Midnight 540 Fettling
I had a bit of a moment last night, I was on the way to bed, past my bedtime at about 12:30am… and I ended up messing with silver can 540s for an hour.
The one I’ve been using in mini this season is not the same one as last season, but they are both identical black-end Johnson 540s. This season’s just never seemed to have qute the same edge, even though looking through the slots the brushes seem a lot more bedded in.
So I ended up testing all three (including an old metal ended one), and true enough, last seasons seemed to sound the fastest when connected to a cell pack.
But oh no, that wasn’t enough, I then cleaned them all, motor cleaner, brasso, cotton buds, motor cleaner, re oiled bushings, comm dropped them. All three of them! It was now 1am…
Re-testing found them all sounding a little faster than before, I think, but last season’s still sounded the ‘brightest’. So it got refitted (I swear RC’s worst ever job is refitting a motor to an M03 mini…), soldered in and we’ll have to see how it goes on Wednesday night.
I can’t help thinking though, it still doesn’t seem to be totally run in, those brushes aren’t perfectly fitted to the comm, even though it’s had dozens and dozens of meetings, it was used by the previous owner for a year before I got it, I ran it for a year too. Should I pull it out again and try the old water (or better, Coca-Cola, apparently) dunking trick?
I got to bed at 1:30am, sigh…
Written by simon.
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