[neonixie-l] Re: Jeff Thomas GPSII

[Terry S]

I switched to the GSTAR IV for my Nixichron. It's been way more reliable 
than the HaiCom ever was.

On Tuesday, March 20, 2018 at 9:44:37 PM UTC-5, Pramanicin wrote:
>
> Hi folkshas anyone used a different GPS received with Jeff's GPSII 
> clock other than the HaiCom 204-III that it came with? Looks like my 
> receiver may have given up the ghost as it doesn't appear to lock 
> anymore.
>
> Thanks,
>
> (Pharma) Nick
>

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[neonixie-l] Re: Jeff Thomas GPSII

[Robert L]

This:  https://www.tubeclockdb.com/user-submitted/354-jeff-thomas-gpsii.html

 
I've two modified here at home and a few out in the wild.


 

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[neonixie-l] Re: Jeff Thomas GPSII

[Nick]

On Wednesday, 21 March 2018 06:54:02 UTC+4, Terry S wrote:
>
> I switched to the GSTAR IV for my Nixichron. It's been way more reliable 
> than the HaiCom ever was.
>

Interesting - I've never had a HaiCom 204III fail on me,  They're still 
available - why not just get a new one?

Nick

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[neonixie-l] Re: Jeff Thomas GPSII

[Terry S]

My 204III worked flawlessly for years and then seemed to degrade slowly. I 
can't explain it. Maybe the RF environment got noisier and the receiver was 
not handling it well.

I'm glad I updated to the BR355, it's much smaller and rock solid reliable. 
There is a tiny flashing red LED on the edge.

There is one minor gotchya with the GlobalSat units. They have a "feature" 
that they do not update the output GPS coordinates unless the unit is 
moving a few MPH. The intent is that when used in a vehicle, the user 
doesn't see the vehicle position dither when sitting at a stop light or in 
your own driveway. This might be configurable via software, but with the 
PS2 interface, I wasn't able to configure the unit. I know this is possible 
as another user here posted cable building instructions to convert it to a 
standard serial port. Alas, my laptop has no serial port. It was just more 
trouble than it was worth, and my unit functioned plug-n-play.

So if you liked seeing the coordinates change slightly as the scroll across 
the Nixichron tubes, you'll miss that with the BR355. I don't know when it 
does update the GPS coordinates, but they are correct on my clock. Maybe 
just on power-up.

Terry

On Wednesday, March 21, 2018 at 3:29:51 AM UTC-5, Nick wrote:
>
> On Wednesday, 21 March 2018 06:54:02 UTC+4, Terry S wrote:
>>
>> I switched to the GSTAR IV for my Nixichron. It's been way more reliable 
>> than the HaiCom ever was.
>>
>
> Interesting - I've never had a HaiCom 204III fail on me,  They're still 
> available - why not just get a new one?
>
> Nick
>

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[neonixie-l] Re: Jeff Thomas GPSII Clock

[gregebert]

I *thought* about adding GPS to my most-recent clock, but the DS3231 chip 
I'm using is so doggone accurate I dont see the need. When daylight-savings 
started last month, I manually sync'd my clock to the time on my cellphone. 
A month later, it's still within a fraction of a second.

I also thought GPS might be a solution to changing my clock when 
daylight-savings started and ended, but after doing some research I found 
that those dates where time-changes occur are now standardized for the next 
20+ years, so I'll just program them in on my next code update.

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[neonixie-l] Re: Jeff Thomas GPSII Clock

[Mitch]

Greg, I used this:
https://github.com/JChristensen/Timezone

No tables necessary, it does the calculations. If I had to figure this out 
myself, I'd be in a rubber room now.


