[time-nuts] GPS Antenna Voltage-Dropping

I bought a 3.6-V Trimble Bullet GPS antenna on ePay and wish to use it with my T-bolt. Rather than try to internally modify the T-bolt to provide a 3.6-V antenna feed, I decided to try to build an in-line dropping adapter. I seriesed two Si diodes inside a 100 pf tubular ceramic capacitor a

Re: [time-nuts] OCXO sensitive to gravity

> > Someone commented a while back on the effect of gravity to a osc > as it rotated thru its 3D axis. > Attached, I've plotted the gravitational effects on the Freq of a > HP10811 osc > that has been placed in a box and tilted so that it is at its > null turnover G axis. > Plotted is the change

Re: [time-nuts] Splitting GPS antenna output

I use to use splitters that were rated for satellite dishes (Like directtv and dish). They down convert to 900-1.5 Mhz and they also pass DC. As time went on and we time nuts strive to do it right, I switched to Mini-circuits splitters and bias tee's. If any of you need it, MiniCircuits ran

Re: [time-nuts] Crystal aging

I realize that making measurements over a day or two says very little about long term aging. Most of my crystal oscillator experience has been with TCXOs in the communications industry. We are talking about orders of magnitude difference with regard to just about everything. In my experience, a goo

Re: [time-nuts] more PC<>AdHoc IO

I've used the DLP products and they work great See: www.moorepage.net/gps2.html for the DLP board that goes from TTL>USB and my mounting scheme. Just scroll down. Best, Dick Moore On Sep 2, 2009, at 11:59 AM, time-nuts-requ...@febo.com wrote: Message: 4 Date: Wed, 2 Sep 2009 08:38:01 -

Re: [time-nuts] Splitting GPS antenna output

Look out for "GPS Source" and "GPS Networking" splitters they are purpose built for GPS use, and are not limited to L1, like the Symmetricom/Agilent/HP family of splitters. btw 58535A is the HP 2 port splitter. -- Björn > Keep an eye open at swap meets etc., or even eBay, for something like

Re: [time-nuts] OCXO aging behavior

Alan Melia wrote: > Maybe this is not "aging" you are looking at...parts in 10^9 over a few > days I agree. Aging is the forest and you are watching the trees. The adjustment pot could also have some mechanical relaxation issues that work like delayed hysteresis. The 10811 designers had fits get

Re: [time-nuts] Finding out who bidders are

Sure. The feedback numbers seem to follow but that's all. Fact is now, even a buy it now shows "nothing", no id other than a sold date. Hope they leave feedback to the seller and track them that way. They are constantly changing everything, perhaps trying to emulate look feel of Amazon and other

Re: [time-nuts] [OT] more PC<>AdHoc IO

and forgot a place I have bought from http://www.sparkfun.com/ search for usb breakout -pete > While looking for something else, found this... > > http://www.diolan.com/common/products.html > > USB to whatever, with code examples. > > Not cheap, but the documentation looks good, and that's ofte

Re: [time-nuts] [OT] more PC<>AdHoc IO

I've done a couple designs that use FTDI chips. Just about ever USB to serial or parallel widget you see uses their chips. One low cost all ready build board example http://www.dlpdesign.com/usb/usb1232h.shtml I've not done biz with them but just an example. -pete > While looking for somethi

Re: [time-nuts] OCXO aging behavior

Maybe this is not "aging" you are looking at...parts in 10^9 over a few days sems a bit high for that (??) on a good quality crystal but I think you may find that is around the spec for the reference in the 1992. I never bother setting my (older Racals) counter to better than 1in 10^9 its good enou

Re: [time-nuts] Splitting GPS antenna output

Keep an eye open at swap meets etc., or even eBay, for something like an MCL ZAPD-2, http://www.minicircuits.com/pdfs/ZAPD-2+.pdf which is a 1 to 2 GHz splitter. It has DC continuity from 1 and 2 to the common. I put a 100 pF blocking cap in one of the ports, the other feeds DC to the anten

