I just got this Bunn back from service. It was my great grandfather's watch, so I had it cleaned and lubed.
I hooked it up to my home-made timing grapher and got this (both watches are dial up):
Now, the amplitude is good, I think, but the beat error is poor. However, the signal in the "oscilloscope" looks like crap. No amount of gain setting can fix this.
Here is the same watch with the tracks:
So, here is my personal Bunn that I just "serviced" the balance wheel. I'm a complete newbie, but the signal on the timing oscilloscope looks more like what I would expoect:
So, why the stark difference in signals? The cases are different between the two watches, mine is a 1911 18s and my great grandfather's is a 1921 16s.
I hooked it up to my home-made timing grapher and got this (both watches are dial up):

Now, the amplitude is good, I think, but the beat error is poor. However, the signal in the "oscilloscope" looks like crap. No amount of gain setting can fix this.
Here is the same watch with the tracks:

So, here is my personal Bunn that I just "serviced" the balance wheel. I'm a complete newbie, but the signal on the timing oscilloscope looks more like what I would expoect:

So, why the stark difference in signals? The cases are different between the two watches, mine is a 1911 18s and my great grandfather's is a 1921 16s.
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