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DeTRacted

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  1. Trigger Wheel Mounting Vitesse

    Yes it looks like the sensor is probably OK John. The peaks may well be ten times as large as your meter says. Rob
  2. Trigger Wheel Mounting Vitesse

    A VR (variable reluctance) sensor is basically just a coil would round a magnet. Very little to go wrong and you can can do a basic check easily by measuring for coil resistance between the connector pins. In your test you may be being fooled by your multimeter - I guess its a digital one which you have set on AC volts? The output of the sensor will be spikes which the multimeter cannot handle properly because it is calibrated for sine-waves. It is probably reading the average of the spikes which will be quite low. You really need an oscilloscope for that test. Rob The 'sort of' sinewaves shown on the TriggerWheel site are at 10000rpm where everything has smoothed out due to time-constants. At 160 rpm the waveform won't look like that at all.
  3. Trigger Wheel Mounting Vitesse

    A VR (variable reluctance) sensor is basically just a coil would round a magnet. Very little to go wrong and you can can do a basic check easily by measuring for coil resistance between the connector pins. In your test you may be being fooled by your multimeter - I guess its a digital one which you have set on AC volts? The output of the sensor will be spikes which the multimeter cannot handle properly because it is calibrated for sine-waves. It is probably reading the average of the spikes which will be quite low. You really need an oscilloscope for that test. Rob
  4. Trigger Wheel Mounting Vitesse

    Go to Maplins John - they sell in singles. https://www.maplin.co.uk/p/metal-film-06w-1k-ohm-resistor-m1k Rob
  5. Trigger Wheel Mounting Vitesse

    Grounding and shielding of circuits can seem more of a black are than a science. What it is trying to achieve is to prevent pickup on the protected (shielded) wires from external sources of electrostatic noise. A continuous wrap like copper foil does this better than braided cable, and forms a partial Faraday screen (partial because of course you cannot close the ends ). For this to work properly it is important to prevent noise currents circulating in the shield itself since these can couple noise magnetically into the wires, so the shield should be connected to earth only at one point. More than one ground will result in a ground loop a.k.a. earth loop. That is also the reason for the note about grounding everything at the same point, since in radio-frequency terms different points on the bodywork will be at different potentials.
  6. This quote from the Revington website re the 4 pot engine: Q: If I fit a plastic fan to the original fan extension or remove the fan and extension altogether, would I be risking crankshaft breakage or damage due to changing the dampening effect of the original fan/extension arrangement? A: Irrespective of whether you use a wobbly aluminium fan or a wobbly plastic fan, the effect is the same. It helps (just) to cool the engine and that is all. In our opinion the amount of damping it offers is negligible. Dampers have been in use since the 20's where necessary. If Triumph (one of the largest sports car manufacturers in the world at the time) thought is was necessary they would have fitted one. We have been building TR2-4A engines with no fan and no extension for 25 years with NO broken crank related failures. As a result we are quite happy that an engine in good shape, from standard up to all bar the highest revving competition engines should not suffer ill effect by having the fan substituted for a later TR6 plastic type or having it and the extension removed altogether. If you do remove the fan altogether we recommend using a properly designed washer and bolt arrangement to hold the pulley to the crankshaft.
  7. The other side of the argument: https://notalotofpeopleknowthat.wordpress.com/2017/08/15/claims-of-40000-deaths-from-air-pollution-debunked-by-death-statistics/
  8. I think we need to take these BBC things with a pinch of salt Darren. According to this website there are not that many measuring points across the UK: https://uk-air.defra.gov.uk/latest/currentlevels?view=site Is ther one in your village ? because if not they are just quoting the nearest site which could be miles away - so the figure would be meaningless.
  9. Sunday Scramble

    Its a (replica) BE2C Tim. Based at Stow Maries in Essex I believe.
  10. Sunday Scramble

    Funnily enough the same feeling here. Its not far from me at all but I have decided that once a year is sufficient and now reserve that for the longer and warmer days. For those who haven't been - its not only cars that get there.
  11. Driving Habits Of The Aged.....

    You're dead right on the last bit Peter. Always a big consideration - particularly in cold weather !
  12. Driving Habits Of The Aged.....

    Lucky sod. In deepest Berkshire even the smallest rural roads are choc-a-bloc. Many cars being driven by people who have no idea how big (or not) their cars are and by small women in Chelsea tractors who can barely see over the wheel.
  13. Surely doesn't count Peter as not road-registered? How about this, - 20 raging horsepower and just over 60 flat out, if you are brave enough.
  14. And yet another..

    Since a lot of the TR regulars have decamped here I though I should join in the fun. The name's Bob (posting back there as RobH) - owner for ten years of a '59 TR3A which is currently awaiting a clutch change, and of a 1930 MG M type. I guess I will be a lurker rather than much of a poster, at least until I get the hang of the place. I'm a retired professional electronics and instrumentation engineer so one of the grey-beards I'm afraid.
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