Pete Lewis Posted April 5, 2022 Report Share Posted April 5, 2022 the old rule "if at first you dont succeed."..........try a bigger Hammer Pete Link to comment Share on other sites More sharing options...
Badwolf Posted April 5, 2022 Report Share Posted April 5, 2022 Love it. Link to comment Share on other sites More sharing options...
johny Posted April 5, 2022 Report Share Posted April 5, 2022 3 hours ago, Wagger said: I am a retired Electrical and Electronic Engineer. Believe me, Potted or Integrated circuit components still fail AND it is not possible to find out which component is faulty without access to every NODE. At least one can fault find a points system in a layby. I made my first system with descreet components and could fix that, but only on the bench. Oh I know ICs fail (and then are very difficult to fault find) but I was postulating that its not usually an intermittent failure unlike older circuits where tracking or component breakdown can give problems under certain conditions and then apparently recover... Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 5, 2022 Report Share Posted April 5, 2022 these rules were indoctrinated into my 1st year apprenticeship same as "lad you will find out there 40 years of experience" some will have 1 years experience 40 times and some will have 40 years experience once how true is that Pete Link to comment Share on other sites More sharing options...
Wagger Posted April 5, 2022 Report Share Posted April 5, 2022 3 hours ago, johny said: Oh I know ICs fail (and then are very difficult to fault find) but I was postulating that its not usually an intermittent failure unlike older circuits where tracking or component breakdown can give problems under certain conditions and then apparently recover... In the 1970's a dual Opamp appeared rated at 500mW. The Texas Instruments version was 400mW. It would heat up and shut down, then recover if switched off and llowed to cool. I outlawed it in all of my designs. Link to comment Share on other sites More sharing options...
johny Posted April 5, 2022 Report Share Posted April 5, 2022 yes that old gear could do strange things but think the modern stuff just tends to blow up when it fails☹️ Link to comment Share on other sites More sharing options...
Badwolf Posted April 7, 2022 Report Share Posted April 7, 2022 Posted this some time aback. The insides of a Sparkrite SX4000 electronic ignition unit. Distinctly underwhelming... ..and in my case unreliable after trying two units. Link to comment Share on other sites More sharing options...
Chris A Posted April 7, 2022 Report Share Posted April 7, 2022 BW: why the switch?? Link to comment Share on other sites More sharing options...
johny Posted April 7, 2022 Report Share Posted April 7, 2022 Uses the exisitng points as the trigger so you can switch between that mode or points operating as normal. Construction looks robust enough to me for the application although of course switch could suffer from moisture ingress... Link to comment Share on other sites More sharing options...
george Posted April 7, 2022 Author Report Share Posted April 7, 2022 Thank you too all whom have contributed to this thread, I believe that the problem that I had arose from a faulty rotor arm. I have since replaced it and the car now runs well. Link to comment Share on other sites More sharing options...
Badwolf Posted April 7, 2022 Report Share Posted April 7, 2022 1 hour ago, Chris A said: BW: why the switch?? Electronic or conventional. A simple either or switch over.....whoops, Johny beat me to it. Though that I'd posted this but it didn't send originally!!! Link to comment Share on other sites More sharing options...
Chris A Posted April 7, 2022 Report Share Posted April 7, 2022 1 hour ago, Badwolf said: Electronic or conventional. A simple either or switch over.....whoops, Johny beat me to it. Though that I'd posted this but it didn't send originally!!! Best or worst of both worlds then 😁 but at least there is a backup in place. Link to comment Share on other sites More sharing options...
johny Posted April 7, 2022 Report Share Posted April 7, 2022 Its a pretty good arrangement as the points gap doesnt matter, they just have to open at the right moment. Then theres no sparking so the contacts dont deteriorate and the only variable is down to the points operating heel wearing which is countered by adjusting the timing once in a blue moon. For me the only downside is that the unit has be mounted remotely somewhere... Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 7, 2022 Report Share Posted April 7, 2022 5 hours ago, Badwolf said: Posted this some time aback. The insides of a Sparkrite SX4000 electronic ignition unit. Distinctly underwhelming... Must be a more modern version than mine, then... the switch on mine is tiny although it's only the SX2000 version. It clamps onto the coil, so handy to fit. Link to comment Share on other sites More sharing options...
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