amp Modification

    It wouldn't be the first device who's name is a misnomer. Chris
  4. CDRIVE

    Compression by the resistor

    It was more likely a bad connection. A bad connection in either node indicated by a red X would produce a voltage reading much like what you describe. I wouldn't toss the transistor until I was sure it was bad. Chris
  5. CDRIVE

    help with circuit design

    This circuit can be easily modified to fulfill your requirements. Chris
  6. CDRIVE

    Compression by the resistor

    Insure that the NPN & PNP aren't swapped. What model scope are you using? Chris Edit: The scope's vert input should be set to 1V/Div with direct measurement and 100mV/Div when using a 10x probe.
  7. CDRIVE

    I have no idea. Please help me.

    The circuit will be simple but 1.75" is a very long stroke for a small solenoid. You may have to employ a leverage mechanism to increase the stroke. Chris
  8. CDRIVE

    Circuit design help

    I wonder if this would work for your purposes. They get damn hot and plenty fast! http://en.wikipedia.org/wiki/Arc_lamp Chris
  9. CDRIVE

    Circuit design help

    Voltages high enough to jump a gap are not necessarily dangerous but if there's enough current available to generate appreciable heat you're in very dangerous territory. Chris
  10. CDRIVE

    Circuit design help

    Thank you!!! ;) OK, what exactly are you trying to do? It's not really clear to me. Chris
  11. CDRIVE

    Circuit design help

    I'm begging you to please loose that avatar. I simply can't read your posts because that thing is so distracting. Chris
  12. CDRIVE

    Is this true or false

    Actually I'm not so sure about that. This seems to be one of our favorite topics. We just need an official law of physics that this would fall under. :p Chris
  13. CDRIVE

    Is this true or false

    Better to heat water with the Sun. ;) Chris
  14. CDRIVE

    Is this true or false

    Then this this most certainly confirms the poor efficiency of solar panels because no solar panel is going to deliver anywhere near 1000W/sq meter of electrical power. Chris
  15. CDRIVE

    Is this true or false

    So how does this translate to available RF energy that can be rectified and stored? Chris
  16. CDRIVE

    Is this true or false

    Wow! Over 1000W / sqr meter (in space) is significant power! All we need is a long extension cord and we're good to go. :D If Ben Franklin only knew! :p Chris
  17. CDRIVE

    5U4 Rectifier tube

    Well in that case the OP better hurry back here. After all time may be running out! :p Chris
  18. CDRIVE

    5U4 Rectifier tube

    OMG! This may be contagious? :D Chris
  19. CDRIVE

    5U4 Rectifier tube

    It's not surprising that I missed that. If not for my wife Marilynne I wouldn't know what day of the week it is. :confused: I guess it's not important any longer. ;) Chris
  20. CDRIVE

    5U4 Rectifier tube

    Thanks Kris. On the up side if it's designed right the Zeners and Bleeder Resistor will only be dissipating power for less than 30 seconds. I guess another alternative could be a 555 driving a relay coil. The contacts would close and supply power to the caps & B+ line after timeout. If Edwin...
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