[time-nuts] Argo AS-210 frame

[jim stephens]

Does anyone have a lead on the oscillator in this frame as far as repair 
/ replacement?


A friend has one with all the plugins, and one extra spot.  If I 
understand it, he also has an 18ghz plugin to fit that.


But currently the oscillator seems kaput.  He's checked all of the fuses 
he could get to according to the manual, and is looking for two others 
that currently alude him.


If anyone has had one apart and has some words on the process of working 
on them, he said he had a hell of a time disassembling things.  Also 
there are only shards of part of the case, and he seems to think the 
sizes of the panels are custom, and we can't rob from a donor TM-515.


Would appreciate anyone who has worked on one to let us know.
thanks
Jim
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Re: [time-nuts] SOPHOS discussion of GPS jamming and eLoran

[jim stephens]

On 8/9/2017 12:15 AM, Martin Burnicki wrote:

Dave B via time-nuts wrote:

Or...

http://bit.ly/2hGKTgXThat goes to:-

There are 2 problems I see with this kind of link:

1.) A user doesn't see where the link takes him before he has clicked on
the link, so he can easily be taken to a "bad" web site.

Bitly has a feature to preview the link destination.
For example, for http://bit.ly/2hGKTgX add a plus character 
http://bit.ly/2hGKTgX+


You get this information with the + version of the link:

Cyberattacks on GPS leave ships sailing in dangerous waters – Naked Security
https://nakedsecurity.sophos.com/2017/08/07/cyberattacks-on-gps-leave-ships-sailing-in-dangerous-waters

bitly.com/2hGKTgX


Info copied from Bit.ly web site FAQ.

 There were some "preview shortened link" sites, but you'd have to 
trust one of those to use that approach.


When I have a link like this I wish to expand, I use linux command line 
/ curses browser lynx.  No way to infect anything with it, and view all 
the indirections as they pop up.


I agree, I seldom bother with the current malware / security 
environment, better to do that than risk it.  And I always tell anyone 
who asks me for advise as you do, skip it, unless you really know what 
you are doing, or you will get pawned.


thanks
Jim
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Re: [time-nuts] The clocks at Windsor Castle, UK

[jim stephens]

On 6/16/2017 3:31 PM, Bob kb8tq wrote:

Hi

They have been a novelty item just about as long as people have made clocks.
Exactly what they do or do not have for adjustment capability would be very much
a “that depends” kind of thing. There must be some method of getting the beast
up to sync. It *could* be pretty involved.

Bob
My father and I were @ a Costco quite some time ago and there was a very 
nice clock with full Westminster chimes & moon phase. Drove the wife 
nuts that we stood around fiddling with it to get it set properly and 
back in phase with the other dials.


One of those things that sticks in your gut sometimes if you're a time 
nut.  My dad was my original time nut.  He found out that he could take 
pocket watches apart when he was a kid and get them running again (1930s).


Fathers Day plug as well.  Miss him a lot
thanks
Jim

On Jun 16, 2017, at 6:02 PM, Hal Murray  wrote:


kb...@n1k.org said:

One thing that may be missing is that the clocks involved also keep track of
other things (date, lunar phase, sunrise / sunset …). Forcing them to gain
or loose a day might mess some of that  up.

I haven't worked with that sort of clock.  I would expect they would have
some mechanism to set the clock back without damaging things.  Do they?


--
These are my opinions.  I hate spam.



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Re: [time-nuts] OT - USB to LPT Adapter - Does it exist?

[Jim Stephens]

On 1/11/2013 8:46 AM, Chris Albertson wrote:

On Fri, Jan 11, 2013 at 5:09 AM, J. L. Trantham jlt...@att.net wrote:


My goal is to connect a parallel port chip programmer via USB but the
software only looks for LPT ports.  It works with PCMCIA to parallel port
adapters but I haven't solved the puzzle yet with a USB connected device.



I think the best solution is to finally retire that old  parallel port chip
programmer and replace it with something more modern.  You might have paid
a lot for it but today $35 will get you something with a USB cnetion and
then you don't need the printer port.



Chris Albertson
Redondo Beach, California

Chris,
there are programmers out right now that include the parallel port 
bitbanging feature.  Old isn't part of the equation.


They are identified with the willem in the title in some cases. The 
one I have derives the power for the logic to run the board and oversee 
the programmer from a USB connection.  The data to and from the device 
is sent via the parallel port to a PC with the software.


Power for programming comes from a wall wart.

The parallel port must be a physical LPT port as mentioned here, on the 
PC because of timing issues.  I don't think the programming timing is 
done by the board, but by the PC's code banging the port.


Many discussions here all have touched on how good you can rely on 
timing when USB is involved, so I doubt if the USB extenders will work 
very well.  People who have tried may comment here, but I would not go 
down that path.


A higher cost fully standalone USB attached device is the other 
alternative, but would probably still require its own power as well to 
get the programming voltages and currents required.  What comes down the 
USB port probably would not be enough.  That is a bit off topic, but 
worth mentioning.  I am commenting on full capability prom programmers 
which will program a wide variety of devices.  If you had to make a USB 
dongle to program a specific device you might get away with it.  However 
to handle large devices which require high speed to get them programmed 
in a reasonable time period would probably need more power.

Jim

http://www.ebay.com/itm/261149380462

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Re: [time-nuts] 8051 with RTC

[Jim Stephens]

On 2/28/2012 1:09 PM, saidj...@aol.com wrote:

Hello troops,

been looking for a modern 8051 with low power standby (0.5mA) and  an
internal RTC (hardware RTC).

Does anyone have any ideas?

Yes, I know there are other parts (PIC, AVR, ARM, etc etc etc), but I would
  like to stay with the 8051. Also would really like to prevent an external
I2C or  SPI RTC if at all possible.

Thanks,
Said
The I2C approach or external spi allows you to just power the RTC part 
for low power.


I did an STC I2C part for linux, was not much fuss at all.  It would not 
be hard to use the linux driver code if you are using c, or if you are 
not, it is still simple enough to do in assembler code.


Jim

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[time-nuts] Garmin 255W GPS units

[jim stephens]

I have access to a large number of these units (~600).  We are in the
process of scanning them for functional units.

They are 4 dashtop type car or boat units.  I have played with a functional
one, and accessed some info with free software, and would of course like to
get to the actual live position.

I am open to any ideas from anyone who would like the units which are not
working for parts.  It appears that the units which have functional
internals, but no display may be as many as 100 total.  Hopefully no more
than 50% will be dead, and parts only, but it may go as high as 75%.

These units appear to have spent time submerged as far as the damage
sustained.  They are purchased from an insurance salvage situation.

I have managed to dismantle them down to a housing set, battery, processor
board, display assembly, and misc. hardware.

Please contact me at jwsmobile [at] g[m] ail.com  (removing special
characters).

Thanks
Jim
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