On Thursday, April 14, 2016 at 7:02:43 PM UTC-4, gregebert wrote:
>
> I *thought* about adding GPS to my most-recent clock, but the DS3231 chip 
> I'm using is so doggone accurate I dont see the need. When daylight-savings 
> started last month, I manually sync'd my clock to the time on my cellphone. 
> A month later, it's still within a fraction of a second.
>
> I also thought GPS might be a solution to changing my clock when 
> daylight-savings started and ended, but after doing some research I found 
> that those dates where time-changes occur are now standardized for the next 
> 20+ years, so I'll just program them in on my next code update.
>

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Re: [neonixie-l] Re: Jeff Thomas GPSII

[Nicholas Stock]

I can’t locate a reasonably priced HaiCom replacementI’ll check out the 
Gstar. I have some GlobalSat BR355’s with the PS/2  plug but there was no pin 
out info in the GPSII manual that I’m aware ofare they compatible?

Sent from my iPhone

> On Mar 20, 2018, at 21:07, Robert L  wrote:
> 
> This:  https://www.tubeclockdb.com/user-submitted/354-jeff-thomas-gpsii.html
> 
>  
> I've two modified here at home and a few out in the wild.
> 
> 
>  
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Re: [neonixie-l] Re: Jeff Thomas GPSII

[Terry Kennedy]

On Wednesday, March 21, 2018 at 12:25:12 AM UTC-4, Pramanicin wrote:
>
> I can’t locate a reasonably priced HaiCom replacementI’ll check out 
> the Gstar. I have some GlobalSat BR355’s with the PS/2  plug but there was 
> no pin out info in the GPSII manual that I’m aware ofare they 
> compatible?
>

The pinout is compatible. However, note that most of the earlier Jeff 
Thomas clocks / firmware require the 1PPS signal on the PS/2 connector, 
which more modern receivers don't provide. The clock probably displays its 
firmware date on power-up, in MMDDYY format. On the NixiChron, the first 
firmware to support receivers without 1PPS was 110105 and the last 
firmware that required 1PPS was 040604. I have heard (anecdotally) that 
there may be a slight modification needed on the PCB for older (not 
NixiChron) clocks. Someone will likely be along with additional details 
shortly.

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Re: [neonixie-l] Re: Jeff Thomas GPSII

[Terry S]

I did have to update the Nixichron firmware for the BR355. A side benefit 
was corrected handling of the DST changeover.


On Wednesday, March 21, 2018 at 2:04:02 AM UTC-5, Terry Kennedy wrote:
>
> On Wednesday, March 21, 2018 at 12:25:12 AM UTC-4, Pramanicin wrote:
>>
>> I can’t locate a reasonably priced HaiCom replacementI’ll check out 
>> the Gstar. I have some GlobalSat BR355’s with the PS/2  plug but there was 
>> no pin out info in the GPSII manual that I’m aware ofare they 
>> compatible?
>>
>
> The pinout is compatible. However, note that most of the earlier Jeff 
> Thomas clocks / firmware require the 1PPS signal on the PS/2 connector, 
> which more modern receivers don't provide. The clock probably displays its 
> firmware date on power-up, in MMDDYY format. On the NixiChron, the first 
> firmware to support receivers without 1PPS was 110105 and the last 
> firmware that required 1PPS was 040604. I have heard (anecdotally) that 
> there may be a slight modification needed on the PCB for older (not 
> NixiChron) clocks. Someone will likely be along with additional details 
> shortly.
>

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Re: [neonixie-l] Re: Jeff Thomas GPSII

[MichaelB]

Nick, i have 5 or 6 of them. Email me

On Tuesday, March 20, 2018 at 9:25:12 PM UTC-7, Pramanicin wrote:
>
> I can’t locate a reasonably priced HaiCom replacementI’ll check out 
> the Gstar. I have some GlobalSat BR355’s with the PS/2  plug but there was 
> no pin out info in the GPSII manual that I’m aware ofare they 
> compatible?
>
> Sent from my iPhone
>
> On Mar 20, 2018, at 21:07, Robert L > 
> wrote:
>
> This:  
> https://www.tubeclockdb.com/user-submitted/354-jeff-thomas-gpsii.html
>
>  
> I've two modified here at home and a few out in the wild.
>
>
>  
>
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> .
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>
>

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