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  1. (*steve*)

    Question long term storage batteries

    Can't you remember all your aliases cloudffps1/electroenergy? As I've suggested before, seal them in a large steel drum, embed that in concrete and place it in the deepest ocean trench you can find.
  2. (*steve*)

    Question long term storage batteries

    Hello johnmullins/gamer88
  3. (*steve*)

    VARIAC? With valves!

    ...And Thanks to Martin of Lyons Instruments, I have a little more information: This was a early type of Voltage Stabiliser manufactured by Claude Lyons prior to the Servo Mechanical designs. Very interesting to see this although I am sure I have seen pictures of it on an old Claude Lyons...
  4. (*steve*)

    Another VARIAC!

    Interestingly enough, I have found a site that sells very similar brushes. But more importantly, they also offer to "re-tip" existing brushes. This may be extremely useful because my brushes are similar, but not the same. http://www.carbonbrush.com/variacbrush.htm (see VB-1 brushes)
  5. (*steve*)

    Help diagnosing AC Sliding gate controller stops halfway

    Hmmm, Typically the limit switch is used to indicate the end of travel. Does it illuminate when the gate is opening? Is there a switch that indicates that the gate is fully closed? It might be worth checking it and its wiring.
  6. (*steve*)

    Help diagnosing AC Sliding gate controller stops halfway

    Added to the above, the board seems to have a safety reverse. I presume this reverses the gate's motion if it is blocked by something. Please check to see if this still works. If it does, it tends to indicate the gate is not simply getting stuck, because it would try to re-open. And you...
  7. (*steve*)

    Another VARIAC!

    Here's something else that has turned up. A baby VARIAC with an interesting control mechanism. Looks like 60 to 85V 50/60 Hz 1.5A The knob pushes/pulls the slider using a metal tape. There's 2 brushes, which is a bit odd. And that's where the problems is: One of these brushes is...
  8. (*steve*)

    VARIAC? With valves!

    I've sent an email to them with a couple of photos. Maybe they'll get back to me.
  9. (*steve*)

    Horrible TV Audio and Video Lately

    Yeah, it's called sufficient bandwidth, a good microphone and preferably a good camera too.
  10. (*steve*)

    VARIAC? With valves!

    I just came across this rather interesting piece of equipment. I claims to be a VARIAC, but it's not like one I've seen before. It has no controls other than an input lead and an output socket. Oh, and a power switch. Inside, it's more interesting Three tubes, what looks like a...
  11. (*steve*)

    Fat laser beams...

    Well, the theory is that the beam width is so wide that the amount of power that can enter your eyeball is within safety limits. I'm not sure what effect it will have on beam spread over distance, however, a simple laser pointer on the ground at night is visible from the ISS of it is carefully...
  12. (*steve*)

    And now something weird

  13. (*steve*)

    Help with measuring AC current

    Try measuring the current at 60Hz It may be that your multimeter can't handle higher frequencies well.
  14. (*steve*)

    Testing TVS diode

    Well, a spike above 23V will be clamped to about 23 volts. It won't be clamped to zero volts.
  15. (*steve*)

    Testing TVS diode

    I had a bit of fun characterizing a TVS diode. Essentially, I tested it the same way you would test a zener. Connect it up to a current limited voltage source and measure the voltage across it at various currents One thing I suggested on the devices I tested is that they are very temperature...
  16. (*steve*)

    How to keep a pc monitor on with out any connection

    The inverter board will usually have an "enable" signal to turn on the backlight. That part is easy. However, without a signal, the LCD will be opaque. The "easy" answer is to remove the LCD panel, leaving all the other layers of the screen intact. You'll probably end up with a kinda floppy...
  17. (*steve*)

    JVC 60" LED Tv problems

    Pin 10 is an input. My next step would be finding out what generates the shutdown signal. Is there a fault there?
  18. (*steve*)

    Identify part please

    The chance that this is the entire fault rounds to approximately 0% This is the result of either a long term significant overload, or a failure of something that caused excess current draw. If this had failed quickly, the board would likely be less charred.
  19. (*steve*)

    Feeding load with two 220V AC power supplies to reach uninterrupted power supply.

    Jealousy. Some of us are so old that 1993 seems like last week.
  20. (*steve*)

    15 pin Sub-D power supply/control help

    You know, sometimes there is someone here who has worked with your exact device and can give you information on a way that seemingly reads your mind. More often, we need sufficient information to give someone a useful answer. When we ask questions, there's almost always a reason for them, and...
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