[time-nuts] 100% Gamble HP 5062C

Found the 5 MHz osc assembly floating around and the nuts removed from the PCB https://photos.app.goo.gl/5AM9tW26UQYNyz1k2 -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] GPS antenna gain

I had the misfortune of using those very PCTEL antennas in a timing application and excessive gain was a problem with the loss of frame sync whenever the receiver had too much signal from any satellite. It was a highly intermittent problem that appeared every few days; always after I had tested

Re: [time-nuts] TV Signals as a frequency reference

I was a chief engineer for a TV station during the transition to digital. I am now a transmitter supervisor for two digital TV transmitters. None of the stations in my area have a frequency standard. Time in injected into the digital stream usually from a pc clock. This pc may or may not be

[time-nuts] Repairs and mods underway on HP 3586b

Thanks to those who responded to my requests off-list for details on correcting a partially functional HP 3586b. Here is where I am at with it; Replaced the incandescent lamp inside of the 5060-0329 rotary encoder for a white LED with a resistor to work at 5VDC. Ordered a 75 ohm BNC chassis jack

Re: [time-nuts] New GNSS chipsets

mag...@rubidium.dyndns.org said: > I have advocated for receivers able to handle multiple frequencies and > multiple GNSS for some time, sneaking it into documents, so there should be > some preparations for this now. How well do various GNSS track UTC and/or eachother? > The benefit is

Re: [time-nuts] GPS ANTENNA

just use a bias tee to feed in the antenna volts :) -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: 01 April 2018 23:29 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] GPS ANTENNA An unusual

Re: [time-nuts] GPS ANTENNA

Just use a standard attenuator between a pair of bias T's with their dc ports connected together. Bruce > > On 02 April 2018 at 10:29 Azelio Boriani wrote: > > An unusual attenuator with a DC pass. > > On Sun, Apr 1, 2018 at 10:21 PM, David C. Partridge

Re: [time-nuts] GPS ANTENNA

Hi They are indeed a bit unusual. Generally you do a DC block and bias tee ahead of the attenuator. For a “self contained” approach, a second block and bias tee pulls the DC of the GPSDO side of the attenuator. My preference has been to just run the bias tee with an external DC source. Bob

Re: [time-nuts] New GNSS chipsets

Tom, Yes, that was my take on this as well. With easily available sub-meter position fixes, I believe that even more uses will be found for this technology. With the Broadcom chipsets going into phones, Google Maps will no longer tell you to take the highway ramp, when you are already on the

Re: [time-nuts] GPS ANTENNA

On 4/1/18 3:29 PM, Azelio Boriani wrote: An unusual attenuator with a DC pass. A few feet of RG-174 (or any 0.1" diameter coax) would probably work. On Sun, Apr 1, 2018 at 10:21 PM, David C. Partridge wrote: Or use a choke ring survey antenna and an

Re: [time-nuts] New GNSS chipsets

Bob, If it was a glass of good bourbon, I'd take you up on that offer :-) The Broadcom chipsets are touted as being specifically for phones. Whether we'll be able to buy stand alone modules, I don't know. The uBlox chipsets have in that past been widely available at rational prices. Hopefully

Re: [time-nuts] GPS ANTENNA

An unusual attenuator with a DC pass. On Sun, Apr 1, 2018 at 10:21 PM, David C. Partridge wrote: > Or use a choke ring survey antenna and an attenuator :) > > Dave > > -Original Message- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob

Re: [time-nuts] New GNSS chipsets

Hi I’d bet a warm glass of beer ( pick up only, no free delivery ) that you will not see them in user level modules ( = something you can fire up) at a rational price ( < $500) for quite a while ( = years …). The target market is integration in self driving / autonomous vehicles. If you

Re: [time-nuts] New GNSS chipsets

Hi All; I think the real break through is using these different constellations and their different frequencies and looking at carrier phase verses timing elements. This should allow the removal of propagation delay. Cheers; Thomas Knox act...@hotmail.com

Re: [time-nuts] New GNSS chipsets

Joe, I'm not sure I had much influence, but I at least try to advocate for it to become a good market, so hopefully it will be affordable. It has actually been affordable for quite some time, so going multifrequency should be the next step and with that the benefits. Cheers, Magnus On

Re: [time-nuts] New GNSS chipsets

Magnus, When I can buy one of these new, multi-frequency receivers, I'll remember to thank you :-) I wonder if any of the three will be available this year. The Broadcom chipset in phones will be nice, but I'd also like a standalone module from anyone. More fun stuff to play with. Joe Gray W5JG

[time-nuts] HP 5061A and 5061B modules clear out!

Hi, I'm cleaning out a BUNCH of modules from HP 5061A/B. See listing on eBay below. More lots of other modules to follow in groups that will fit into flat rate boxes. If you have specific wants contact me off list! Cheers, Corby

Re: [time-nuts] GPS ANTENNA

Or use a choke ring survey antenna and an attenuator :) Dave -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob kb8tq Sent: 01 April 2018 14:43 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] GPS ANTENNA Hi Indeed,

Re: [time-nuts] GPS ANTENNA

Hi Indeed, it is *very* easy to put to much gain in front of a timing GNSS receiver. These beasts are trying to dig out a signal that you can’t even see with a spectrum analyzer. It’s way to far below the noise floor to detect that way. They optimize things pretty tightly to get that done

Re: [time-nuts] Lady Heather BST command line question

Hello, Thank you Mark, I had not put the zero in front of /GMT/BST and it obviously needed that as it's now working fine, many thanks for the great software! on 01/04/2018 08:51 you wrote: > Ooops, that should have been /b=2 to select the European time zone rule! >

Re: [time-nuts] GPS ANTENNA

On Sat, 31 Mar 2018 10:58:19 -0500, donandarline-Re5JQEeQqe8AvxtiuMwx3w wrote: > I found a supplier for high quality GPS antennas at a very reasonable > price. PCTEL GPSL1-TMG-SPI-40NCB. *** SNIP *** I had one of those on 25m cable, and it worked fine on a Tbolt , until i got an active antenna

[time-nuts] Lady Heather BST command line question

Ooops, that should have been /b=2 to select the European time zone rule! ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] TV Signals as a frequency reference

In the mid-1970's (when I was an EE student in college) I built a simple setup to compare the US color burst signal (3.5795454.. MHz) from an old vacuum tube color television set with a commercial surplus 5 MHz OCXO (probably from Bliley). The color burst frequency was exactly:315/88 = (63 *

[time-nuts] Lady Heather BST command line question

Try: /b=1 (sets European time change rule) /tz=0GMT/BST (sets time zone offset and names... and thats the number 0, not the letter O) It should then automatically switch between the time and time zone names according to the rule. For non-standard places, you can