[time-nuts] nuts about position (cheap receiver)

There are some sellers on Ebay LEA-5T receivers on Ebay for cheap. They are pin and layout compatible with the Trimble Resolution-T devices. I bought a couple from this guy ($24 each) and they do output the RAW and SFRB messages. He also has LEA-4T and Trimble boards. There are also other

Re: [time-nuts] nuts about position

On Tue, May 1, 2018 at 2:14 PM, Hal Murray wrote: > > kb...@n1k.org said: >> One important qualifier to re-state. L1 post processing is very dependent on >> the distance to an “open” source of correction data. The spacing of those >> sites over the US is highly variable.

[time-nuts] nuts about position

I added some debug log info that shows how many bytes the receiver sent between time messages. The LEA-6T sends around 500-600 bytes every second. That fits easily into 9600 baud. The M8N tracking all sats and with all the raw messages enabled spews around 4000 bytes. That would require

Re: [time-nuts] Racal 9475 Rubidium

They also suffer from all the typical electronic component age related faults. I had 5 units that had four bad capacitors each, for instance, and after replacing the caps, they run well. Regards, Jerry > On May 1, 2018, at 6:16 AM, Bob kb8tq wrote: > > Hi > > Ok, quick

Re: [time-nuts] Racal 9475 Rubidium

On 5/1/2018 2:18 AM, Paul Bicknell wrote: As I have just bought a Racal 9475 Rubidium and it has problems Is there any stock faults ? What is the life of the rubidium standard? The Racal manual for this only covers the support stuff.  Your problem is almost certainly with the Rb

Re: [time-nuts] Racal 9475 Rubidium

Hi Ok, quick intro to Rb standards: On an Rb you have a light bulb. It’s a really weird bulb but a bulb none the less. On most (but not all ) designs the bulb has a finite life. Various improvements over the years have stretched out the life. Just when which outfits did which improvements ….

Re: [time-nuts] Racal 9475 Rubidium

Most obvious issue - is the Rb "bulb" coated on the inside with a metallic deposit - if so it's time to use a heat gun to move it back to where it belongs. David -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Paul Bicknell Sent: 01 May 2018 10:19 To:

Re: [time-nuts] nuts about position

Hi The “drops stuff” problem is exactly what I saw trying to run at lower baud rates. The port is *not* full of data, there’s plenty of time to get it all out at a lower baud rate. For some reason (buffers maybe) these modules start dropping data *way* earlier than you would think they should.

Re: [time-nuts] Racal 9475 Rubidium

Hi, There's a copy of the manual at: http://www.ko4bb.com What are the symptoms? Angus. On Tue, 1 May 2018 10:18:35 +0100, you wrote: >Hi all new member hear could any of you help with the following information > > > >As I have just bought a Racal 9475 Rubidium and it has problems > > >

[time-nuts] Racal 9475 Rubidium

Hi all new member hear could any of you help with the following information As I have just bought a Racal 9475 Rubidium and it has problems Is there any stock faults ? What is the life of the rubidium standard? Regards Paul ___ time-nuts

Re: [time-nuts] nuts about position

kb...@n1k.org said: > One important qualifier to re-state. L1 post processing is very dependent on > the distance to an “open” source of correction data. The spacing of those > sites over the US is highly variable. If you get outside the US it is very > much a “that depends” sort of