Re: [time-nuts] GPS satellite outages.

2017-05-19 Thread Magnus Danielson
Hi Mark, Both PRN 11 and PRN 12 is listed for outage due to maintenance. During that period they should not be tracked. I sent the latest annoucement showing this. Receivers should follow the health status, and we should monitor if it is being ignored. Cheers, Magnus On 05/19/2017 02:47

Re: [time-nuts] Looking for info on Trimble 16634-10

2017-05-19 Thread Bill Hawkins
FWIW, that looks like aviation equipment (gov't or civil), with a locking connector. That stuff is designed for minimum size and weight. You might find the inside of the box quite cramped. Buying aviation parts is even more expensive than buying boat parts. Bill Hawkins -Original

Re: [time-nuts] Looking for info on Trimble 16634-10

2017-05-19 Thread Bob Bownes
Pretty sure that connector is an off the shelf Amphenol part. If you can't find it, however, you can replace it with an off the shelf one that will fit in the same hole. (If your lucky, you can even re-use the pins.) The replacement will run you about $30-40 for the pair, chassis and plug.

Re: [time-nuts] Looking for info on Trimble 16634-10

2017-05-19 Thread Bob kb8tq
Hi The mating side of that 22 pin connector isn’t going to be cheap. It looks like something out of their government systems group back in the late 90’s. If it is, you may have a hard time getting info on it. I’d pop it open and see what’s inside. At least that will give you an idea if it’s

[time-nuts] Looking for info on Trimble 16634-10

2017-05-19 Thread Scott Armstrong
Hello all, I acquired a Trimble 16634-10 receiver. A search of the web has turned up nothing so far. The unit is in a steel box built like a tank. SMA connector for antenna input and a 22 pin circular connector for the I/O and power Does anyone have any pin out information, specs, etc.? A

Re: [time-nuts] Machining some aluminum help!

2017-05-19 Thread Bob kb8tq
Hi > On May 19, 2017, at 5:35 PM, Chris Albertson > wrote: > > Yes, threaded inserts. There are many kinds but they are used almost > universally for cases where the material to be threaded is soft, like > aluminum. They also eliminate or reduce galvanic

Re: [time-nuts] Machining some aluminum help!

2017-05-19 Thread Chris Albertson
I worked on a project like this once. No screws at all. Rather then a 0.1 PSI over pressure. the interior was flush with dry gas then pumped out with to a crude vacuum with a hand pump. Air pressure alone force the cover plate on. OK a couple screws where there just to aid in assembly but the

Re: [time-nuts] Machining some aluminum help!

2017-05-19 Thread Chris Albertson
Yes, threaded inserts. There are many kinds but they are used almost universally for cases where the material to be threaded is soft, like aluminum. They also eliminate or reduce galvanic corrosion which is an issue with steel screws in aluminum. (that said, as long as you keep water away you

Re: [time-nuts] Machining some aluminum help!

2017-05-19 Thread Bob Bownes
We also used helicoils in titanium frames of the supercomputer I used to work with. Meant we could use relatively standard fasteners without fear of falling. On a time nuts related note, I have a u blox GPS-1E that seems to be stuck spewing out in ublox format. With no development sw

[time-nuts] GPS satellite outages.

2017-05-19 Thread Mark Sims
Earlier today, GPS sat PRN 11 was offline for a few hours. PRN 12 will be offline until tomorrow. I'm not sure if it is the cause, but my Ublox M8 locked up. My Venus timing receiver says it is tracking PRN 12. Most of my other receivers sat PRN 12 is either unhealthy or visible but not

Re: [time-nuts] Machining some aluminum help!

2017-05-19 Thread Scott McGrath
Corby Unless you have the tubing and plates machined flat they will leak as the tubing sides are not guaranteed to be flat and parallel wrt each side and aluminum plate stock is not flat unless you purchase 'tooling plate' which is ground parallel on both sides So creating a seal is

[time-nuts] Machining some aluminum help!

2017-05-19 Thread cdelect
Thanks everyone. Not looking for a redesign, just figuring out how to get the holes drilled and tapped. I have come up with a scheme that looks promising and will let you know how it goes. The enclosure only has to hold +.1PSI of dry nitrogen without leaking. It will have a pressure sensor

Re: [time-nuts] Bay Area Maker Faire '17

2017-05-19 Thread Lincoln
I will be going, likely tomorrow… > On May 12, 2017, at 7:46 AM, Nick Sayer via time-nuts > wrote: > > Anybody else going to Bay Area Maker Faire next weekend? I’ll have a booth > there (heavy on clocks and GPS) and would love to meet anyone going. >

Re: [time-nuts] Machining some aluminum help!

2017-05-19 Thread Lincoln
> > There are a lot of variables involved. Run the screws in and out of the > aluminum a number of times and > the holes will fail first ….There are other gotchas as well. > > Bob > This is where helicoils come in to play. They are used a lot on the CVD furnaces that I used to make parts

Re: [time-nuts] Machining some aluminum help!

2017-05-19 Thread Chris Albertson
To tell the truth I had not worked this out.But I wonder of the screws fail first on they are in aluminum holes with only 1/4 of thread. Which fails depends on the material and the number of engaged threads, But if what you say is right for this case. It strengthens my case for using self

[time-nuts] MIT flea meet-up for time-nuts

2017-05-19 Thread Eric Scace
The MIT Flea occurs this Sunday (May 21) from 09:00–14:00. Come join us for a bite at Flour Café at the end of the block (190 Mass Ave) at 11:30. I’d love to hear about your time projects & lab, see your

Re: [time-nuts] Machining some aluminum help!

2017-05-19 Thread Joseph Gwinn
On Fri, 19 May 2017 12:00:01 -0400, time-nuts-requ...@febo.com wrote: > Re: [time-nuts] Machining some aluminum help! It's much easier to use thread-forming taps in aluminum than thread cutting, and the threads are far stronger. Blind holes are not as large a problem. Lubricate with soft wax,