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Recent content by MRIguy

  1. MRIguy

    How does a Clutch bearing work?

    Thanks Philrock: The bearings were working well before but now are slipping. So I assume all the alignment ands upport were ok at one time. Can these types of bearings wear out over years of use? If so can I just replace them and hope for the best. Or do I need to turn down new shafts and...
  2. MRIguy

    How does a Clutch bearing work?

    Hi Guys: I'm a EE ( sorry!) trying to understand how roller clutch bearings work. Knon of any sites that have a "how to" on these parts? I have a Torrington roller clutch on a piece of old exersize equipment that in now "slipping" ( backlash?) in the torque direction. I'm not sure if the...
  3. MRIguy

    Simple low freq Am modulator

    When I get to that part , I'll post it. Thanks sreid I do not need absolute DC readings. Just the change over time. I need to get the info out and locally stored so AM was the choice for simple implementation and remote transfer. I can pretty much dial out the DC at the load cell, so the...
  4. MRIguy

    Simple low freq Am modulator

    The AD633 is first on the list, thanks sreid. I do have a copy of the Analog Devices handbook ( now you know I'm an oldtimer!) that is where I got the multiplier idea, thanks John I found another IC used for feedback generation, a Unitrode UC1901. It has an on board osc., multiplier, and...
  5. MRIguy

    Simple low freq Am modulator

    Thanks John; I was planning to use the carrier of 1KHz, the modulation is signal from a slowly changing (< 50 Hz) pressure transducer. Pretty much DC. I'm stuck with this low freq app. due to some systems issues. I usually do RF circuits and I have used DGFets, but I was hoping for an op-amp...
  6. MRIguy

    Simple low freq Am modulator

    Looking to xfer some low varying DC data. Tired V to F converters and they proved problematic. Thinking of simple AM scheme. Looking at Gilbert cells/multipliers but is there a simple op-amp type AM modulator circuit? Ralph
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