SOHC.co.uk Forums > CB500/550
Electronic ignition
Sesman:
;D ;D ;D ;D
Laverdaroo:
;D ;D
royhall:
Okay I will zip it.
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K2-K6:
--- Quote from: deltarider on January 19, 2022, 02:29:45 PM ---
--- Quote from: K2-K6 on January 18, 2022, 05:45:18 PM ---Essentially the switching transistor takes all of the load itself with no need of condenser to mitigate. The "fault" side of the points that the condensers are there to control doesn't go away (as are most things in physics) it just comes out as heat from that transistor which has to be adequately dispersed to avoid failure of that component. Two different sides of a square in carrying out the same task effectively.
--- End quote ---
I am not sure, I can share your view. First of all, the 'heat' at the back of the power transistor is hardly there. I mean, I can practically hold my finger there. The condenser is there to dampen possible 'hesitation' of the breakerpoints in their opening and closing and so prevent the transistors interpreting all of these 'hesitations' as switch moments. it would result in multiple switching by the power transistor, which in its turn would produce erratic sparking, that is: if there would be anything left to spark from...
The condenser is there to make sure the transistors receive one - and only one - clear signal.
--- End quote ---
"As said, I've abandoned the heatfins, which are an exaggeration IMO and have used the bottom and the lid of the alu box to let the power transistors dissipate their heat."
From your post #100 there will always be a byproduct, however the size of it manifests. It may be less or more at any one point in a system (denoting efficiency of that system relative to another) but it won't go away.
K2-K6:
--- Quote from: deltarider on January 19, 2022, 08:26:23 PM ---Back then, I had no choice than to make my own. All products that I had seen (Piranha, etc) were not to my liking. For my travels I wanted something robust with a guaranteed simple back up, other than eventually having to apply for a new black box in farawaygistan and then possibly having to wait days for the thing to arrive. In particular I didn't like the positioning of the electronics. Mine are high and dry - I can cross a stream with it - and they see no higher temperature than ambient. They are shielded against vibrations and moisture. And there's the joy of making the thing yourself ofcourse. :D
--- End quote ---
Curios about the logic here. Starting with a Honda system that was effectively peerless when contemporary, placing another whole system to be more reliable? with the original as backup, appears inverted in straight mechanical logic. Backup contingency would surely be two sets of points and two condenser stored on the bike perhaps (maybe in the headlight shell to be always available) and you'd never be stranded such that requirements of outside assistance is necessary.
I get that the electronic systems can reduce the duty load of the original points, but many of these in period additions where constructed and sold on attributes that will definitely improve a number of elements on car distributor systems that never existed in the Honda 4 cylinder ignition systems in the first place.
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