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peejay4A

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Posts posted by peejay4A

  1. Not necessarily. Https just means you have a secure connection and that your browser is happy with the site’s certificate.  An expired certificate can give those symptoms but that doesn’t seem to be the case here. 

  2. I agree with Mike.  A 1" hole won't allow you to see get an 8 point socket (you'll need that for the square plug) and extension onto the plug let alone get it back into place. With a 3" floor grommet in there it's a breeze once you've sorted out the carpet.  I just lift up the tunnel section of my carpet and there it is.

  3. On 6/3/2020 at 5:06 PM, ianc said:

    The instrument which we call the ammeter is really a voltmeter!

    On the back of the instrument is a low value resistor, called a shunt.  The value of the shunt (in ohms) is adjusted by the supplier to suit the scaling of the instrument, which is probably +30 to -30 amps.

    If the connection to the shunt becomes loose, the ammeter is likely to provide odd and inconsistent readings, and charging of the battery could be on/off.

    That said, I would agree that the likely culprit in this case is the regulator.

    I have noticed a number of posts stating that an electronic version of the regulator, which has the appearance of the Lucas box, seems to work very well.  In view of the fact that reproductions of the regulator seem to provide problems, if sticking with a dynamo, I would opt for an electronic version if I were unable to find an old (1950s/1960s) Lucas regulator.

    Ian Cornish

    That's true for a moving coil ammeter where a shunt is required to measure current.  The TR ammeter is a moving iron instrument and all the current passes through a few turns of very thick copper wire.  The resultant magnetic field deflects the moving iron which is attached to the pointer.  Even with a low resistance shunt, maybe to extend the maximum reading, the meter is still measuring current directly, but not all of it.

  4. While you’re looking into it make sure you have the correct type of  radiator cap. It should be bidirectional, having a small valve in the centre which opens to allow coolant back into the radiator when cooling down.  As Andy points out it should be a 7 lb cap and the overflow pipe should be immersed int the overflow bottle which should be 1/3 full when all is cold. Make sure that the pipe has a slash cut at the end so it doesn’t get sucked into the base of the bottle. 

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