[time-nuts] HP 107BR on eBay

Found a cosmetically nice HP 107BR on eBay right now. Hewlett Packard HP 107BR Quartz Oscillator Vintage Cheers, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and

Re: [time-nuts] Hemisphere Antenna PCB

Hi I think I’d wait for the next batch of “new old stock” telecom L1 only GPS antennas to show up. I’d bet they will be roughly the same price. At least with them you also get the enclosure. They do show up in various conditions at various prices:

[time-nuts] Hemisphere Antenna PCB

These Hemisphere GNSS 500-1210-004# antenna / pre-amp boards (bulk, bare) with no outdoor fiberglass enclosure appear to be same size used in A21 model. Good for experimenter. https://hemispheregnss.com/Products/Products/Peripherals/a21e284a2-antenna-135 Hemisphere GNSS is HQ in Scottsdale, AZ

Re: [time-nuts] eBay GPS antennas

On 2/16/18 10:47 AM, Bob kb8tq wrote: Hi Well, the interesting point about Glonass timing is that it is independent of the GPS empire. Galileo is another independent time source. Running a GPSDO linked to each one would let you inter-compare the time from each of them. Indeed I would *guess*

[time-nuts] Motorola M12+ breakout board

Besides the Furuno GT-8036 breakout board, I just did a layout for a board that converts the pinouts of Motorola M12+ compatible receivers to a 0.1" 9-pin header that (mostly) matches the Adafruit Ultimate GPS. The Adafruit ENABLE pin is repurposed as a DGPS RTCM corrections input and the

[time-nuts] SRS PRS10 breakout board

Recently I was alerted to a 24 hour closeout special for the weirdo hybrid DSUB connector used by the SRS PRS-10 and FRS rubidium oscillators. I scored 45 of them for dirt, dirt cheap. I can get the special coax inserts from Mouser (around $12 each... ugh). S... I'm going to do an

Re: [time-nuts] eBay GPS antennas

Hi Part of the issue with Glonass is the accuracy of the datum. It *can* be used for navigation and timing. It’s best to use it stand alone. Survey a location that is specific to it’s datum and then lock the module into timing mode. Don’t try to run with a GPS survey as your location. All that

Re: [time-nuts] eBay GPS antennas

Yo Bob! On Fri, 16 Feb 2018 13:47:24 -0500 Bob kb8tq wrote: > Reports to date on Glonass have not been encouraging. I have been testing position accuracy lately on a self contained u-blox 8 with built-in antenna supposedly GLONASS capable. I write a Python script to selectively

Re: [time-nuts] Furuno GT-8031 breakout board

Maek Sims wrote: I have several Motorola compatible GPS receivers... and not one of them does a perfect emulation of the Motorola devices. Some are quite close and not likely to cause problems... others are superiorly craptastic. Are there any readily available boards that will substitute for

Re: [time-nuts] eBay GPS antennas

Hi A full blown choke ring antenna is a pretty big heavy gizmo. That said, yes indeed, some shipping charges are insane. Bob > On Feb 16, 2018, at 1:51 PM, Wes wrote: > > On 2/16/2018 11:31 AM, Stewart Cobb wrote: >> ... >> >> For example, any AeroAntenna whose part

Re: [time-nuts] eBay GPS antennas

On 2/16/2018 11:31 AM, Stewart Cobb wrote: ... For example, any AeroAntenna whose part number starts with "AT2775" is a dual-frequency L1/L2 GPS antenna. AT2775-42 is a near-survey-grade antenna, and one of them is available right now (item 263500294711) at a starting bid of $20, after expiring

Re: [time-nuts] eBay GPS antennas

Hi Well, the interesting point about Glonass timing is that it is independent of the GPS empire. Galileo is another independent time source. Running a GPSDO linked to each one would let you inter-compare the time from each of them. Indeed I would *guess* that Galileo would do pretty well.

[time-nuts] eBay GPS antennas

FYI, Antcom and AeroAntenna are two manufacturers of high-quality American-made GPS / GNSS antennas. Antcom's datasheets are confusing to read, and AeroAntenna hides theirs behind a customer-login barrier, so most of eBay doesn't know exactly what they are. This means that good antennas are often

[time-nuts] Furuno GT-8031 breakout board

I have several Motorola compatible GPS receivers... and not one of them does a perfect emulation of the Motorola devices. Some are quite close and not likely to cause problems... others are superiorly craptastic. --- >Even more exciting, some of the “M12 like”

Re: [time-nuts] Furuno GT-8031 breakout board

Hi Even more exciting, some of the “M12 like” devices are close, but not exact copies of the M12 command set. Your GPSDO may be fine with the differences on this device, but not so happy with the differences on some other device. Bob > On Feb 16, 2018, at 12:50 PM, Mark Sims

[time-nuts] Furuno GT-8031 breakout board

No, the Tbolt does not have a separate receiver board... plus its' GPS is rather special... the RF chain is locked to the OCXO so it does not produce any sawtooth error. The Lucent KS firmware expects the GPS to support the older 6/8 channel messages. The newer 12 channel messages are

Re: [time-nuts] Furuno GT-8031 breakout board

Never having opened my TBolt, are the GT-8736 boards of use to replace the aging and partly deaf receiver in that? Or for a KS-24019? Thanks Dave -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Gregory Maxwell Sent: 15 February 2018 23:46 To:

Re: [time-nuts] eBay GPS antenna test.

Bob wrote: Hi Just so people don’t get to down on eBay antennas: I have gotten some deals on eBay I just couldn't have gotten elsewhere. That is a nice looking antenna. A bit pricey for my budget. I thought just north of $100 for a used Leica choke ring job was about it. The Trimble antenna I