Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532Aand T-bolt)

On 4/21/16 6:03 PM, Tom Van Baak wrote: Paul, If possible can you make an audio recording of a woodpecker attack? You know it's a form of 1pPS. I'd like to add that data set to my list of ADEV plots. I am sure, like almost all oscillators, it will have 1/f flicker noise. Heatbeats do,

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

The silicone tape also has the advantage (if buying from Uline) that you can get two (2) rolls; for the 3M Temflex 2155 Rubber Splicing Tape the minimum is 10 rolls. Jeremy On 4/21/2016 5:57 PM, William H. Fite wrote: Mark is right on target re the connectors; get the best you can afford.

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

Mark is right on target re the connectors; get the best you can afford. Amphenol or equivalent. Self-fusing silicone tape is a lot faster and easier than the 3M black tape. Just stretch and wrap, it conforms beautifully, is highly resistant to UV, and won't stiffen and crack in the cold. Best of

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532Aand T-bolt)

Paul, If possible can you make an audio recording of a woodpecker attack? You know it's a form of 1pPS. I'd like to add that data set to my list of ADEV plots. /tvb - Original Message - From: "paul swed" To: "Discussion of precise time and frequency measurement"

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

All accurate accept the aging rate of any coax/heliax. Useful life =Years of expected life/woodpecker attacks. I would never have believed it but I am actually having trouble with those birds. :-) Just never know. Regards Paul WB8TSL On Thu, Apr 21, 2016 at 5:33 PM, Tom Holmes

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

That is more or less the same method I use for my amateur radio activities. Home Depot in Canada sells similar 3M products which is helpful during quick weekend projects. Professionally I've seen other methods used but on my own time I like the "splicing tape" covered with super "33 tape"

[time-nuts] Lady Heather coming soon to a Linux box near you...

>Would there be enough horsepower for a Pi 3 to run Lady Heather and act as a >stratum 1 NTP server? I suspect so, the PI3 has quad core 64-bit capable 1.2GHz processor. The PI3 seems to be about 50% faster than the PI2. It also runs about code about as fast as a 2 GHz Pentium 4. But the

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

Ryan... I've done a lot of tower work over the years, and have taken down quite a few antennas, which of course meant removing whatever seal was used and separating the connector halves. I have never found an N connector seized. Usually a gentle twist using a pair of pliers will break the

Re: [time-nuts] Lady Heather coming soon to a Linux box near you...

Would there be enough horsepower for a Pi 3 to run Lady Heather and act as a stratum 1 NTP server? D. On 21 April 2016 at 06:13, Mark Sims wrote: > Well, Lady Heather finally got off her ample ass and dug into the tao of > X11 and all things Linuxy. The program is

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

DX Engineering (another great compuany to do business with) recomends these two products: http://www.dxengineering.com/ 3M Temflex 2155 Rubber Splicing Tape followed with a covering of Scotch Super 33+ tape The rubber conforms tightly with the connectors and waterproofs the connection while

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

BODY { font-family:Arial, Helvetica, sans-serif;font-size:12px; } For long distance you need the right cable. Since the Antenna is likely designed for 50 ohms use 50 ohm cable If it's a fixed installation maybe RG8 with pl259 to N adaptor would be a good bet ? This garden

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

On 4/21/16 10:07 AM, Ryan Stasel wrote: All, Really awesome answers, thanks! For the sealing question, it was more of a “should I bother with something like anti-seize” or the like on the actual thread-thread N interface. The actual connector crimp, was planning on just using a couple layers

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

Yup... layers = longevity 3M self-fusing rubber comformal coating 3M electrical tap (with a fold back for removal) conformal coating. I've got 12 year old connections that are still going strong with no measurable degradation. I always use the best cable and connectors I can find... do it

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

Ryan a slight heads up. Time Nuts is not about time accuracy as many people assume. Its actually about the time we all waste looking for what we know we have. We just measure that time accurately. I do not use anti seize. Nothing against it just one more glob of stuff to deal with. If you use the

