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  1. Martaine2005

    help with variable speed motor

    Why do we have 'Spoiler'?. This isn't a quiz..... Martin
  2. Martaine2005

    help with variable speed motor

  3. Martaine2005

    How would a twisted pair effect a signal

    The process of twisting pairs is to limit 'crosstalk' on data lines and limit EMI (noise). It will have no effect on what you are doing as all the members here have already told you. Try a pair, try a twisted pair.. You will see no difference. Now, high resistance is another issue. But again, as...
  4. Martaine2005

    Treadmill control board check and repair

    Hello, and so do we.... You will need to provide lots more information about your particular treadmill including close-up, clear photos of the control board. The most basic form of over current protection is a fuse. Perhaps your control board has a fuse for the output drive to the motor. Martin
  5. Martaine2005

    Weiss FM demodulator

    Google Translate? Just trying to be helpful. Martin
  6. Martaine2005

    PIR Motion Sensors and Halloween animatronics

    You will probably find that the 'try me' button or plug is just a 'jumper' with a N/O push button switch. So basically just bypassing the normal ON/OFF switch. Martin
  7. Martaine2005

    Weiss FM demodulator

    Ah ok. That circuit is on a Spanish website 'Radioaficion'. Why not use their 'Mini chat' service y hablar. There are thousands of circuits online that do not work. Might be why there is no info on this particular circuit. Martin
  8. Martaine2005

    Weiss FM demodulator

    Yes, that's true. I know what FM modulation/demodulation is but what is Weiss? What are you trying to achieve? Anything to do with metal detectors? as in discrimination or detection? I am just curious. EDIT: I just read this in Wiki.... Other FM detectors Less common, specialized, or...
  9. Martaine2005

    Tenma Oscilloscope Model 72-320

    You can get the manual from here. I am not sure if you have to pay though, I didn't call them. You can use their live chat to ask. I found that newark . com have them from this site. Hope it helps. Martin
  10. Martaine2005

    Conservation CD and DVD optical medias

    I wonder how long this will go on for? I think we're being played :p
  11. Martaine2005

    hi there

    Me too John, Hello and welcome to Power Factor.... Oops, Physics Forums. Oops, wrong forum, EP, Call me back on same number!.:p Martin
  12. Martaine2005

    Conservation CD and DVD optical medias

    Cryogenics might be your only answer. This goes against everything you know. Your normal freezer wont cut it at 0.4-12c. Get a Silica gel enhanced Neocrydium sulphaticum gel pack. Not only does the process of removing rust (oxidation) and age compensating chemicals (rejuvenation) of your 80s...
  13. Martaine2005

    characteristics P6KE200A

    There is an article on testing a TVS that @Harald Kapp linked to a few years back. May be of use to you. Martin
  14. Martaine2005

    Metal Can VS ceramic transistors or plastic transistors

    This is an old thread but still funny. Just *loop* him back to his original question.:p Martin
  15. Martaine2005

    Repairing an old radiation detector.

    I agree. However, if you are going to re-cap, check all resistors too. They are probably fine but some might have drifted way out of tolerance. Martin
  16. Martaine2005

    Unknown MOSFET specs datasheet

    You could try omitting the first letters like here. Then add search terms after like here. Have a play and don't forget to check 'images'. You may spot what you are looking for. EDIT: forgot to mention that a photo would help too. Martin
  17. Martaine2005

    Repairing an old radiation detector.

    Ok, lets assume it was functional before. 40 years later, somebody powers it up. Obviously calibration wont be the same. The main reasons would be the caps. Martin
  18. Martaine2005

    Repairing an old radiation detector.

    That would be my first initial observation. Are you looking at restoring or just repairing?. Martin
  19. Martaine2005

    Repairing an old radiation detector.

    Well, for starters, those caps are nearly 40 years old. Martin
  20. Martaine2005

    Wrong wiring??

    Why can you not get these anymore? It is only a panel/chassis mount momentary switch. Perhaps you kept that switch on for longer than the specified time. More than likely. My thoughts exactly. Some items/devices have the neutral switched too via a DPDT instead of the usual SPST switch. Martin
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