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  1. Minder

    Why are mains plug pins usually made of brass in the UK?

    That's possible, In N.A. there is no fusing in the plug and pin area is smaller. M.
  2. Minder

    Why are mains plug pins usually made of brass in the UK?

    Many of the plugs here are just plain brass, some plated brass, I think it has to do a lot with the better contact area with N.A. plugs. Also I did observe the UK plug pins were rough rather than smooth finish, at least back then. M.
  3. Minder

    Why are mains plug pins usually made of brass in the UK?

    Not sure the reason, but one thing struck me as odd, being an electrician in the UK I came across quit a few outlets where the plug had overheated, this in spite of the large contact area and the lower current for a given load than a 120v system. When coming to Canada and observing the smaller...
  4. Minder

    Speed controller

    The difference in cost with the 555 is fairly minor, the ebay one's are all ready to go, but you wait 1 month at least on average. M.
  5. Minder

    Homemade 555 Tachometer

    The spec sheet for the LM2907 has the application details. M.
  6. Minder

    Homemade 555 Tachometer

    Check out the LM2907, it was designed for this application. M.
  7. Minder

    Speed controller

    Dimmer will work with a bridge rectifier but may be too low voltage, here is a 555 solution. http://www.discovercircuits.com/DJ-Circuits/simplepwm2.htm You can increase to 12vdc M.
  8. Minder

    KJD 17 wiring to 230vac single cap motor question.

    Many PSC motors have identical start/run winding's, making it easy to reverse, yours could be one of these. It is usually easy to detect the difference on the type with unique run/start winding's. M.
  9. Minder

    KJD 17 wiring to 230vac single cap motor question.

    Unless highly loaded it should not really be slow to start, are you sure you have the correct winding in series with the cap, as each winding is different. M.
  10. Minder

    How To Prevent Short Circuit With A Simple Wire From One Outlet Prong To The Other

    Well obviously the fuse suggestion would work, or if you want a reset-able device then use a reset-able breaker. M.
  11. Minder

    Failure on oven control board

    I just recently repaired an almost identical board, you need to remove it to see any flash over damage on the reverse side. In my case it was a flash over from one foil to the next adjacent to a relay terminal pin, I replaced the relay ($2.50) just in case, and after repair I coated the foil...
  12. Minder

    How To Prevent Short Circuit With A Simple Wire From One Outlet Prong To The Other

    What is the reason for using such a device in B? M.
  13. Minder

    Vacuum Tubes

    ONE of today's .... M.
  14. Minder

    Small Question

    Hey feel free to do what ever you want to do. Let us know how it goes.;) M.
  15. Minder

    KJD 17 wiring to 230vac single cap motor question.

    I can see why it blew the breaker with the cap across the supply as well as not getting it rotating. If you were to spin the shaft it most likely would run without the cap , either direction. The motor is most certainly going to have two winding's, start and run, the cap has to be in series...
  16. Minder

    KJD 17 wiring to 230vac single cap motor question.

    You should have two winding's on the motor start and run, usually the common point is internally connected if only one rotation dir need. Making 3 leads, 2 for AC in and the other for seiries'ing the cap with the live. The capacitor should be in series with the higher resistance winding. M.
  17. Minder

    Vacuum Tubes

    In a simple triode amplifier Cathode-Grid-Anode, the higher the grid voltage the higher the tube current. So in this respect it is amplifying. The vacuum tube demonstrates electron flow, negative to positive, which is in contrast to what is known as conventional flow in circuitry, of Positive to...
  18. Minder

    Very Old Components I Can Not Identify.

    The ones shown in the 001.jpg, do they register with a meter across opposite leads of the IC? are they identical component packs of diodes or resistors etc? M.
  19. Minder

    Vacuum Tubes

    The first detection of the vacuum tube effect was when it was discovered that when a light bulb was lit a cloud of electrons boiled off from the element, it was then discovered that if a plate was introduced and a +ve voltage WRT the element (cathode) was introduced to the plate, the stream of...
  20. Minder

    Relay Help!! 24v to replace 18v?

    You can get qty10 18v relays for just under $9.00 on ebay, you may have to get creative and shoe-horn it in. If it is just using the N.O. contacts you can cut the N.C. pin off. M.
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