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  1. CDRIVE

    Model engineer needs help

    Yes, if you want more than 20mV of hysteresis. Chris
  2. CDRIVE

    Model engineer needs help

    Actually if the OpAmp was perfect .. IE, swung from 0 to 5V, the feedback would be 20mV not 10mV. This because the OpAmp sinks when the output is low. That said you make a good point. There could easily be 20mV of noise at that node and drive the servo crazy. A 100K would be more effective and...
  3. CDRIVE

    Model engineer needs help

    It feeds back to the non inverting input, so it's positive feedback. Chris
  4. CDRIVE

    Model engineer needs help

    Is R16 for hysteresis? Chris
  5. CDRIVE

    Model engineer needs help

    Does this mean you're abandoning this? Chris
  6. CDRIVE

    Squeeze that battery

    This should handle any battery you can fit between the ram and the anvil. Yes, we need a Devil smilie. :p Chris
  7. CDRIVE

    Motor choice for mobil setup?

    Is the grinding station going to be permanently affixed to the truck? Chris
  8. CDRIVE

    diode for collapsing magnetic field

    Yes, I too need closure. :) Chris
  9. CDRIVE

    New valve amp build

    No, it dictates a basic law, just as Ohms Law does. The output impedance of your amplifier is not governed by the output transformer alone. Your finals have an output impedance too. Following 'Maximum Power Theorem' maximum power will be transfered from the plates to the speaker load when...
  10. CDRIVE

    Can you ID this transformer

    I feel a "Duh!" moment coming. ;) Chris
  11. CDRIVE

    Can you ID this transformer

    Like an idiot I Googled the part number. Anyone surprised I didn't get any hits? Chris
  12. CDRIVE

    Can you ID this transformer

    Doesn't the plate on the xfmr say 17V?
  13. CDRIVE

    New valve amp build

    Google "Maximum Power Theorem". Chris
  14. CDRIVE

    My New Toy

    CC, thanks for the input and the links. Wow, the stage lighting clamp pricing is in the ozone! Doubtful that they're Chicom imports unless someone is really inflating the cost. I thought it odd that items priced this high would have such a minimal description. "Black Anodized" isn't much of a...
  15. CDRIVE

    My New Toy

    I can't imagine why I forgot to mention this yesterday but here's one of many iphone incidents that I've encountered. My wife and I were riding on the sidewalk, single file. I'm the lead bike and I see two kids riding abreast heading toward us. One is on a BMX and the other is on a skate board...
  16. CDRIVE

    My New Toy

    Today I was searching for available light mounts that would accept those small aluminum LED flashlights (torch) that Harbor Freight and others sell. Well, I found quite a few handlebar mounts but none that will swivel laterally. While searching I found something else that's disturbing. That...
  17. CDRIVE

    LED insertion

    That's a good thing. It means I'm not going blind! ;) Chris
  18. CDRIVE

    LED insertion

    When I read the first lineI thought.. Oh sh!t my eyes are totally gone!! Chris
  19. CDRIVE

    My New Toy

    CC, the other day the wife and I rode over to our bank's drive through window. The talking head on the monitor told her she has to come inside the bank. When my wife inquired how the bank handles motorcycles the talking head said they're different! What the hell is that?! While inside the...
  20. CDRIVE

    My New Toy

    Yes, road water streaks up one's front and back are certainly an issue. I almost bought fenders for my wife's Pure yesterday but without actually seeing them installed on this bike I was reluctant to commit. The Pure has beautiful lines and I don't want to corrupt them with something that looks...
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