[time-nuts] Fluke Thunderbolt Monitor Revisited
danrae at verizon.net
Sat Jun 5 15:16:35 UTC 2010
GandalfG8 at aol.com wrote:
> 3...The series input and base to ground resistors on the RS232 interface
> are both 180 ohms, rather than 10K and 3K3 respectively as in Didier's
If one wanted to use the RS232 interface to a computer at the same time
as the ko4bb monitor in parallel, which I often do, then you would be
well advised to stick to Didier's original values there. RS232 is quite
robust, but still... I built one here quite early on to the original
design and it has performed flawlessly ever since.
I can not for the life of me figure out what oriental logic dictated
these changes in the first place.
And well done Nigel for getting to the bottom of this!
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