[time-nuts] Splitting GPS antenna output

I have two GPSDO's, a Tbolt and an Arbiter. When I got them (simultaneously) I wanted to get them up and I only had one antenna. However I confirmed that a consumer TV splitter works very well with the GPS antennas. There are some splitters that claim 2 GHz bandwidth. It's not useful for the intend

[time-nuts] OCXO aging behavior

I had always thought that crystals changed frequency consistently in one direction as they age. That is until recently. I was trying to get the reference in my 1992 as close as possible to my Z3801 and noticed that as I adjusted the fine pot, there didn't seem to be a place where the frequency stay

Re: [time-nuts] Finding out who bidders are

I recognie certain bidders by the number of buys. Bert In a message dated 9/2/2009 7:07:41 A.M. Eastern Daylight Time, fort...@bellsouth.net writes: The "Bidder Code" letters also changes, it is not fixed on a given users id. - Original Message - From: "Rex" To: "Discussion

Re: [time-nuts] Finding out who bidders are

Are you sure? I checked a number of times with things I'd bid on from different, some public, computers, some I've never, ever signed in with. -John === > The "Bidder Code" letters also changes, it is not fixed on a given users > id. > > > > - Original Message - > From: "Rex"

Re: [time-nuts] AD1861N

It is on there in the ebay store but the # is 250476372367. Bert In a message dated 9/2/2009 9:23:31 A.M. Eastern Daylight Time, jlt...@worldnet.att.net writes: Discovered my problem. I'm dyslexic. I was searching for AD1816N. Sorry, Joe -Original Message- From: time-nuts-bo

Re: [time-nuts] AD1861N

Discovered my problem. I'm dyslexic. I was searching for AD1816N. Sorry, Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Peter Vince Sent: Wednesday, September 02, 2009 8:02 AM To: Discussion of precise time and frequency measu

Re: [time-nuts] AD1861N

See user bbshonic, and specifically: (or http://tinyurl.com/ku4gky if the above gets mangled) TTFN,

Re: [time-nuts] AD1861N

I tried to find them but couldn't. Do you have an item number? Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkeh...@aol.com Sent: Tuesday, September 01, 2009 12:47 PM To: time-nuts@febo.com Cc: bbsha...@hotmail.com Subject: [ti

Re: [time-nuts] [OT] more (low cost) PC<>ad-hoc IO - even lower cost.

Yep, that works. Many of the "Softrock" SDR kits use that method ("Bit Banged" USB) for control of the local oscilator, filter selection and other IO. Works well, when it works. When you get the drivers mismatched, it can be hell! It's also limited to the low speed protocol, so there are some

Re: [time-nuts] Finding out who bidders are

The "Bidder Code" letters also changes, it is not fixed on a given users id. - Original Message - From: "Rex" To: "Discussion of precise time and frequency measurement" Sent: Tuesday, September 01, 2009 11:40 PM Subject: Re: [time-nuts] Finding out who bidders are Interesting ide

Re: [time-nuts] [OT] more (low cost) PC<>ad-hoc IO - even lower cost

http://www.recursion.jp/avrcdc/cdc-io.html This implements USB in the software of an AVR - no special USB chips required! - Original Message - From: "Dave Baxter" To: Sent: Wednesday, September 02, 2009 7:18 PM Subject: [time-nuts] [OT] more (low cost) PC<>ad-hoc IO And this cam

[time-nuts] [OT] more (low cost) PC<>ad-hoc IO

And this came to light. http://www.mat.ucsb.edu/~dano/CUI/ scroll down. Google on "Arduino USB" too. There is lots of stuff out there for the adventurious with lots of time to play, as well as for those that *Need it now!* and can pay. Regards. Dave B.

[time-nuts] [OT] more PC<>AdHoc IO

While looking for something else, found this... http://www.diolan.com/common/products.html USB to whatever, with code examples. Not cheap, but the documentation looks good, and that's often worth the cost alone, even if you are funding the thing from your own pocket! Dave B.

Re: [time-nuts] HP E2050A LAN/HPIB Gateway

Matt, I would be very interested in the python code. I got a good deal on the E2050A, and though I haven't set it up yet, I imagine it works the same as the E5810A, just without the DHCP and web config features. Adrian, I don't have the full manual, but I emailed you the "Installation and Configu