Re: [time-nuts] Tuning a Trimble Thunderbolt

2015-04-21 Thread Pete Stephenson
On Tue, Apr 21, 2015 at 12:08 AM, Bob Camp kb...@n1k.org wrote: Hi Expecting that unit to meet holdover after only being locked for 12 hours is not a reasonable thing. So it would seem. Perhaps I was being a bit optimistic for out-of-the-box performance: the brochure listed the holdover

Re: [time-nuts] New +/- 1 sec in 100 days mech clock

2015-04-21 Thread Peter Torry
You could always use the traditional method of piercing saw and files. Thinking about it I suppose files were the original milling machine. Be aware that the horological approach is different from the engineering approach and there are numerous traps waiting for the unwary. Harrison and

Re: [time-nuts] New +/- 1 sec in 100 days mech clock

2015-04-21 Thread Don Latham
I saw Harrison's number one (its replica?) at Greenwich some time ago. It is a dual pendulum, 180 out of phase. I remember a lot of springs. Don Peter Torry You could always use the traditional method of piercing saw and files. Thinking about it I suppose files were the original milling

Re: [time-nuts] Tuning a Trimble Thunderbolt

2015-04-21 Thread Bob Camp
Hi inevitably on these devices, there is a marketing brochure that hits the high points in the specification. That information is public and intended to get “buzz” going on the product. Once an OEM gets serious about the product, (the TBolt is targeted at OEM’s) a detailed specification gets

Re: [time-nuts] Tuning a Trimble Thunderbolt

2015-04-21 Thread Pete Stephenson
On Tue, Apr 21, 2015 at 4:25 AM, Charles Steinmetz csteinm...@yandex.com wrote: Pete wrote: On a related note, is it possible to extract any data regarding the training from the unit? Not as far as the time-nuts community knows, no (other than looking at the DAC voltage and temperature