I can post a schematic, but in fact it will be two schematics - a delta against the original so that the existing boards can be utilised or upgraded, and a clean one. Fe channel correction performs so good, and you only need to violate two LM339-s to enjoy it. I don't know - maybe the best way to present everything would be to go through mods and explain what they do.
Regarding EMI, I think this area is quite quiet, but truth is - I have no other rig to compare this one with. I'd say most of the chatter is self-produced, mostly when batteries are running on fumes. This would be a weak spot of this design. I'd say that an oscillator that would run more symmetric would kill most of the chatter. I kinda expected this - it is the PWM problem.
In a moment of epiphany I realised a perfect mount for the device on the shaft. So it became complete. OK, a few washers wouldn't hurt, but a nut and a screw just proved the concept.
I have a silly notion of giving names to all devices at home, and i christened this one "Raskov 2012". Have a look (temporary straps are still on the probe):
Regarding EMI, I think this area is quite quiet, but truth is - I have no other rig to compare this one with. I'd say most of the chatter is self-produced, mostly when batteries are running on fumes. This would be a weak spot of this design. I'd say that an oscillator that would run more symmetric would kill most of the chatter. I kinda expected this - it is the PWM problem.
In a moment of epiphany I realised a perfect mount for the device on the shaft. So it became complete. OK, a few washers wouldn't hurt, but a nut and a screw just proved the concept.
I have a silly notion of giving names to all devices at home, and i christened this one "Raskov 2012". Have a look (temporary straps are still on the probe):
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