I´d be interested to hear about these regulators to go with the Altons. My first test with typical motorbike regulators was appalling: The alternator heated up in minutes to unacceptable degrees, the regulator as well. Some sets are obviously designed for good ccoling and oil cooled alternators on the bike. That is because of a primitive design in the regulator: When voltage reaches limits the regulator shorts one phase in the alternator. This puts high load on alternator and produces a LOT of heat. Plus you never get a lot of extra power from the alternator as all electric power gets cutoff at 14 V . So my idea was to go for these converters that I tested on my jig , see below. No critical heat after half an hour with 200 W quartz bulb loads, no extra ccoling in my workshop, 60 degrees max. on the alternator. So I can recommend this set, just you need a three phase rectifier (for 3ph Alton ?) , bolted to a piece of alu for a bit of heat sump, plus the converter and you get some more power out of the Alton. No need to find an open place for components, I ´d think about somewhere behind gearbox, under battery or so.
Also, I´d like to know how the windings in the f***d Altons look, any colours of overheating/burned varnish ? This may be a sign of poor regulator tech, unlike my set - which is not hearsay but benchtested. Lots of suitable gear for this available from Aliexpress, at a fraction of costs . So you could have some spares for the price of Alton stuff. The basic set can be hooked to any permanent magnet alternators - like Lucas types on Commandos with their Zeners - as the alternator is not affected at all by the converter. You just let the power unit output whatever it can and only in last stage the voltage gets reduced to 13.8 V for charging the bike.
It does not matter if 3ph or 2ph alternators are connected, you just pick a suitable rectifier , 3ph or not, and behind it comes the converter.
Vic
20 A converter
280 W converter
The filter has removed all the symptoms.