Re: [time-nuts] Subject change - sources for coax cable and other RF stuff - was RG6 or LMR400 for GPS Antenna

Antenna Farm is also good. They'll terminate any length for you at reasonable cost. http://www.theantennafarm.com/ No financial interest, just a satisfied customer. Bill On Thursday, April 21, 2016, DaveH wrote: > If you are looking at getting some LMR400, Ham

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

All, Really awesome answers, thanks! For the sealing question, it was more of a “should I bother with something like anti-seize” or the like on the actual thread-thread N interface. The actual connector crimp, was planning on just using a couple layers of the heat-shrink with adhesive. That

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

On Wed, Apr 20, 2016 at 6:03 PM, Ryan Stasel wrote: > Other question: any tips for the exterior N connection? I can "weatherproof" > the actual cable-connector crimp, but I'm curious if anyone bothers to "lube" > the N connector to keep moisture from otherwise seizing it

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

Hi Most of the data sheets on RG-6 Quad show it around 9 db per 100’. Like any of the “old” (RG) specs, there really is no control on who does what with a given type of cable. The direct burial versions seem to be a little more consistent. Bob > On Apr 20, 2016, at 6:48 PM, Pete Stephenson

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

With respect to sealing. Everyone has a method. I use what I learned in the Navy. I could see how well the connections held up in the worst conditions sun cold heat wet humidity... Layer of rubber tape scotch kote Layer of plastic tape scotch kote If done well the connector releases just fine even

Re: [time-nuts] Adapting my GPSDO to the FE-5680A

On Wed, 20 Apr 2016 15:31:04 -0700 Nick Sayer via time-nuts wrote: > I believe there are two separate commands for tuning the 5680 - one is > “temporary” and one writes through to the EEPROM. I’ll be using the latter, > of course. Ah.. ok. Didn't know there are two. >

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

Ryan, LMR400 give you low loss and relatively high temperature stability. That's what I use. If you can get it at a decent price, use it. The foam core isolation is sensitive to being squeezed. Also be careful not to make tight bends, but rather let it have large bending radius. Cheers,

Re: [time-nuts] Lady Heather coming soon to a Linux box near you...

On Thu, 21 Apr 2016 05:13:20 + Mark Sims wrote: > Well, Lady Heather finally got off her ample ass and dug into the > tao of X11 and all things Linuxy. Cool! What did you use as widget set? Or did you use xlib directly? > One thing that will probably not be supported

Re: [time-nuts] Lady Heather coming soon to a Linux box near you...

select() is the best way to keep from blocking, at least if you’re not going to use threads or sub-processes. Unless you’re going to support one or more of the intermediate sound libraries (ALSA comes to mind), then playing a sound involves opening a device, using ioctl()s to set the format

Re: [time-nuts] Adapting my GPSDO to the FE-5680A

On Wed, 20 Apr 2016 22:44:49 + (UTC) Bruce Griffiths wrote: > Sampling at 4x(10MHz + 1kHz) followed by a digital image reject mixer > would work better.The front end analog filter only needs to reject > unwanted nyquist regions, thus it can have a wider bandwidth

Re: [time-nuts] Lady Heather coming soon to a Linux box near you...

On Wed, Apr 20, 2016 at 10:13 PM, Mark Sims wrote: > > One thing that will probably not be supported is sound file support... > playing .WAV files asynchronously does not seem to come naturally to > Linux. Does anybody know of a simple / lazy bastard way to play a sound >

[time-nuts] Subject change - sources for coax cable and other RF stuff - was RG6 or LMR400 for GPS Antenna

If you are looking at getting some LMR400, Ham Radio Outlet has a branch in Portland and they are really nice people to deal with. http://www.hamradio.com/ I have zero financial interest outside of being a very happy customer. The Wire Man is also very very good.

[time-nuts] Lady Heather coming soon to a Linux box near you...

Well, Lady Heather finally got off her ample ass and dug into the tao of X11 and all things Linuxy. The program is currently working well enough to display log files, etc. Serial port initialization for non-blocking asynchronous I/O needs to be completed. I have it working on a couple of